MTA Quiz Software Part 1 - Maysa Hassan

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| By Maysa Hassan

Maysa Hassan

Community Contributor

Quizzes Created: 1 | Total Attempts: 151

| Attempts: 151

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1/47 Questions

You need to gain a better understanding of the solution before writing the program. You decide to develope an algorithm that lists all necessary steps toperform an operation in the correct order. Any tecnique that you use should minimize complexity and ambiguity. Which of the following tecniques shouldyou use?
- Flowchart
- Decision table
- C# programme
- A paragraph in English

About This Quiz

MTA certifications are a great place to start if you would like to get into the technology field. MTA certifications address a wide spectrum of fundamental technical concepts, assess and validate core technical knowledge, and enhance technical credibility. Give the software quiz below a test to gauge how conversant you are on softwares.

MTA Quiz Software Part 1 - Maysa Hassan - Quiz

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2.

You are developing an algorithm for a retail Web site. You need to calculate discounts on certain items based on the quantity purchased. You developthe following decision table to calculate the discount: Quantity < 10 Y N N N Quantity < 50 Y Y N N Quantity < 100 Y Y Y N Discount 5 % 10 % 15 % 20 %If a customer buys 50 units of an item, what discount will be applicable to the purchase?
- 5 percent
- 10 percent
- 15 percent
- 20 percent
Correct Answer

A. 15 percent

Explanation

If a customer buys 50 units of an item, the discount that will be applicable to the purchase is 15 percent. This is because according to the decision table, for a quantity less than 50, the first condition is true (Y), so the discount is 5 percent. However, for a quantity less than 100, the second condition is also true (Y), so the discount is increased to 15 percent. Therefore, the correct answer is 15 percent.

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3.

Arrange the various activities of an application lifecycle in the order in which they are likely to occur.
- Requirements analysis, design, coding, testing, and release
- Design, requirements analysis, coding, testing, and release
- Release, requirements analysis, coding, testing, and design
- Requirements analysis, design, release, coding, and testing
Correct Answer

A. Requirements analysis, design, coding, testing, and release

Explanation

The correct order of activities in an application lifecycle is as follows: requirements analysis, design, coding, testing, and release. This sequence ensures that the application is developed based on the identified requirements, followed by designing the structure and components. Then, the actual coding takes place, followed by rigorous testing to identify and fix any issues. Finally, the application is released to the users. This order ensures a systematic and efficient development process.

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4.

Which of the following languages is not considered a high-level programming language?
- C#
- Visual Basic
- Common Intermediate Language
- C ++
Correct Answer

A. Common Intermediate Language

Explanation

Common Intermediate Language (CIL) is not considered a high-level programming language because it is an intermediate language used by the .NET framework. CIL is compiled from high-level languages like C# and Visual Basic and then executed by the Common Language Runtime (CLR). It is a low-level, platform-independent language that is closer to machine code than high-level languages. C# and Visual Basic, on the other hand, are high-level programming languages that provide abstractions and features to make programming easier and more productive. C++ is also a high-level programming language, but CIL is not.

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5.

You are writing a C# program that needs to iterate a fixed number of times. You need to make sure that your code is easy to understand and maintaineven when the loop body contains complex code. Which of the following C# statements provide the best solution for this requirement?
- While
- For
- Foreach
- Do-while
Correct Answer

A. For

Explanation

The "for" statement provides the best solution for this requirement because it allows you to specify the initialization, condition, and iterator all in one line, making it easy to understand and maintain. Additionally, the "for" loop is commonly used for iterating a fixed number of times, which aligns with the given requirement.

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6.

You have completed developing several major features of a new software application. You plan to provide an early look at the product to importantcustomers to gather some early feedback. Your application still misses features and you haven’t yet optimized the application for performance andsecurity. Which kind of testing should you perform with a limited number of important customers?
- White-box testing
- Black-box testing
- Alpha testing
- Beta testing
Correct Answer

A. Alpha testing

Explanation

Alpha testing is the appropriate kind of testing to perform with a limited number of important customers in this scenario. Alpha testing is conducted in the early stages of software development, where the software is tested by a select group of users who provide feedback on its functionality, usability, and overall performance. Since the application still lacks features and optimization, alpha testing allows the development team to gather valuable feedback and identify any issues or improvements needed before releasing the software to a larger audience.

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7.

You need to provide complex multi-way branching in your C# program. You need to make sure that your code is easy to read and understand. Which ofthe following C# statements should you use?
- Casr
- Break
- If-else
- Switch
Correct Answer

A. Switch

Explanation

To provide complex multi-way branching in a C# program, the appropriate statement to use is the switch statement. The switch statement allows you to evaluate the value of an expression and execute different blocks of code based on different cases. It provides a clear and readable way to handle multiple possible outcomes. The other options, such as casr, break, and if-else, do not provide the same level of flexibility and readability for complex multi-way branching.

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8.

You are writing a method namedPrintReportthat doesn't return a value to the calling code. Which keyword should you use in your methoddeclaration to indicate this fact?A
- Void
- Private
- Int
- String
Correct Answer

A. Void

Explanation

In this scenario, the correct keyword to use in the method declaration is "void". This indicates that the method does not return any value to the calling code. The "void" keyword is used when a method is intended to perform a certain action or task without returning any specific result.

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9.

You are writing a C# program that needs to manipulate very large integer values that may exceed 12 digits. The values can be positive or negative.Which data type should you use to store a variable like this?
- Int
- Float
- Double
- Long
Correct Answer

A. Long

Explanation

The correct data type to use for storing very large integer values that may exceed 12 digits, whether positive or negative, is long. The long data type in C# can store integer values ranging from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807, which is sufficient to handle the large values mentioned in the question. Int, float, and double data types have limitations on the range of values they can store, making them unsuitable for this scenario.

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10.

You are writing code for a class named Book . You should be able to get a list of all books sorted by the author’s last name. You need to write code to define this behavior of a class. Which of the following class elements should you use?
- Method
- Property
- Event
- Delegate
Correct Answer

A. Method

Explanation

To implement the behavior of getting a list of all books sorted by the author's last name, a method should be used. A method is a function that belongs to a class and can perform specific actions or calculations. In this case, the method can be defined within the Book class to retrieve the list of books and sort them based on the author's last name. By using a method, the desired behavior can be encapsulated within the class and easily called whenever needed.

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11.

You are in the process of developing a new software application. As defects are reported, you take the necessary steps to fix them. You need to make sure that each new fix doesn’t break anything that was previously working. Which type of testing should you use?
- Integration testing
- System testing
- Acceptance testing
- Regression testing
Correct Answer

A. Regression testing

Explanation

Regression testing is the type of testing that should be used in this scenario. Regression testing is performed to ensure that a new fix or change in the software does not introduce new defects or break any existing functionality that was previously working correctly. It involves retesting the previously tested functionality to make sure that it still works as expected after the fix has been implemented. This helps to identify any unintended side effects or issues caused by the fix and ensures the overall stability and reliability of the software application.

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12.

You are writing code for a business application by using C#. Write the following statement to declare an array:int[] numbers = { 1, 2, 3, 4, 5, };Now, you need to access the second item in this array (the number 2). Which of the following expression should you use?
- Numbers[0]
- Numbers[1]
- Numbers[2]
- Numbers[3]
Correct Answer

A. Numbers[1]

Explanation

To access the second item in the array, we need to use the index value 1 since arrays are zero-based in C#. Therefore, the correct expression to access the second item in the array is "numbers[1]".

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13.

You have written a C# method that opens a database connection by using theSqlConnectobject. The method retrieves some information from the database and then closes the connection. You need to make sure that your code fails gracefully when there is a database error. To handle this situation , you wrap the database code in a try-catch-finallyblock. You use two catch blocks—one to catch the exceptions of typeSqlException and the second to catch the exception of type Exception. Which of the following places should be the best choice for closing theSqlConnectionobject?
- Inside the try block, before the first catch block
- Inside the catch block that catches SqlException objects
- Inside the catch block that catches Exception objects
- Inside the finally block
Correct Answer

A. Inside the finally block

Explanation

Closing the SqlConnection object inside the finally block is the best choice. The finally block is always executed regardless of whether an exception is thrown or not. By closing the SqlConnection object inside the finally block, we ensure that it will be closed no matter what happens in the try or catch blocks. This helps in gracefully handling any database errors and ensures that the connection is properly closed, preventing any resource leaks.

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14.

You are developing a C# program. You write the following code line:int x = 6 + 4 * 4 / 2 - 1;What will be the value of the variablexafter this statement is executed?
- 13
- 19
- 20
- 14
Correct Answer

A. 13

Explanation

The value of the variable x will be 13. This is because the code line follows the order of operations (PEMDAS/BODMAS), which means that multiplication and division are performed before addition and subtraction. In this case, 4 * 4 is evaluated first, resulting in 16. Then, 16 / 2 is evaluated, resulting in 8. Finally, 6 + 8 - 1 is evaluated, resulting in 13.

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15.

You are C# developer who is developing a Windows application. You develop a new class that must be accessible to all the code packaged in the same assembly. Even the classes that are in the same assembly but do not directly or indirectly inherit from this class must be able to access the code. Any code outside the assembly should not be able to access the new class. Which access modifier should you use to declare the new class?
- Public
- Protected
- Private
- Internal
Correct Answer

A. Private

Explanation

The correct access modifier to declare the new class is "private". This means that the class will only be accessible within the same assembly and cannot be accessed by any code outside of the assembly. Even classes within the same assembly that do not directly or indirectly inherit from this class will be able to access the code.

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16.

You have completed developing a new software application. To ensure the quality of the software, you need to verify that each method or function hasproper test cases available. Which testing approach should you use?
- White-box testing
- Black-box testing
- Alpha testing
- Beta testing
Correct Answer

A. White-box testing

Explanation

To ensure the quality of the software and verify that each method or function has proper test cases available, the most appropriate testing approach would be white-box testing. This approach involves examining the internal structure and implementation of the software, allowing for thorough testing of individual components and ensuring that all paths and conditions are tested. By analyzing the code and executing test cases based on its internal logic, white-box testing helps identify any errors, bugs, or gaps in the software's functionality.

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17.

You created a class named GeoShape. You defined a method called Areain the GeoShape class. This method calculates the area of a geometric shape. You want the derived classes of GeoShapeto supersede this functionality to support the area calculation of additional geometric shapes. Whenthe method Area is invoked on a GeoShape object, the area should be calculated based on the runtime type of the GeoShape object. Which keyword should you use with the definition of the Area method in the GeoShape class?
- Abstract
- Virtual
- New
- Overrides
Correct Answer

A. Virtual

Explanation

The correct keyword to use with the definition of the Area method in the GeoShape class is "virtual". This keyword allows the derived classes of GeoShape to override the functionality of the Area method and provide their own implementation for calculating the area of additional geometric shapes. By using the "virtual" keyword, the method will be dynamically dispatched at runtime based on the actual type of the GeoShape object, ensuring that the correct area calculation is performed.

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18.

You are developing a new application that optimizes the processing of a manufacturing plant’s operations. You need to implement a data structure that works as a “buffer” for overflow capacity. When the manufacturing capacity is available, the items in the buffer need to be processed in the order in which they were added to the buffer. Which data structure should you use to implement such buffer?
- Array
- Linked list
- Stack
- Queue
Correct Answer

A. Queue

Explanation

A queue is the most suitable data structure to implement the buffer for overflow capacity in this scenario. A queue follows the First-In-First-Out (FIFO) principle, which means that the items added to the buffer first will be processed first when manufacturing capacity is available. This ensures that the items are processed in the order they were added, meeting the requirement mentioned in the question. Therefore, a queue is the correct choice for implementing the buffer in this situation.

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19.

You are developing a Web page for a medium-sized business. You want to separate the formatting and layout of the page from its content. Which of the following technologies should you use to define the formatting and layout of the page content?
- Cascading Style Sheet (CSS)
- Hypertext Markup Language (HTML)
- JavaScript
- Hypertext Transmission Protocol (HTTP)
Correct Answer

A. Cascading Style Sheet (CSS)

Explanation

CSS should be used to define the formatting and layout of the page content. CSS is a style sheet language that allows you to separate the presentation of a web page from its content. It provides a way to specify how elements should be displayed on a web page, including their size, color, font, and positioning. By using CSS, you can easily make changes to the appearance of a website without having to modify the HTML code. This separation of concerns improves the maintainability and flexibility of the web page.

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20.

You want to display an image on your Web page. This image is stored on a separate Web server but can be accessed with a public URL. Which of thefollowing HTML tags should you use to ensure that the image is displayed when the user navigates to your Web page?
- < LINK >
- < IMG >
- < A >
- < HTML>
Correct Answer

A. < IMG >

Explanation

To display an image on a web page, the correct HTML tag to use is . This tag is specifically designed for displaying images and allows you to specify the image source using the "src" attribute. By providing the public URL of the image as the value of the "src" attribute, the image will be fetched from the separate web server and displayed on the web page when the user navigates to it.

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21.

You are developing an algorithm before you write the C# program. You need to perform some calculations on a number. You develop the following flowchart for the the calculationif the input valu of n is 5, what is the output value of the variable fact according to this flowchart?
- 720
- 120
- 24
- 6
Correct Answer

A. 120

Explanation

The flowchart shows a loop that starts with the variable "fact" set to 1. It then multiplies "fact" by the value of "n" and decrements "n" by 1 in each iteration until "n" becomes 0. In this case, since the initial value of "n" is 5, the loop will run 5 times. Therefore, the output value of "fact" will be 1 * 5 * 4 * 3 * 2 * 1 = 120.

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22.

Suppose that you defined a class Scenario that defines functionality for running customized pivot transform on large data sets. You do not want the functionality of this class to be inherited into derived classes. What keyword should you use to define the Scenario class?
- Sealed
- Abstract
- Abstract
- Internal
Correct Answer

A. Sealed

Explanation

The correct answer is "sealed". The "sealed" keyword is used to prevent a class from being inherited by other classes. In this scenario, the "sealed" keyword should be used to define the Scenario class in order to restrict its functionality from being inherited into derived classes.

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23.

You are developing a C# program that needs to perform 5 iterations. You write the following code:01: int count = 0;02: while (count <= 5)03: {04: Console.WriteLine("The value of count = {0}", count);05: count++;06: }When you run the program, you notice that the loop does not iterate five times. What should you do to make sure that the loop is executed exactly fivetimes?
- Change the code in line 01 to int count = 1;
- Change the code in line 02 to: while (count == 5)
- Change the code in line 02 to while (count >= 5)
- Change the code in line 05 to ++count;
Correct Answer

A. Change the code in line 01 to int count = 1;

Explanation

The loop is not iterating five times because the initial value of count is 0. The condition in line 02 is "

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24.

You are developing a C# application. You need to decide whether to declare a class member as static. Which of the following statements is true about static members of a class?
- You can use the this keyword reference with a static method or property
- Only one copy of a static field is shared by all instances of a class.
- Static members of a class can be used only after an instance of a class is created.
- The static keyword is used to declare members that do not belong to individual objects but to a class itself.
Correct Answer

A. The static keyword is used to declare members that do not belong to individual objects but to a class itself.

Explanation

The static keyword is used to declare members that do not belong to individual objects but to a class itself. This means that static members can be accessed without creating an instance of the class. Only one copy of a static field is shared by all instances of a class, and the this keyword cannot be used with a static method or property.

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25.

You are planning to develop a new software system for your organization. You need to review the plans, models, and architecture for how the software will be implemented. Of which of the following activities should you review the output?
- Requirements analysis
- Design
- Coding
- Testing
Correct Answer

A. Design

Explanation

In order to review the plans, models, and architecture for how the software will be implemented, you should review the output of the design activity. This is because the design phase involves creating detailed specifications for how the software will be structured and function. It includes creating diagrams, flowcharts, and other visual representations of the software's architecture. By reviewing the output of the design activity, you can ensure that the plans and models align with the requirements and goals of the software system.

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26.

You are planning to develop a new software system for your organization. Someone needs to be responsible for developing system manuals and help files. Which of the following participants should you identify for this task?
- User interface designer
- Content developer
- User interface designer
- Technical writer
Correct Answer

A. Technical writer

Explanation

A technical writer should be identified for the task of developing system manuals and help files. While a user interface designer focuses on designing the interface of the software system, a content developer may be responsible for creating content for the system but not necessarily for the manuals and help files. On the other hand, a technical writer specializes in creating clear and concise documentation, making them the most suitable participant for this specific task.

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27.

Which of the following is not true about linked lists?
- A linked list does not allow random access to its items.
- A link to the head node can help you locate all the nodes in a linked list.
- The items in a linked list must be stored in contiguous memory locations.
- Linked lists are extremely fast in performing insert and delete operations.
Correct Answer

A. The items in a linked list must be stored in contiguous memory locations.

Explanation

Linked lists do not require contiguous memory locations to store their items. Each node in a linked list contains a reference to the next node, allowing the items to be stored in different memory locations. This flexibility allows for efficient insert and delete operations, as nodes can be easily rearranged by updating the references. However, this lack of contiguous memory also means that random access to items is not possible in a linked list, as each item must be accessed sequentially by following the references from one node to another.

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28.

You are developing a C# program. You write the following code:int i = 6;do{if (i == 3)break;Console.WriteLine("The value of i = {0}", i);i++;}while (i <= 5);How many times will the control enter the while loop?
- 0
- 1
- 2
- 3
Correct Answer

A. 1

Explanation

The control will enter the while loop 1 time. This is because the do-while loop executes the code block at least once before checking the condition. In this case, the value of i is initially 6, which is greater than 5, so the code block is executed once. After the code block is executed, the value of i is incremented to 7, which is not less than or equal to 5, so the loop ends.

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29.

You are C# developer who is developing a Windows application. You need to provide a common definition of a base class that can be shared by multiple derived classes. Which keyword should you use to declare the new class?
- Virtual
- Sealed
- Interface
- Abstract
Correct Answer

A. Interface

Explanation

The correct answer is interface. In C#, an interface is used to provide a common definition or contract that can be shared by multiple derived classes. It defines a set of methods, properties, and events that a class must implement. By using interfaces, you can achieve polymorphism and ensure that different classes can be used interchangeably when they implement the same interface.

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30.

You are C# developer who is developing a Windows application. You need to provide derived classes the ability to share common functionality with base classes but still define their own unique behavior. Which object-oriented programming concept should you use to accomplish this functionality?
- Encapsulation
- Abstraction
- Polymorphism
- Inheritance
Correct Answer

A. Inheritance

Explanation

Inheritance is the correct answer because it allows derived classes to inherit common functionality from base classes while still being able to define their own unique behavior. With inheritance, the derived classes can access and use the properties, methods, and fields of the base class, reducing code duplication and promoting code reuse. This concept is fundamental in object-oriented programming and helps in creating a hierarchical structure of classes, where each derived class can add or modify functionality as needed.

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31.

You are planning to develop a new software system for your organization. You need to review the system’s technical blueprint. Which of the following participants is responsible for providing the technical blueprint?
- User interface designer
- Developer
- Architect
- Technical writer
Correct Answer

A. Architect

Explanation

The architect is responsible for providing the technical blueprint of the software system. The architect is typically involved in the initial stages of the software development process and is responsible for designing the overall structure and framework of the system. They consider various technical aspects such as system requirements, scalability, security, and integration with existing systems. The technical blueprint serves as a guide for the developers and other stakeholders involved in the development process. The architect ensures that the system is designed in a way that meets the organization's needs and aligns with industry best practices.

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32.

You are developing a new application that optimizes the processing of a warehouse’s operations. When the products arrive, they are stored onwarehouse racks. To minimize the time it takes to retrieve an item, the items that arrive last are the first to go out. You need to represent the items thatarrive and leave the warehouse in a data structure. Which data structure should you use to represent this situation?
- Array
- Linked list
- Stack
- Queue
Correct Answer

A. Stack

Explanation

A stack is the most suitable data structure to represent this situation because it follows the Last-In-First-Out (LIFO) principle. When items arrive at the warehouse, they are added to the top of the stack, and when items need to be retrieved, the topmost item is the first one to be taken out. This ensures that the items that arrive last are the first to go out, as required in the scenario.

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33.

You are developing an application that uses a double dimensional array. You use the following code to declare the array:int[,] numbers = new int[,]{{ 11, 7, 50, 45, 27 },{ 18, 35, 47, 24, 12 },{ 89, 67, 84, 34, 24 },{ 67, 32, 79, 65, 10 }};Next, you refer to an array element by using the expressionnumbers[2, 3]. What will be the return value of this expression?
- 47
- 84
- 24
- 34
Correct Answer

A. 34

Explanation

The expression numbers[2, 3] refers to the element at the 2nd row and 3rd column of the double dimensional array "numbers". In the given code, the element at this position is 34. Therefore, the return value of this expression will be 34.

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34.

In your application, you are using a stack data structure to manipulate information. You need to find which data item will be processed next, but you don’t want to actually process that data item yet. Which of the following queue operations will you use?
- Pop
- Push
- Peek
- Contains
Correct Answer

A. Peek

Explanation

To find which data item will be processed next without actually processing it, the appropriate queue operation to use is "peek". The "peek" operation allows you to view the element at the front of the queue without removing it. This way, you can check the next item in the queue without modifying the queue's content.

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35.

You are developing a C# program. You write the following code:int x = 10int y = ++xint x = y++;What will be the variable zafter all the above statements are executed?
- 10
- 11
- 12
- 13
Correct Answer

A. 11

Explanation

The variable z will have a value of 11 after all the above statements are executed. In the first line, the variable x is assigned a value of 10. In the second line, the value of x is incremented by 1 and then assigned to y, so y becomes 11. In the third line, the value of y is assigned to x, and then y is incremented by 1, so x becomes 11 and y becomes 12. Therefore, the final value of z is 11.

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36.

You are developing a C# application. You create a class of the name Widget . You use some third-party libraries, one of which also contains a class of the name Widget . You need to make sure that using the Widget class in your code causes no ambiguity. Which C# keyword should you use to address this requirement?
- Namespace
- Override
- Delegate
- Class
Correct Answer

A. Namespace

Explanation

To avoid ambiguity between the Widget class in your code and the Widget class in the third-party library, you should use the C# keyword "namespace". By placing your Widget class in a separate namespace, you can differentiate it from the Widget class in the third-party library. This allows you to use the Widget class in your code without any conflicts or ambiguity.

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37.

You are assisting your colleague in solving a compiler error that his code is throwing. Following is the problematic portion of his code:try{bool success = ApplyPicardoRotation(100, 0);// additional code lines here}catch(DivideByZeroException dbze){//exception handling code}catch(NotFiniteNumberException nfne){//exception handling code}catch(ArithmeticException ae){//exception handling codewww.vceplus.com - Website designed to help IT pros advance their careers - Born to Learn}catch(OverflowException oe){//exception handling code}To remove the compilation error, which of the following ways should you suggest to rearrange the code ?
- Try { bool success = ApplyPicardoRotation(100, 0); // additional code lines here } catch(DivideByZeroException dbze) { //exception handling code } catch(ArithmeticException ae) { //exception handling code } catch(OverflowException oe) { //exception handling code }
- Try { bool success = ApplyPicardoRotation(100, 0); // additional code lines here } catch(DivideByZeroException dbze) { //exception handling code } catch(Exception e) { //exception handling code } catch(OverflowException oe) { //exception handling code }
- Try { bool success = ApplyPicardoRotation(100, 0); www.vceplus.com - Website designed to help IT pros advance their careers - Born to Learn // additional code lines here } catch(DivideByZeroException dbze) { //exception handling code } catch(NotFiniteNumberException nfne) { //exception handling code } catch(OverflowException oe) { //exception handling code } catch(ArithmeticException ae) { //exception handling code }
- Try { bool success = ApplyPicardoRotation(100, 0); // additional code lines here } catch(DivideByZeroException dbze) { //exception handling code } catch(NotFiniteNumberException nfne) { //exception handling code } catch(Exception e) { //exception handling code } catch(ArithmeticException ae) { //exception handling code }
Correct Answer

A. Try { bool success = ApplyPicardoRotation(100, 0); www.vceplus.com - Website designed to help IT pros advance their careers - Born to Learn // additional code lines here } catch(DivideByZeroException dbze) { //exception handling code } catch(NotFiniteNumberException nfne) { //exception handling code } catch(OverflowException oe) { //exception handling code } catch(ArithmeticException ae) { //exception handling code }

Explanation

The correct answer suggests rearranging the code by keeping the exception handling blocks in the order of their inheritance hierarchy. This means that the more specific exception types should be caught before the more general ones. In this case, the code should first catch the DivideByZeroException, then the NotFiniteNumberException, followed by the OverflowException, and finally the ArithmeticException. This ensures that the code handles the exceptions in the correct order and prevents any compilation errors.

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38.

Suppose that you are writing code for a class named Product. You need to make sure that the data members of the class are initialized to their correct values as soon as you create an object of the Product class. The initialization code should always be executed. What should you do?
- Create a static method in the Product class to initialize data members.
- Create a constructor in the Product class to initialize data members.
- Create a static property in the Product class to initialize data members
- Create an event in the Product class to initialize data members.
Correct Answer

A. Create a constructor in the Product class to initialize data members.

Explanation

A constructor is a special method that is automatically called when an object of a class is created. By creating a constructor in the Product class, we can ensure that the data members of the class are initialized to their correct values as soon as an object of the Product class is created. This guarantees that the initialization code will always be executed whenever an object is created, providing the desired behavior.

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39.

You are planning to develop a new software system for your organization. You need to verify that the implementation of the system matches with the requirements of the system. Which of the following activities would accomplish this requirement?
- Testing
- Design
- Release
- Requirements analysis
Correct Answer

A. Testing

Explanation

Testing is the activity that would accomplish the requirement of verifying that the implementation of the software system matches with the requirements. Testing involves executing the system and checking whether it behaves as expected and meets the specified requirements. It helps to identify any discrepancies or bugs in the system and ensures that it functions correctly. Testing is an essential part of the software development life cycle to ensure the quality and reliability of the software system.

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40.

In your application, you are using a queue data structure to manipulate information. You need to find whether a data item exists in the queue, but youdon’t want to actually process that data item yet. Which of the following queue operations will you use?
- Enqueue
- Dequeue
- Peek
- Contains
Correct Answer

A. Contains

Explanation

To find whether a data item exists in the queue without processing it, the appropriate queue operation to use is "contains". This operation allows you to check if a specific data item is present in the queue without modifying the queue or removing any elements from it.

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41.

You are developing a C# program that makes use of a singly linked list. You need to traverse all nodes of the list. Which of the following items will youneed to accomplish this requirement?
- Link to the head node
- Link to the tail node
- Data in the head node
- Data in the tail node
Correct Answer

A. Link to the head node

Explanation

To traverse all nodes of a singly linked list, you will need a link to the head node. The head node serves as the starting point of the list, and by following the links from one node to the next, you can iterate through all the nodes in the list. Without a link to the head node, you would not be able to access the first node and consequently traverse the rest of the list.

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42.

You are creating a new class named Polygon. You write the following code class Polygon : IComparable{public double Length { get; set; }public double Width { get; set; }public double GetArea(){return Length * Width;}public int CompareTo(object obj){// to be completed}}You need to complete the definition of the Compare To method to enable comparison of the Polygon objects. Which of the following code segments should you use?
- Public int CompareTo(object obj) Polygon target = (Polygon)obj; double diff = this.GetArea() - target.GetArea(); if (diff == 0) return 0; else if (diff > 0) return 1; else return -1; } { Polygon target = (Polygon)obj; double diff = this.GetArea() - target.GetArea(); if (diff == 0) return 0; else if (diff > 0) return 1; else return -1; }
- Public int CompareTo(object obj) { Polygon target = (Polygon)obj; double diff = this.GetArea() - target.GetArea(); if (diff == 0) return 1; else if (diff > 0) return -1; else return 0; }
- Public int CompareTo(object obj) { Polygon target = (Polygon)obj; if (this == target) return 0; else if (this > target) return 1; else return -1; } if (this == target) return 0; else if (this > target) return 1; else return -1; }
- Public int CompareTo(object obj) { Polygon target = (Polygon)obj; if (this == target) return 1; else if (this > target) return -1; else return 0; }
Correct Answer

A. Public int CompareTo(object obj) Polygon target = (Polygon)obj; double diff = this.GetArea() - target.GetArea(); if (diff == 0) return 0; else if (diff > 0) return 1; else return -1; } { Polygon target = (Polygon)obj; double diff = this.GetArea() - target.GetArea(); if (diff == 0) return 0; else if (diff > 0) return 1; else return -1; }

Explanation

The correct answer is the code segment:

public int CompareTo(object obj)
{
Polygon target = (Polygon)obj;
double diff = this.GetArea() - target.GetArea();
if (diff == 0)
return 0;
else if (diff > 0)
return 1;
else
return -1;
}

This code segment correctly implements the CompareTo method to enable comparison of Polygon objects based on their area. It first casts the object parameter to a Polygon object. Then, it calculates the difference in area between the current instance and the target Polygon. If the difference is zero, it returns 0 to indicate equality. If the difference is positive, it returns 1 to indicate that the current instance is greater. If the difference is negative, it returns -1 to indicate that the current instance is smaller.

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43.

You are writing code for a new method named Proces :void Draw(object o){}The code receives a parameter of type object . You need to cast this object into the type Polygon . At times, the value of o that is passed to the method might not be a valid Polygon value. You need to make sure that the code does not generate any System.InvalidCastException errorswhile doing the conversions. Which of the following lines of code should you use inside the Draw method to accomplish this goal
- Polygon p = (Polygon) o;
- Polygon p = o is Polygon;
- Polygon p = o as Polygon;
- Polygon p = (o != null) ? o as Polygon : (Polygon) o;
Correct Answer

A. Polygon p = o as Polygon;

Explanation

The correct answer is "Polygon p = o as Polygon;". This line of code uses the "as" keyword to perform a safe cast of the object "o" to the type "Polygon". If the cast is successful, the variable "p" will hold the casted value of "o" as a Polygon object. If the cast fails, the variable "p" will be assigned a null value instead of throwing a System.InvalidCastException error. This ensures that the code does not generate any casting errors and provides a safe way to handle cases where "o" may not be a valid Polygon value.

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44.

You are C# developer who is developing a Windows application. You write the following code:Object o;Later in the code, you need to assign the value in the variable oto an object of Rectangle type. You expect that at runtime the value in the variable o is compatible with the Rectangle class. However, you need to make sure that no exceptions are raised when the value is assigned. Which of the following code should you use?
- Rectangle r = (Rectangle) o;
- Rectangle r = o;
- Rectangle r = o as Rectangle;
- Rectangle r = o is Rectangle;
Correct Answer

A. Rectangle r = o is Rectangle;

Explanation

The correct code to use in this scenario is "Rectangle r = o as Rectangle;". The "as" keyword in C# performs a safe type conversion, where if the conversion is not possible, it returns null instead of throwing an exception. By using "as" in this case, if the value in the variable "o" is compatible with the Rectangle class, it will be assigned to "r". Otherwise, "r" will be assigned null.

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45.

You are developing a program that performs frequent insert and delete operations on the data. Your requirement also dictates the capability to accessprevious and next records when the user clicks the previous or next button. Which of the following data structures will best suit your requirements?
- Array
- Circular linked list
- Linked list
- Doubly linked list
Correct Answer

A. Doubly linked list

Explanation

A doubly linked list would best suit the requirements because it allows for efficient insert and delete operations, as well as easy access to previous and next records. The doubly linked list contains nodes that have references to both the previous and next nodes, enabling quick navigation in both directions. This makes it suitable for scenarios where frequent insertions, deletions, and record traversal are required.

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46.

You are reviewing a C# program. The program contains the following class:public struct Rectangle{public double Length {get; set;}public double Width { get; set; }}The program executes the following code as part of theMainmethod:Rectangle r1, r2;r1 = new Rectangle { Length = 10.0, Width = 20.0 };r2 = r1;r2.Length = 30;Console.WriteLine(r1.Length);What will be the output when this code is executed?
- 10
- 20
- 30
- 40
Correct Answer

A. 10

Explanation

The output will be 10. This is because when r2 is assigned the value of r1, it creates a copy of the struct. Therefore, modifying the Length property of r2 does not affect the original value of r1.

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47.

You are developing a sorting algorithm that uses partitioning and comparison to arrange an array of numbers in the correct order. You write a methodthat partitions the array so that the items less thanpivotgo to the left side, whereas the items greater thanpivotgo to the right side. The partitioningmethod has the following signature:static int Partition (int[] numbers, int left,int right, int pivotIndex)Which of the following algorithms should you use to sort the array using thePartitionmethod?
- Static int[] QuickSort(int[] numbers, int left, int right) { if (right > left) { int pivotIndex = left + (right - left) / 2; pivotIndex = Partition( numbers, left, right, pivotIndex); QuickSort( numbers, left, pivotIndex - 1); QuickSort( numbers, pivotIndex + 1, right); } return numbers; }
- Static int[] QuickSort(int[] numbers, int left, int right) { if (right > left) { int pivotIndex = left + (right - left) / 2; pivotIndex = Partition( numbers, left, right, pivotIndex); QuickSort( numbers, left, pivotIndex); QuickSort( numbers, pivotIndex + 1, right); } return numbers; }
- Static int[] QuickSort(int[] numbers, int left, int right) { if (right > left) { int pivotIndex = left + (right - left) / 2; pivotIndex = Partition( numbers, left, right, pivotIndex); QuickSort( numbers, left, pivotIndex - 1); QuickSort( numbers, pivotIndex, right); } return numbers; }
- Static int[] QuickSort(int[] numbers, int left, int right) { if (right > left) { int pivotIndex = left + (right - left) / 2; pivotIndex = Partition( numbers, left, right, pivotIndex); QuickSort( numbers, left, pivotIndex + 1); QuickSort( numbers, pivotIndex + 1, right); } return numbers; }
Correct Answer

A. Static int[] QuickSort(int[] numbers, int left, int right) { if (right > left) { int pivotIndex = left + (right - left) / 2; pivotIndex = Partition( numbers, left, right, pivotIndex); QuickSort( numbers, left, pivotIndex - 1); QuickSort( numbers, pivotIndex + 1, right); } return numbers; }

Explanation

The correct answer is the first option: static int[] QuickSort(int[] numbers, int left, int right). This is because the QuickSort algorithm is a commonly used algorithm for sorting arrays, and it is appropriate to use in this scenario where the partitioning method is being used. The QuickSort algorithm recursively divides the array into smaller subarrays based on a pivot element, and then sorts each subarray. In this case, the partitioning method is used to determine the pivot index, and then the QuickSort algorithm is called recursively on the left and right subarrays. This will effectively sort the array using the partitioning method.

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Current Version
Mar 21, 2023

Quiz Edited by
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Jan 12, 2017

Quiz Created by
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