Computer Programming MCQ Quiz

Reviewed by Godwin Iheuwa
Godwin Iheuwa, MS (Computer Science) |
Computer Science
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Godwin is a proficient Database Administrator currently employed at MTN Nigeria. He holds as MS in Computer Science from the University of Bedfordshire, where he specialized in Agile Methodologies and Database Administration. He also earned a Bachelor's degree in Computer Science from the University of Port Harcourt. With expertise in SQL Server Integration Services (SSIS) and SQL Server Management Studio, Godwin's knowledge and experience enhance the authority of our quizzes, ensuring accuracy and relevance in the realm of computer science.
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Computer Programming MCQ Quiz - Quiz

Our Computer Programming MCQ Quiz is meticulously designed to test and enhance your understanding of various programming concepts. Whether you're a student, a budding developer, or a seasoned coder, this quiz offers a comprehensive range of questions that cover fundamental programming languages, data structures, algorithms, and software development principles.

Dive into multiple-choice questions that challenge your knowledge of Python, Java, C++, and more. Each question is crafted to not only test your current understanding but also to expand your grasp of efficient coding practices and problem-solving techniques. This quiz is an excellent way for beginners to get acquainted with the Read morebasics of programming and for professionals to refresh their knowledge and ensure they're up to date with the latest programming trends.

Take our Computer Programming MCQ Quiz to sharpen your coding skills, prepare for job interviews, or simply enjoy the challenge of answering well-thought-out questions. With immediate feedback and explanations for each answer, you’ll have a rewarding learning experience that helps you progress in your coding journey. Join now and start testing your programming prowess!
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Computer Programming Questions and Answers

  • 1. 

    During program development, software requirements specify

    • A.

      How the program will accomplish the task

    • B.

      What the task is that the program must perform

    • C.

      How to divide the task into subtasks

    • D.

      How to test the program when it is done

    Correct Answer
    B. What the task is that the program must perform
    Explanation
    Software requirements specify what the task is that the program must perform. This means that the requirements outline the specific functionalities and objectives that the program needs to achieve. They define the desired behavior and outcomes of the program, serving as a guide for the development process. By clearly stating what the program must accomplish, the requirements help ensure that the final product meets the needs and expectations of the stakeholders.

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  • 2. 

    Of the following, if statements, which one correctly executes three instructions if the condition is true?

    • A.

      If (x < 0) a = b * 2; y = x; z = a – y;

    • B.

      { if (x < 0) a = b * 2; y = x; z = a – y; }

    • C.

      If{ (x < 0) a = b * 2; y = x; z = a – y ; }

    • D.

      If (x < 0) { a = b * 2; y = x; z = a – y; }

    Correct Answer
    D. If (x < 0) { a = b * 2; y = x; z = a – y; }
    Explanation
    The correct answer is the last statement: if (x < 0) { a = b * 2; y = x; z = a – y; }. This is because it correctly uses the if statement syntax, with the condition in parentheses followed by the code block enclosed in curly braces. The other options either have incorrect syntax or do not include the necessary curly braces to enclose all three instructions.

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  • 3. 

    Which of the sets of statements below will add 1 to x if x is positive and subtract 1 from x if x is negative but leave x alone if x is 0?

    • A.

      If (x > 0) x++; else x--;

    • B.

      If (x > 0) x++; else if (x < 0) x--;

    • C.

      If (x == 0) x = 0; else x++; x--;

    • D.

      X++; x--;

    Correct Answer
    B. If (x > 0) x++; else if (x < 0) x--;
    Explanation
    The set of statements that will add 1 to x if x is positive, subtract 1 from x if x is negative, but leave x alone if x is 0 is: if (x > 0) x++; else if (x < 0) x--;
    If x is positive (greater than 0), it will be incremented by 1.
    If x is negative (less than 0), it will be decremented by 1.
    If x is 0, none of the conditions will be met, so x will remain unchanged.
    The other sets of statements do not properly handle the case where x is 0 or might not correctly subtract 1 from x when it is negative.

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  • 4. 

    Jim currently runs a car rental dealership and wishes to write a program that allows the user to enter the temperature of the location they plan to visit and then recommend a car based on the data.  Below is a summary of the program structure Jim is looking for.         Temp greater than 80 a Convertible should be selected.         Temp  greater than 60 and less than 80 an SUV should be selected         Temp less than 60 a truck should be selected.   Jim has no trouble writing the code if the temperate is greater than 80 but gets stuck when he arrives at the second line of code which reads Temp greater than 60 and less than 80 an SUV should be selected.  What type of operator is Jim needing to use within his code?

    • A.

      &&

    • B.

      | |

    • C.

      !=

    • D.

      ==

    Correct Answer
    A. &&
    Explanation
    Jim needs to use the && (logical AND) operator within his code. The && operator allows him to combine multiple conditions and check if they are all true before executing a certain block of code. In this case, Jim wants to select an SUV if the temperature is greater than 60 and less than 80, so he needs to use the && operator to check both conditions simultaneously.

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  • 5. 

    _______ is the process of finding errors and fixing them within a program.

    • A.

      Compiling

    • B.

      Executing

    • C.

      Debugging

    • D.

      Scanning

    Correct Answer
    C. Debugging
    Explanation
    Debugging is the process of finding errors and fixing them within a program. It involves identifying and resolving issues such as logical errors, syntax errors, or runtime errors that prevent the program from working correctly. This process often requires the use of debugging tools and techniques, such as setting breakpoints, stepping through code, and analyzing variables, in order to locate and rectify the errors.

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  • 6. 

    Analyze the two “if statements” below and select which answer best summarizes each line of code.         string name1, name2; int guess, answer;   if (name1.equals(name2))         if (guess == answer)

    • A.

      The first if statement will compare the numerical value of the two names entered to see if they are equal and the second if statement will also compare the numerical values to see if they are equal

    • B.

      The first if statement will not work correctly due to string values being used, the second if statement will correctly compare the variables guess and answer

    • C.

      The first if statement will compare the two string values to see if they are equal and the second will compare the two integer values to see if they are equal.

    • D.

      The first if statement should read if (name1 == name2) in order to properly compare the values and the second if statement will compare the numerical values to see if they are equal.

    Correct Answer
    C. The first if statement will compare the two string values to see if they are equal and the second will compare the two integer values to see if they are equal.
    Explanation
    The code provided involves two separate if statements that perform different types of comparisons. The first if statement uses the "equals" method, which is typically used in programming languages like Java to compare two string objects for content equality. This means it checks if the actual data within the strings "name1" and "name2" is identical, not just if they refer to the same object. The second if statement uses the "==" operator to compare two integers, "guess" and "answer". This operator checks if the values of these integers are exactly the same, ensuring a numerical comparison. Both statements are correctly applying their respective comparison methods for strings and integers.

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  • 7. 

    Sal needs to execute a section of code ten times within a program. Compare the selection structures below and select which one meets the needs identified.

    • A.

      If-Else

    • B.

      For

    • C.

      While

    • D.

      If

    Correct Answer
    B. For
    Explanation
    The correct answer is "For" because the "For" loop is specifically designed to execute a section of code a certain number of times. In this case, Sal needs to execute the code ten times, and the "For" loop allows for easily specifying the number of iterations. The other selection structures, such as "If-Else", "While", and "If", do not have a built-in mechanism for repeating a section of code multiple times.

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  • 8. 

    Kevin has implemented a While loop within his Java program. Assess the code statement below and select which answer best summarizes the output Kevin will experience once the while statement is executed. int count = 1; while (count <=25) { System.out.println (count); Count = count –1; } System.out.println (“Done”);

    • A.

      The while loop will execute 25 times and print the numbers 1 through 25 and finish with the printing of Done.

    • B.

      The while loop will execute 25 times and print the numbers 25 down to 1 and finish with the printing of Done.

    • C.

      The while statement will not function correctly due to a missing semicolon(;) after the statement while (count <=25)

    • D.

      The while statement will execute by counting down from 1 until infinity and result in an infinite loop.

    Correct Answer
    D. The while statement will execute by counting down from 1 until infinity and result in an infinite loop.
    Explanation
    The code initializes the variable "count" to 1 and enters a while loop that will continue as long as "count" is less than or equal to 25. Inside the loop, it prints the value of "count" and then decrements "count" by 1. However, there is a typo in the code where "Count" is used instead of "count" for decrementing. As a result, "count" will always remain 1, causing an infinite loop. The program will not print any numbers or the "Done" message.

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  • 9. 

    A loop that never ends is referred to as a(n)_________.

    • A.

      While loop

    • B.

      Infinite loop

    • C.

      Recursive loop

    • D.

      ) for loop

    Correct Answer
    B. Infinite loop
    Explanation
    An infinite loop refers to a loop that continues indefinitely without ever terminating. This can occur when the loop condition is always true or when there is no exit condition specified within the loop. As a result, the loop keeps repeating its code block endlessly until it is manually interrupted or the program is terminated.

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  • 10. 

    Kim has just constructed her first for loop within the Java language.  Which of the following is not a required part of a for loop?

    • A.

      Initialization

    • B.

      Condition

    • C.

      Variable

    • D.

      Increment

    Correct Answer
    C. Variable
    Explanation
    A variable is not a required part of a for loop. The initialization, condition, and increment are the essential components of a for loop. The initialization sets the initial value of the loop control variable, the condition determines when the loop will continue executing, and the increment specifies how the loop control variable will be updated after each iteration. However, a variable is not necessary for a for loop to function properly.

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  • 11. 

    Jay is considering adding a repetition statement within his Java programming final project. Jay is unsure of the number of times each loop needs to execute.  Analyze the conditional statements below and select which statement best fits the need identified by Jay within his programming.

    • A.

      While loop

    • B.

      If-Else

    • C.

      For loop

    • D.

      Switch statement

    Correct Answer
    A. While loop
    Explanation
    Jay is considering adding a repetition statement within his Java programming final project. He is unsure of the number of times each loop needs to execute. The while loop is the best fit for this need because it allows him to repeatedly execute a block of code as long as a certain condition is true. This means that Jay can use the while loop to execute the loop until he is satisfied with the number of times it has been executed, without needing to know the exact number beforehand.

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  • 12. 

    Which command will stop an infinite loop?

    • A.

      Alt - C

    • B.

      Shift - C

    • C.

      Esc

    • D.

      Ctrl - C

    Correct Answer
    D. Ctrl - C
    Explanation
    Ctrl - C is the correct answer because it is a commonly used keyboard shortcut to interrupt or terminate a process in many operating systems and programming languages. When an infinite loop is running, pressing Ctrl - C sends a signal to the system to stop the execution of the loop and exit the program. This allows the user to regain control and prevent the program from running indefinitely.

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  • 13. 

    Score =Keyboard.readInt(); while (score !=  -1)         { System.out.println (“The score is” + score); score =Keyboard.readInt();         } USER INPUT = -1, predict what will happen after the user input is accepted into the java program.

    • A.

      The while statement will continue to ask the user to enter a score and then print out the score that has been received.

    • B.

      The while loop will execute an infinite number of times because the program statement can never be false

    • C.

      The while statement will never print the statement “The score is” because the condition present within the while will be false on the first time through.

    • D.

      The while statement will function until a value other than –1 is entered.

    Correct Answer
    D. The while statement will function until a value other than –1 is entered.
    Explanation
    In the provided Java code snippet, the program begins by reading an integer input for the variable score. It then enters a while loop that continues as long as score is not equal to -1. Inside the loop, it prints the current score and then reads another score input. When the user enters -1, the condition score != -1 becomes false, causing the loop to terminate. Therefore, the loop will continue to process and output the scores entered by the user until the user inputs -1, which stops the loop.

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  • 14. 

    Analyze the following error that was received when Scott tried to compile his Java program named average. Average.java:14: 'else' without 'if' else ^ Which of the following could have resulted in the error being generated?

    • A.

      Scott used an infinite loop within his program

    • B.

      Scott placed a semicolon at the end of an If statement

    • C.

      Scott used an incorrect looping structure

    • D.

      Scott omitted a line of code below the If statement such as a System.out.pritnln or a Keybaord.readInt();

    Correct Answer
    D. Scott omitted a line of code below the If statement such as a System.out.pritnln or a Keybaord.readInt();
    Explanation
    This error typically occurs when an if statement is incorrectly terminated with a semicolon, which causes the subsequent else statement to appear as though it isn't associated with any if statement. This mistake breaks the linkage between if and else, leading to the compiler error "else without if." This scenario is common when a programmer accidentally places a semicolon after the if condition, effectively ending the statement prematurely.

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  • 15. 

    Which keyword is used to declare a constant variable in Java?

    • A.

      Const

    • B.

      Static

    • C.

      Final

    • D.

      Immutable

    Correct Answer
    C. Final
    Explanation
    In Java, the keyword 'final' is used to declare constant variables. Once a variable is assigned a value with 'final', it cannot be changed. This contrasts with other languages that might use 'const' or similar keywords. 'Final' can also be applied to methods and classes to prevent them from being overridden or subclassed, respectively.

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  • 16. 

    What is the primary purpose of the 'super' keyword in Java?

    • A.

      To call methods of the parent class

    • B.

      To declare static methods

    • C.

      To override methods in the subclass

    • D.

      To increase the visibility of methods

    Correct Answer
    A. To call methods of the parent class
    Explanation
    The 'super' keyword in Java is primarily used to call methods and constructors of a parent class from within a subclass. This feature is useful in overridden methods where the subclass method needs to leverage or augment the parent class's implementation.

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  • 17. 

    Which of these is not an access modifier in Java?

    • A.

      Protected

    • B.

      Public

    • C.

      Private

    • D.

      Package

    Correct Answer
    D. Package
    Explanation
    In Java, the recognized access modifiers are protected, public, and private. These modifiers control the visibility of classes, methods, and variables to other classes.
    The term package is not an access modifier. However, it is commonly associated with package-private access, which is the default access level (no modifier) in Java, allowing access to classes, methods, and fields within the same package. The correct term for this access level is default access, not "package."

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  • 18. 

    What does the 'continue' statement do in a loop?

    • A.

      Terminates the loop

    • B.

      Skips the current iteration and proceeds to the next one

    • C.

      Pauses the loop execution

    • D.

      None of the above

    Correct Answer
    B. Skips the current iteration and proceeds to the next one
    Explanation
    The 'continue' statement interrupts the current loop iteration and immediately proceeds to the next iteration. This command is useful for skipping certain conditions within a loop without exiting the loop completely.

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  • 19. 

    In object-oriented programming, what does the concept of inheritance allow you to do?

    • A.

      Create a class based on another class

    • B.

      Combine multiple classes into one

    • C.

      Encrypt data within a class

    • D.

      None of the above

    Correct Answer
    A. Create a class based on another class
    Explanation
    Inheritance in object-oriented programming allows one class to inherit properties and methods from another class. This parent class is known as a superclass, and the inheriting class is called a subclass or derived class. Inheritance promotes code reusability and establishes a natural hierarchy among classes.

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  • 20. 

    What is the function of the 'throw' keyword in Java?

    • A.

      It explicitly passes control to another part of the program.

    • B.

      It is used to declare a variable.

    • C.

      It terminates the program immediately.

    • D.

      It is used to signal the occurrence of an exception.

    Correct Answer
    D. It is used to signal the occurrence of an exception.
    Explanation
    The 'throw' keyword in Java is used within a method to throw an exception. This keyword allows a method to handle an error condition by interrupting its normal execution flow and passing responsibility for handling the problem to a caller of the method. This is done by creating an instance of an exception object and handing it off to the runtime system, which looks for an appropriate exception handler to catch it. This feature is essential for implementing error handling in Java, allowing developers to manage and respond to exceptional circumstances effectively.

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Godwin Iheuwa |MS (Computer Science) |
Computer Science
Godwin is a proficient Database Administrator currently employed at MTN Nigeria. He holds as MS in Computer Science from the University of Bedfordshire, where he specialized in Agile Methodologies and Database Administration. He also earned a Bachelor's degree in Computer Science from the University of Port Harcourt. With expertise in SQL Server Integration Services (SSIS) and SQL Server Management Studio, Godwin's knowledge and experience enhance the authority of our quizzes, ensuring accuracy and relevance in the realm of computer science.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jun 18, 2024
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Godwin Iheuwa
  • Mar 31, 2010
    Quiz Created by
    Justinsmith
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