CSCI 490 Quiz 1: Key Concepts in Computation and Programming

1. How can PI be calculated using Monte Carlo method?

By simply multiplying the diameter of a circle by a constant value to get an accurate estimate of PI.

By drawing a square and circle, and then randomly choosing coordinates within the square to calculate the value of PI.

By conducting a series of mathematical equations involving the square root and sine functions to estimate the value of PI.

The correct method involves uniformly scattering objects over a square inscribed within a circle, counting objects inside the circle, and then multiplying the ratio by 4 to estimate the value of PI.

Explanation

The correct method involves uniformly scattering objects over a square inscribed within a circle, counting objects inside the circle, and then multiplying the ratio by 4 to estimate the value of PI.

2. How to do numerical integration (know the formula and be able to describe)?

3. One common method for numerical integration is to use the trapezoidal rule to estimate the integral.

2. The formula for numerical integration involves taking the derivative of the function being integrated.

1. Numerical integration is used to calculate the area under a curve only when the function is continuous.

The correct answer provides a detailed explanation of numerical integration, its applications, and reasons for use. The incorrect answers are misleading as they do not accurately describe the process of numerical integration or the methods involved.

Explanation

The correct answer provides a detailed explanation of numerical integration, its applications, and reasons for use. The incorrect answers are misleading as they do not accurately describe the process of numerical integration or the methods involved.

3. What is a time series?

A pattern of data points with no correlation to time intervals.

A sequence of random numbers collected over a period of time.

A set of non-numerical data points measured at irregular time intervals.

A time series is a sequence of data points measured at successive, usually uniform, time intervals.

A time series is a sequence of numerical data points in successive order, usually occurring in uniform intervals. It is not random numbers or non-numerical data, and it has a correlation to time intervals.

Explanation

A time series is a sequence of numerical data points in successive order, usually occurring in uniform intervals. It is not random numbers or non-numerical data, and it has a correlation to time intervals.

4. Discuss forecasting accuracy?

Forecasting accuracy only involves formal statistical methods and does not consider judgemental methods.

Forecasting accuracy does not take into account risk and uncertainty, as it aims to predict exact future outcomes.

Forecasting accuracy refers to the ability to predict the past accurately.

5. What are the key components in C++/Object-Oriented Programming?

(Write the definitionWrite an exampleBe able to identify each of the 5 terms)

Variables, Pointers, Loops, Conditionals

Data types, Functions, Algorithms, Debugging

File handling, Memory management, Exception handling, Templates

C++ and Object-Oriented Programming involve the concepts of classes, inheritance, composition, polymorphism, abstract classes, and interfaces, which are essential for organizing and structuring code in a modular and reusable way.

Explanation

C++ and Object-Oriented Programming involve the concepts of classes, inheritance, composition, polymorphism, abstract classes, and interfaces, which are essential for organizing and structuring code in a modular and reusable way.

6. What is a class in C++?

A class is a blueprint that holds both data and functions, while an object is an instance of that class.

A class is a data type used to store single values in C++.

A class is a keyword used to define variables in C++.

A class is a function in C++ with specific properties.

In C++, a class is a user-defined data type that holds both data and functions. It serves as a blueprint for creating objects, which are instances of the class.

Explanation

In C++, a class is a user-defined data type that holds both data and functions. It serves as a blueprint for creating objects, which are instances of the class.

7. What is Composition in C++?

Composition is a type of inheritance in C++.

Composition is a relationship between variables within the same class.

Composition allows an object to exist independently without the containing object.

Composition in C++ is a specific form of object composition which describes a 'has-a' relationship between objects. It differs from inheritance by focusing on the relationship between objects rather than classes.

Explanation

Composition in C++ is a specific form of object composition which describes a 'has-a' relationship between objects. It differs from inheritance by focusing on the relationship between objects rather than classes.

8. What is an Abstract Class in C++?

An abstract class is a class that can only contain private members.

An abstract class is a class that cannot be instantiated.

An abstract class is a class that does not allow inheritance.

An abstract class in C++ is designed to be used as a base class and contains at least one pure virtual function. It cannot be instantiated on its own, and it requires derived classes to implement its virtual methods.

Explanation

An abstract class in C++ is designed to be used as a base class and contains at least one pure virtual function. It cannot be instantiated on its own, and it requires derived classes to implement its virtual methods.

9. Define: Interface in C++

An interface is a defined set of methods that a class implements to enable interaction between systems or components.

A type of computer virus.

The programming language used to write code.

A way to connect hardware devices together.

In C++, an interface refers to a list of methods that a class must implement.

Explanation

In C++, an interface refers to a list of methods that a class must implement.

10. How to read a sequential file (what do we INCLUDE?)

Binary Files

Indexed Files

Random Files

11. How to read a sequential file (What statements are necessary?)

Text Files

Binary Files

Random Access Files

The correct answer is 'Sequential Files' because sequential file techniques involve reading and writing files in a sequential manner using specific commands. Random Access Files and Binary Files involve different methods of file manipulation, while Text Files can be used for storing data but do not specifically refer to the process of reading a sequential file.

Explanation

The correct answer is 'Sequential Files' because sequential file techniques involve reading and writing files in a sequential manner using specific commands. Random Access Files and Binary Files involve different methods of file manipulation, while Text Files can be used for storing data but do not specifically refer to the process of reading a sequential file.