C++ Basic Concepts MCQs
This article will cover some basic concepts of C++ through multiple-choice questions. These questions are designed to test your understanding of fundamental C++ topics, including data types, operators, control flow, and functions.
Let's test your knowledge!
1. Which of the following is NOT a valid C++ data type?
a. int b. float c. string d. char e. boolean
2. What is the output of the following code snippet?
int x = 5;
int y = 10;
cout << x + y;
a. 5 b. 10 c. 15 d. 20 e. None of the above
3. Which of the following operators is used to assign a value to a variable?
a. = b. == c. + d. - e. *
4. What is the purpose of the "if" statement in C++?
a. To execute a block of code only if a condition is true. b. To create a loop that repeats a block of code. c. To define a function. d. To declare a variable. e. To terminate a program.
5. Which of the following loops will execute a block of code a fixed number of times?
a. while loop b. for loop c. do-while loop d. switch statement e. None of the above
6. What is the difference between a function declaration and a function definition?
a. A function declaration specifies the function's return type and parameters, while a function definition includes the actual code that will be executed. b. A function declaration includes the actual code, while a function definition only specifies the return type and parameters. c. There is no difference between a function declaration and a function definition. d. A function declaration is used to call a function, while a function definition is used to define the function. e. None of the above
7. Which of the following keywords is used to define a constant variable in C++?
a. const b. static c. volatile d. extern e. auto
8. What is the purpose of the "main" function in C++?
a. The main function is the entry point of a C++ program. b. The main function is responsible for defining variables. c. The main function is used to create objects. d. The main function is responsible for handling user input. e. None of the above
9. What is the difference between a "class" and a "struct" in C++?
a. A class is a blueprint for creating objects, while a struct is a data structure. b. A struct is a blueprint for creating objects, while a class is a data structure. c. A class and a struct are the same thing. d. A class is used to create objects, while a struct is used to create functions. e. None of the above
10. What is the purpose of the "new" operator in C++?
a. The "new" operator is used to dynamically allocate memory for an object. b. The "new" operator is used to create a new function. c. The "new" operator is used to declare a variable. d. The "new" operator is used to terminate a program. e. None of the above
Answer Key:
- e
- c
- a
- a
- b
- a
- a
- a
- a
- a
Understanding these basic concepts is crucial for learning and mastering C++. You can find further information and practice exercises on various online platforms and books.