Data types and type modifiers — C++ MCQs

1. Which of the following is a fundamental data type in C++?
(A) int
(B) string
(C) vector
(D) class

2. Which type modifier can be used to increase the size of an integer?
(A) short
(B) long
(C) signed
(D) unsigned

3. Which of the following is a floating-point data type in C++?
(A) char
(B) double
(C) bool
(D) int

4. What is the size of a bool data type in most C++ implementations?
(A) 1 byte
(B) 2 bytes
(C) 4 bytes
(D) 8 bytes

5. Which of the following is not a valid type modifier in C++?
(A) signed
(B) volatile
(C) unsigned
(D) long

6. Which type would you use to store large positive integers only?
(A) signed int
(B) unsigned int
(C) float
(D) char

7. What is the default type of a floating-point literal like 3.14 in C++?
(A) float
(B) int
(C) long double
(D) double

8. Which of the following is a modifier used with char in C++?
(A) signed
(B) unsigned
(C) Both A and B
(D) long

9. Which type is used to store very large floating-point numbers in C++?
(A) float
(B) double
(C) long double
(D) int

10. Which of the following is not a valid data type in C++?
(A) short int
(B) long long int
(C) unsigned char
(D) long float

11. What is the size of the int data type in most C++ implementations?
(A) 1 byte
(B) 2 bytes
(C) 4 bytes
(D) 8 bytes

12. How many bytes does a char occupy in C++?
(A) 1 byte
(B) 2 bytes
(C) 4 bytes
(D) 8 bytes

13. What is the typical size of a float in C++?
(A) 2 bytes
(B) 16 bytes
(C) 8 bytes
(D) 4 bytes

14. How many bytes does a double usually occupy in C++?
(A) 4 bytes
(B) 8 bytes
(C) 12 bytes
(D) 16 bytes

15. What is the size of a long in most 64-bit systems?
(A) 4 bytes
(B) 8 bytes
(C) 2 bytes
(D) 16 bytes

16. How many bytes does a bool data type occupy in C++?
(A) 1 byte
(B) 2 bytes
(C) 4 bytes
(D) 8 bytes

17. What is the typical size of a short int in C++?
(A) 1 byte
(B) 2 bytes
(C) 4 bytes
(D) 8 bytes

18. How many bytes does a long double occupy in most compilers?
(A) 8 bytes
(B) 12 bytes
(C) 16 bytes
(D) 32 bytes

19. What is the size of an unsigned int in most 64-bit C++ systems?
(A) 2 bytes
(B) 1 byte
(C) 8 bytes
(D) 4 bytes

20. How many bytes does a long long int occupy in C++?
(A) 4 bytes
(B) 8 bytes
(C) 16 bytes
(D) 2 bytes