Variables and Data Types in C++

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Question 1

Which of the following is a valid variable name in C++?

  • 3var

  • var_name

  • int

  • float#

Question 2

What is the size of an int in C++ compilers?

  • 2 bytes

  • 4 bytes

  • 8 bytes

  • Compiler dependent

Question 3

Which keyword is used in C++ to declare a variable that cannot be changed?

  • constant

  • const

  • final

  • immutable

Question 4

What data type should be used to store a single character?

  • string

  • char

  • int

  • bool

Question 5

Which of the following is NOT a primitive data type in C++?

  • double

  • class

  • bool

  • char

Question 6

Which type modifier can be used to store only positive integers?

  • Unsiged

  • signed

  • volatile

  • const

Question 7

Which data type is used to store true or false values?

  • int

  • char

  • bool

  • float

Question 8

What will be the output of the following code?

C++ 
int main() {
    bool a = true;
    bool b = false;
    int c = a + b + 10;
    cout << c;
}


  • 10

  • 11

  • true

  • Error: Cannot add boolean and integer.

Question 9

Which type qualifier is used to tell the compiler that a variable’s value may change unexpectedly?

  • const

  • static

  • volatile

  • mutable

Question 10

What type of data does std::string hold?

  • characters

  • floating point numbers

  • integers

  • Boolean Values

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