C++ MCQs with answers Page - 167

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P

Praveen Singh • 36.81K Points
Coach 

Q. What is the output of the following code?

int x = 10;
cout << ++x * x++;

  • (A) 110
  • (B) 121
  • (C) 120
  • (D) Undefined behavior

R

Ram Sharma • 193.86K Points
Coach 

Q. Which of the following is the correct syntax for defining a pure virtual function in C++?

  • (A) virtual void show() = 0;
  • (B) void show() = 0;
  • (C) virtual void show();
  • (D) abstract void show();

S

Shiva Ram • 30.44K Points
Instructor I 

Q. Which of the following correctly describes a friend function in C++?

  • (A) A function that is a member of two different classes
  • (B) A function that can access private members of a class
  • (C) A function defined in multiple classes
  • (D) A function that can only be used with objects

R

Ram Sharma • 193.86K Points
Coach 

Q. Which header file is required to use the std::vector container in C++?

  • (A) <vector>
  • (B) <array>
  • (C) <list>
  • (D) <set>

A

Admin • 36.96K Points
Coach 

Q. Which of the following statements about constructors in C++ is false?

  • (A) A constructor has the same name as the class.
  • (B) A constructor does not have a return type.
  • (C) A constructor can be private.
  • (D) A constructor must be explicitly called when creating an object.

V

Vijay Sangwan • 28.62K Points
Instructor II 

Q. Which keyword is used to declare a constant variable in C++?

  • (A) define
  • (B) const
  • (C) static
  • (D) constant

R

Rakesh Kumar • 28.44K Points
Instructor II 

Q. What is the default access specifier for class members in C++?

  • (A) public
  • (B) private
  • (C) protected
  • (D) None of the above

G

Gopal Sharma • 38.32K Points
Coach 

Q. Which function is used to release dynamically allocated memory in C++?

  • (A) free()
  • (B) delete
  • (C) release()
  • (D) dispose()

P

Praveen Singh • 36.81K Points
Coach 

Q. Which operator is used to resolve ambiguity in multiple inheritance?

  • (A) ::
  • (B) ->
  • (C) .*
  • (D) None of the above

R

Ram Sharma • 193.86K Points
Coach 

Q. Which of the following is an example of function overloading in C++?

  • (A) Using multiple functions with the same name but different parameters
  • (B) Using a function with the same name in a derived class
  • (C) Using a function inside a loop
  • (D) Defining a function inside a structure

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