Programming In C++ MCQs Set-1

This section contains more frequently asked Programming In C++ MCQs in the various University Level and Competitive Examinations.

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

1. The address of a variable temp of type float is

• *temp
• &temp
• float& temp
• float temp&

B. &temp

2. What is the output of the following code char symbol[3]={‘a’,‘b’,‘c’}; for (int index=0; index<3; index++) cout << symbol [index];

• a b c
• “abc”
• abc
• ‘abc’

C. abc

3. The process of building new classes from existing one is called ______.

• Polymorphism
• Structure
• Inheritance
• Cascading

C. Inheritance

4. If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access

• protected and public data only in C and B.
• protected and public data only in C.
• private data in A and B.
• protected data in A and B.

D. protected data in A and B.

5. If the variable count exceeds 100, a single statement that prints “Too many” is

• if (count<100) cout << “Too many”;
• if (count>100) cout >> “Too many”;
• if (count>100) cout << “Too many”;
• None of these

C. if (count>100) cout << “Too many”;

6. Usually a pure virtual function

• has complete function body.
• will never be called.
• will be called only to delete an object.
• is defined only in derived class.

D. is defined only in derived class.

7. To perform stream I/O with disk files in C++, you should

• open and close files as in procedural languages
• use classes derived from ios
• use C language library functions to read and write data.
• include the IOSTREAM.H header file.

B. use classes derived from ios

8. Overloading the function operator

• requires a class with an overloaded operator.
• requires a class with an overloaded [ ] operator.
• allows you to create objects that act syntactically like functions
• usually make use of a constructor that takes arguments.

A. requires a class with an overloaded operator.

9. If x = y,5 = 2 then x ∧ y equals________. (where ∧ is a bitwise XOR operator)

• 00000111 
• 10000010
• 10100000 
• 11001000

A. 00000111