C++ Online Quiz

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Following quiz provides Multiple Choice Questions (MCQs) related to C++ Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - A constructor can be virtual.

Answer : B

Explaination

The purpose of the constructor cannot be overridden in the derived class hence constructor cannot be a virtual.

Q 2 - Choose the respective delete operator usage for the expression ‘ptr=new int[100]’.

A - delete ptr;

B - delete ptr[];

C - delete[] ptr;

D - []delete ptr;

Answer : C

Explaination

Q 3 - Operators sizeof and ?:

A - Both can be overloaded

B - Both cannot be overloaded

C - Only sizeof can be overloaded

D - Only ?: can be overloaded

Answer : B

Explaination

Both the mentioned operators cannot be overloaded.

Q 4 - How can we make an class act as an interface in C++?

A - By only providing all the functions as virtual functions in the class.

B - Defining the class following with the keyword virtual

C - Defining the class following with the keyword interface

D - Defining the class following with the keyword abstract

Answer : A

Explaination

There are no keywords in C++ such as abstract and interface.

Q 5 - What is the full form of RTTI.

A - Runtime type identification

B - Runtime template identification

C - Robust Template Type Inheritance

D - None of the above.

Answer : A

Explaination

Q 6 - With respective to streams >> (operator) is called as

A - Insertion operator

B - Extraction operator

C - Right shift operator

D - Left shift operator

Answer : B

Explaination

It extracts the data from stream into variables.

Q 7 - i) Exception handling technically provides multi branching.

ii) Exception handling can be mimicked using ‘goto’ construct.

A - Only (i) is true

B - Only (ii) is true

C - Both (i) & (ii) are true

D - Both (i) && (ii) are false

Answer : A

Explaination

goto just does the unconditional branching.

Q 8 - What is the size of ‘int’?

D - Compiler dependent

Answer : D

Explaination

The size of ‘int’ depends upon the complier i.e. whether it is a 16 bit or 32 bit.

Q 9 - Identify the C++ compiler of Linux

Answer : B

Explaination

g++ is GNU C++ compiler for linux. Borland and vc++ (Microsoft visual c++) for windows.

Q 10 - What is the built in library function to compare two strings?

A - string_cmp()

D - str_compare()

Answer : B

Explaination

strcmp() is the built in function from “string.h” to compare two strings. Returns 0 if both are same strings. Returns -1 if first < second string. Returns 1 first > second.

cpp_questions_answers.htm

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