C++ Multiple Choice Questions And Answers - Set 2

C++ multiple choice and objective type questions with answers and explanations.

1) 3.4E - 38 is equivalent to ?

1. 3.4 x 10 x 38
2. 3.4 x 38
3. 3.4 x 10^-38
4. None of these

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Answer = C 
Explanation:No Explanation

2) A floating point number contains......?

1. Both integral and fractional part
2. Fractional part only
3. Integral part only
4. None of these

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Answer = A
Explanation: Floating point constants can have any sign +ve or -ve and can be

3) Which statement is most appropriate for C++ language ?

1. Type Less language
2. Statically types Language
3. Dynamically typed language
4. Both B and C

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Answer = B
Explanation: It is statically types language because all the types and type related information in the program are statically resolved by the compiler at compile time.

4)Keyword used for Dynamic method resolution ?

1. abstract
2. dynamic
3. virtual
4. typeid

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Answer = C
Explanation: virtual indicates that the virtual method will be resolved at runtime i.e the method resolution is dynamic.

5) Which of the following is not a feature of C++ ?

1. Operator overloading
2. Namespaces
3. Inheritance
4. Reflection

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Answer = D
Explanation:Reflection requires runtime suppott, which is not available in C++, because it is a native language.

6) The term STL stands for ?

1. Simple Template Library
2. Static Template Library
3. Single Type Based Library
4. Standard Template Library

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Answer = D
Explanation: No Explanation

7) What is the implicit pointer that is passed as the first argument for nonstatic member functions ?

1. self pointer
2. std::auto_ptr pointer
3. myself pointer
4. this pointer

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Answer = D 
Explanation: No Explanation

8) What is the right way to declare a copy constructor of a class if the name of class is X ?

1. X(const X* arg)
2. X( const X& arg)
3. X(X arg)
4. X(X* arg)

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Answer = B
Explanation: The copy constructor takes a const reference to the class type as the argument.

9) Which of the following operator can not be overloaded ?

1. Scope resolution operator
2. Arrow operator
3. Equality operator
4. Assignment operator

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Answer = A
Explanation: All the three operators can be overloaded except ::(scope resolution operator).

10) How do we declare an interface class ?

1. By declaring the class as interface with keyword interface
2. By making all the methods abstract using the keyword abstract in class
3. By making all the methods pure virtual in class
4. It is not possible to create interface classes in c++

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Answer = C
Explanation: C++ does not support interface classes directly as in java

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