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Q:

What will happen when introduce the interface of classes in a run-time polymorphic hierarchy?

A) Separation of interface from implementation B) Merging of interface from implementation
C) Separation of interface from debugging D) None of the mentioned
 
Answer & Explanation Answer: A) Separation of interface from implementation

Explanation:
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Q:

Where does the standard exception classes are grouped?

A) namespace std B) error
C) catch D) none of these
 
Answer & Explanation Answer: A) namespace std

Explanation:

:As these are standard exceptions, they need to be defined in the standard block, So it is defined under namespace std.

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Q:

What will happen when an exception is not processed?

A) It will eat up lot of memory and program size B) Terminate the program
C) Crash the compiler D) None of the mentioned
 
Answer & Explanation Answer: A) It will eat up lot of memory and program size

Explanation:

As in the case of not using an exception, it will remain useless in the program and increase the code complexity.

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Q:

Why is it expensive to use objects for exception?

A) Exception object is created only if an error actually happens B) Because of execution time
C) Memory space involved in creating an exception object D) None of the mentioned
 
Answer & Explanation Answer: A) Exception object is created only if an error actually happens

Explanation:

If an error occurs in program, then only exception object is created otherwise, It will not be created. So it’s expensive to use in the program.

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Q:

Which operator is used in catch-all handler?

A) ellipses operator B) ternary operator
C) string operator D) unary operator
 
Answer & Explanation Answer: A) ellipses operator

Explanation:

The ellipses operator can be represented as (…).

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Q:

What is meant by exception specification?

A) A function is limited to throwing only a specified list of exceptions. B) A catch can catch all types of exceptions.
C) A function can throw any type of exceptions. D) none of the mentioned
 
Answer & Explanation Answer: A) A function is limited to throwing only a specified list of exceptions.

Explanation:

C++ provides a mechanism to ensure that a given function is limited to throwing only a specified list of exceptions. It is called as exception specification.

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Q:

How to handle error in the destructor?

A) throwing B) terminate
C) both a & b D) none of the mentioned
 
Answer & Explanation Answer: B) terminate

Explanation:

It will not throw an exception from the destructor but it will the process by using terminate() function.

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Q:

What are the operators available in dynamic memory allocation?

A) new B) delete
C) compare D) both a & b
 
Answer & Explanation Answer: D) both a & b

Explanation:

new and delete operators are mainly used to allocate and deallocate
during runtime.

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