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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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Filed Under: C++

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:

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:

Where does the exceptions are used?

A) Exceptions are used when postconditions of a function cannot be satisfied. B) Exceptions are used when postconditions of a function can be satisfied.
C) To preserve the program D) none of these
 
Answer & Explanation Answer: B) Exceptions are used when postconditions of a function can be satisfied.

Explanation:
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Q:

How do define the user-defined exceptions?

A) inheriting and overriding exception class functionality. B) overriding class functioality.
C) inheriting class functionality D) none of the mentioned
 
Answer & Explanation Answer: A) inheriting and overriding exception class functionality.

Explanation:
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Q:

How many types of constructor are there in C++?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: C) 3

Explanation:

There are three types of constructor in C++. They are Default constructor, Parameterized constructor, Copy constructor.

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Q:

What does inheriatance allows you to do?

A) create a class B) access methods
C) create a hierarchy of classes D) None of the mentioned
 
Answer & Explanation Answer: C) create a hierarchy of classes

Explanation:
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Q:

How many ways of reusing are there in class hierarchy?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:

Class hierarchies promote reuse in two ways. They are code sharing and interface sharing.

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Filed Under: C++