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Test: Operator Overloading - 1 - Back-End Programming MCQ


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10 Questions MCQ Test - Test: Operator Overloading - 1

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Test: Operator Overloading - 1 - Question 1

While overloading binary operators using member function, it requires ___ argument/s.

Test: Operator Overloading - 1 - Question 2

Which of the following operators cannot be overloaded

Detailed Solution for Test: Operator Overloading - 1 - Question 2

See What are the operators that cannot be overloaded in C++?

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Test: Operator Overloading - 1 - Question 3

Scope resolution operator is used______ .

Test: Operator Overloading - 1 - Question 4

Which of the following operators should be preferred to overload as a global function rather than a member method?

Detailed Solution for Test: Operator Overloading - 1 - Question 4

cout is an object of ostream class which is a compiler defined class. When we do "cout << obj" where obj is an object of our class, the compiler first looks for an operator function in ostream, then it looks for a global function. One way to overload insertion operator is to modify ostream class which may not be a good idea. So we make a global method. Following is an example.


Test: Operator Overloading - 1 - Question 5

Which of the following is not a casting operator in CPP?

Test: Operator Overloading - 1 - Question 6

Predict the output

Detailed Solution for Test: Operator Overloading - 1 - Question 6

Note that the class B has as conversion operator overloaded, so an object of B can be converted to that of A. Also, class A has a constructor which can be called with single integer argument, so an int can be converted to A.

Test: Operator Overloading - 1 - Question 7

An operator function is created using _____________ keyword.

Test: Operator Overloading - 1 - Question 8

Predict the output?

Detailed Solution for Test: Operator Overloading - 1 - Question 8

Consider the following statement
    Test *ptr = new Test;  
There are actually two things that happen in the above statement--memory allocation and object construction; the new keyword is responsible for both. One step in the process is to call operator new in order to allocate memory; the other step is to actually invoke the constructor. Operator new only allows us to change the memory allocation method, but does not do anything with the constructor calling method. Keyword new is responsible for calling the constructor, not operator new.

Test: Operator Overloading - 1 - Question 9

When overloading unary operators using Friend function,it requires_____ argument/s.

Test: Operator Overloading - 1 - Question 10

Which of the following operator functions cannot be global, i.e., must be a member function.

Detailed Solution for Test: Operator Overloading - 1 - Question 10

new and delete can be global, see following example.

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