Operator Overloading Questions and Answers

Q: If an arithmetic assignment operator is overloaded in C++ programming the result :

The result goes in the object to the left of the operator.Arithmetic assignment operators such as += and -= modify their left operand. When += is overloaded as a member function, a += b is called as a.operator+=(b): the object on the left is the one that calls the function, and the function changes that object's own data.The object on the right is only read. The operator may also return a reference to the left object so that assignments can be chained, but returning a result is not required, and the result is stored in the left object whether or not anything is returned.

Q: To overload an operator................. keyword must be used along with the operator to be overloaded.

The keyword is operator.An overloaded operator is defined as a function whose name is the keyword operator followed by the symbol being overloaded. For example, Complex operator+(const Complex &other) const; declares how + works for a Complex class, and the compiler then translates a + b into a call to that function.'Over' and 'Overload' are not C++ keywords at all. void is a keyword, but it names the empty return type and has nothing to do with overloading operators.

If an arithmetic assignment operator is overloaded in C++ programming the result :

A.Goes in the object to the right of the operator
B.Goes in the object to the left of the operator
C.Must be returned
D.Goes in the object to the left of the operator is a member

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: B

The result goes in the object to the left of the operator.

Arithmetic assignment operators such as += and -= modify their left operand. When += is overloaded as a member function, a += b is called as a.operator+=(b): the object on the left is the one that calls the function, and the function changes that object's own data.

The object on the right is only read. The operator may also return a reference to the left object so that assignments can be chained, but returning a result is not required, and the result is stored in the left object whether or not anything is returned.

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In C++/C operators such as............ cannot be overloaded.

A.+
B.+ +
C.: :
D.= =

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: C

The operator that cannot be overloaded is ::, the scope resolution operator.

C++ allows most operators to be given new meanings for user-defined types, but a few are fixed by the language: the scope resolution operator ::, the member access operator ., the pointer-to-member operator .*, the conditional operator ?: and sizeof. These work on names and types at compile time rather than on values, so overloading them would make the language ambiguous.

The other options, +, ++ and ==, are among the operators most commonly overloaded, for example to add, increment or compare objects of a class.

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To overload an operator................. keyword must be used along with the operator to be overloaded.

A.Over
B.Overload
C.Void
D.Operator

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: D

The keyword is operator.

An overloaded operator is defined as a function whose name is the keyword operator followed by the symbol being overloaded. For example, Complex operator+(const Complex &other) const; declares how + works for a Complex class, and the compiler then translates a + b into a call to that function.

'Over' and 'Overload' are not C++ keywords at all. void is a keyword, but it names the empty return type and has nothing to do with overloading operators.

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Operator Overloading Questions and Answers

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