Object Oriented Programming using C++ Questions and Answers – Assigning Objects

This set of Object Oriented Programming (OOPs) using C++ Multiple Choice Questions & Answers (MCQs) focuses on “Assigning Objects”.

1. When value of an object is assigned to another object ________________
a) It becomes invalid statement
b) Its values gets copied into another object
c) Its values gets address of the existing values
d) The compiler doesn’t execute that statement
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2. If an object is created and another object is assigned to it, then ________________
a) Copy constructor is called to copy the values
b) Object is copied directly to the object
c) Reference to another object is created
d) The new object is initialized to null values
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3. How the argument passed to a function get initialized?
a) Assigned using copy constructor at time of passing
b) Copied directly
c) Uses addresses always
d) Doesn’t get initialized
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4. Predict the output of the program.

class A
{
	public int i;
};
void main()
{
	A x;
	A y=x;
	x.i=10;
	y.i=20;
	y.i++;
	y.i=20;
	cout&l;<tx.i;
}

a) 10
b) 20
c) 21
d) 0
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5. If programmer doesn’t define any copy assignment operator then ____________________
a) Compiler gives an error
b) Program fails at run time
c) Compiler gives an implicit definition
d) Compiler can’t copy the member values
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6. Declaring a copy constructor doesn’t suppresses the compiler generated copy assignment operator.
a) True
b) False
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7. In copy constructor definition, if non const values are accepted only ________
a) Only const objects will be accepted
b) Only non – const objects are accepted
c) Only const members will not get copied
d) Compiler generates an error
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8. How many objects can be assigned to a single address?
a) Only 1
b) At most 7
c) At most 3
d) As many as required
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9. Use of assignment operator ____________________
a) Changes its use, when used at declaration and in normal assignment
b) Doesn’t changes its use, whatever the syntax might be
c) Assignment takes place in declaration and assignment syntax
d) Doesn’t work in normal syntax, but only with declaration
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10. If more than one object refer to the same address, any changes made __________
a) Can be made visible to specific objects
b) Will be specific to one object only
c) From any object will be visible in all
d) Doesn’t changes the values of all objects
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11. How to make more than one object refer to the same object?
a) Initialize it to null
b) Initialize the object with another at declaration
c) Use constructor to create new object
d) Assign the address directly
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12. We can assign ______________________
a) Value of one reference variable to another
b) Value of any object to another
c) Value of any type to any object
d) Value of non – reference to another reference
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13. Assigning reference to an object _________________
a) Will create another copy of the object
b) Will create two different copies of the object
c) Will not create any other copy of the object
d) Will not refer to the object
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14. Which among the following is true?
a) We can use direct assignment for any object
b) We can use direct assignment only for different class objects
c) We must not use direct assignment
d) We can use direct assignment to same class objects
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15. Assigning objects takes place while passing the arguments.
a) True
b) False
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Sanfoundry Global Education & Learning Series – Object Oriented Programming (OOPs).

To practice all areas of Object Oriented Programming (OOPs) using C++, here is complete set of 1000+ Multiple Choice Questions and Answers.

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