Object Oriented Programming Practice Test 2

1. Destructor calls ________________ (C++)

Are made at end of program only

Can be implicit or explicit

Are only explicit

Are only implicit

2. Which among the following is possible way to overload constructor?

Define default constructor, and 2 other parameterized constructors with same signature

Define default constructor, zero argument constructor and 1 parameter constructor

Define default constructor, 1 parameter constructor and 2 parameter constructor

Define 2 default constructors

3. The copy constructors can be used to ________

Copy an object so that it can be passed to another primitive type variable

Copy an object for type casting

Copy an object so that it can be passed to a function

Copy an object so that it can be passed to a class

4. Copy constructor is a constructor which ________________

Creates an object by copying values from any other object of same class

Creates an object by copying values from another object of another class

Creates an object by copying values from first object created for that class

Creates an object by initializing it with another previously created object of same class

5. Which among the following helps to create a temporary instance?

Implicit call to a parameterized constructor

Explicit call to a constructor

Implicit call to a default constructor

Explicit call to a copy constructor

6. Which specifier applies only to the constructors?

Implicit

Protected

Explicit

Public

7. Which among the following is true for destructors?

Destructors are overloaded in derived classes

Destructors can’t be overloaded

Destructors can be define more than one time

Destructors can be overloaded

8. Choose the correct sequence of destructors being called for the following code.

class A{   };
class B{   };
class C: public A, public B{   };

~C(), ~B(), ~A()

~A(), ~C(), ~B()

~B(), ~C(), ~A()

~A(), ~B(), ~C()

9. When is the constructor called for an object?

As soon as class is created

As soon as object is created

As soon as class is derived

As soon as overloading is required

10. What is the sequence of destructors call?

Revere of the order of constructor call

According to the priority

Same order as that of the constructors call

Random order