Object Oriented Programming using C++ Questions and Answers – Nested Class

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

1. Which among the following best describes a nested class?
a) Class inside a class
b) Class inside a function
c) Class inside a package
d) Class inside a structure
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2. Which feature of OOP reduces the use of nested classes?
a) Encapsulation
b) Inheritance
c) Binding
d) Abstraction
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3. How many categories are nested classes divided into?
a) 2
b) 3
c) 4
d) 5
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4. Non-static nested classes have access to _____________ from enclosing class.
a) Private members
b) Protected members
c) Public members
d) All the members
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5. Static nested classes doesn’t have access to _________________ from enclosing class.
a) Private members
b) Protected members
c) Public members
d) Any other members
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6. The nested class can be declared ___________________
a) Public
b) Private
c) Protected
d) Public, Protected, Private or Package private
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7. Use of nested class ____________ encapsulation.
a) Increases
b) Decreases
c) Doesn’t affect
d) Slightly decreases
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8. Which among the following is the correct advantage/disadvantage of nested classes?
a) Makes the code more complex
b) Makes the code unreadable
c) Makes the code efficient and readable
d) Makes the code multithreaded
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9. How to access static nested classes?
a) OuterClass.StaticNestedClass
b) OuterClass->StaticNestedClass
c) OuterClass(StaticNestedClass)
d) OuterClass[StaticNestedClass]
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10. A nested class can have its own static members.
a) True
b) False
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11. How to create object of the inner class?
a) OuterClass.InnerClass innerObject = outerObject.new InnerClass();
b) OuterClass.InnerClass innerObject = new InnerClass();
c) InnerClass innerObject = outerObject.new InnerClass();
d) OuterClass.InnerClass = outerObject.new InnerClass();
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12. What will be the output of the following code?

public class Test
{
    public int a=0;
    class innerClass
    {
	public int a=1;
	void innermethod(int x)
	{
	    System.out.println(“value of x = ” + x);
	    System.out.println(“value of this.x = ” + this.x);
	    System.out.println(“value of Test.this.x = ” + Test.T=this.x);
	}
    }
}	
public static void main( String args[] )
{
	Test t=new Test();
	Test.innerClass im=t.new innerClass();
	im.innermethod(55);
}

a)

  value of x = 55
  value of this.x = 0
  value of Test.this.x = 1

b)

  value of x = 1
  value of this.x = 0
  value of Test.this.x = 55

c)

  value of x = 55
  value of this.x = 1
  value of Test.this.x = 0

d)

  value of x = 0
  value of this.x = 55
  value of Test.this.x = 1

13. Instance of inner class can exist only _______________ enclosing class.
a) Within
b) Outside
c) Private to
d) Public to
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14. If a declaration of a member in inner class has the same name as that in the outer class, then ________________ enclosing scope.
a) Outer declaration shadows inner declaration in
b) Inner declaration shadows outer declaration in
c) Declaration gives compile time error
d) Declaration gives runtime error
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15. A static nested class is _____________ class in behavior that is nested in another _________ class.
a) Top level, top level
b) Top level, low level
c) Low level, top level
d) Low level, low level
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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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