Quiz Discussion

Does Java support multiple level inheritance?

• 1]

  True

• 2]

  False

All classes in Java are inherited from which class?

• 1]

  java.lang.class

• 2]

  java.class.inherited

• 3]

  java.class.object

• 4]

  java.lang.object

What would be the result if a class extends two interfaces and both have a method with same name and signature? Lets assume that the class is not implementing that method.

• 1]

  Runtime error

• 2]

  Compile time error

• 3]

  Code runs successfully

• 4]

  First called method is executed successfully

 A class member declared protected becomes a member of subclass of which type?

• 1]

  public member

• 2]

  private member

• 3]

  protected member

• 4]

  static member

Which of these is correct way of inheriting class A by class B?

• 1]

  class B + class A {}

• 2]

  class B inherits class A {}

• 3]

  class B extends A {}

• 4]

  class B extends class A {}

Which of this keyword must be used to inherit a class?

• 1]

  super

• 2]

  this

• 3]

  extent

• 4]

  extends

Which of the following is used in implementing inheritance through class?

• 1]

  inherited

• 2]

  using

• 3]

  extends

• 4]

  implements

Which of the following is used for implementing inheritance through an interface?

• 1]

  inherited

• 2]

  using

• 3]

  extends

• 4]

  implements

In order to restrict a variable of a class from inheriting to subclass, how variable should be declared?

• 1]

  Protected

• 2]

  Private

• 3]

  Public

• 4]

  Static

Using which of the following, multiple inheritance in Java can be implemented?

• 1]

  Interfaces

• 2]

  Multithreading

• 3]

  Protected methods

• 4]

  Private methods