Java Programming - Java Package And Interface Questions and Answers

1. Which of these keywords is used to define interfaces in Java?

[A] interface

[B] Interface

[C] intf

[D] Intf

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2. Which of these can be used to fully abstract a class from its implementation?

[A] Objects

[B] Packages

[C] Interfaces

[D] None of the Mentioned.

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3. Which of these keywords is used to define interfaces in Java?

[A] interface

[B] Interface

[C] intf

[D] Intf

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4. Which of these keywords is used to define interfaces in Java?

[A] interface

[B] Interface

[C] intf

[D] Intf

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5. Which of these can be used to fully abstract a class from its implementation?

[A] Objects

[B] Packages

[C] Interfaces

[D] None of the Mentioned.

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6. Which of these access specifiers can be used for an interface?

[A] Public

[B] Protected

[C] private

[D] All of the mentioned

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7. Which of these keywords is used by a class to use an interface defined previously?

[A] import

[B] Import

[C] implements

[D] Implements

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8. Which of the following is correct way of implementing an interface salary by class manager?

[A] class manager extends salary {}

[B] class manager implements salary {}

[C] class manager imports salary {}

[D] None of the mentioned.

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9. Which of the following package stores all the standard java classes?

[A] lang

[B] java

[C] util

[D] java.packages

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10.

Which of the following is incorrect statement about packages?

[A] Interfaces specifies what class must do but not how it does.

[B] Interfaces are specified public if they are to be accessed by any code in the program.

[C] All variables in interface are implicitly final and static.

[D] All variables are static and methods are public if interface is defined pubic

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Java Programming - Java Package And Interface Questions and Answers

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