Question 1

Which of the following are true about interfaces.

Accepted Answer

A)  Methods declared in interfaces are implicitly private.
B)  Variables declared in interfaces are implicitly public, static, and final.
C)  An interface contains any number of method definitions.
D)  The keyword implements indicate that an interface inherits from another.

Question 2

Which of these classes is related to all the exceptions that cannot be caught?

Accepted Answer

A)  Error
B)  Exception
C)  None of these
D)  a & b

Question 3

Which of these is used as default for a member of a class if no access specifier is used for it?

Accepted Answer

A)  private
B)  public
C)  public, within its own package
D)  protected

Question 4

The code within the ----------- block will always be executed whether or not an exception is thrown.

Accepted Answer

A)  try..catch
B)  finally
C)  throw
D)  throws

Question 5

Which of these is a mechanism for naming and visibility control of a class and its content?

Accepted Answer

A)  Object
B)  Packages
C)  Interfaces
D)  None of the Mentioned

Question 6

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

Accepted Answer

A)  Public
B)  Protected
C)  private
D)  All of the mentioned A

Question 7

Which of these method of class String is used to obtain length of String object?

Accepted Answer

A)  get() 
B)  Sizeof() 
C)  lengthof() 
D)  length()

Question 8

Which of these classes is related to all the exceptions that can be caught by using catch?

Accepted Answer

A)  Error
B)  Exception
C)  None of these
D)  a & b

Question 9

The keyword used to create a package is

Accepted Answer

A)  import
B)  package
C)  classpath
D)  public B

Question 10

Which of the following is correct way of importing an entire package 'pkg'?

Accepted Answer

A)  import pkg.
B)  Import pkg.
C)  import pkg.*
D)  Import pkg.*

Question 11

Which of these keywords is not a part of exception handling?

Accepted Answer

A)  try
B)  finally
C)  thrown
D)  catch C

Question 12

Which of these keywords is used to manually throw an exception?

Accepted Answer

A)  try
B)  finally
C)  throw
D)  catch

Question 13

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

Accepted Answer

A)  class B + class A {}
B)  class B inherits class A {}
C)  class B extends A {}
D)  class B extends class A {}

Question 14

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

Accepted Answer

A)  class Manager extends salary {}
B)  class Manager implements salary {}
C)  class Manager imports salary {}
D)  None of the mentioned

Question 15

Which of the following is incorrect statement about packages?

Accepted Answer

A)  Package defines a namespace in which classes are stored.
B)  A package can contain other package within it.
C)  Java uses file system directories to store packages.
D)  A package can be renamed without renaming the directory in which the classes are stored.

Question 16

Which of these keywords must be used to monitor for exceptions?

Accepted Answer

A)  try..catch
B)  finally
C)  throw
D)  throws

Question 17

A primitive data type can be passed as an argument into a method

Accepted Answer

A)  By value
B)  by reference
C)  both a & b
D)  none of these

Question 18

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

Accepted Answer

A)  Objects
B)  Packages
C)  Interfaces
D)  None of the Mentione

Question 19

Which of these method of class String is used to extract a single character from a String object?

Accepted Answer

A)  CHARAT() 
B)  chatat() 
C)  charAt() 
D)  ChatAt()

Question 20

Which of this access specifies can be used for a class so that its objects can be created by a different class in another package?

Accepted Answer

A)  Public
B)  Protected
C)  No Modifier
D)  All of the mentioned

Exam 3: Java Programming: Data Types, Inheritance, Interfaces, Packages, and Exception Handling

Which of the following are true about interfaces.

Correct AnswerverifiedShow Answer

Which of these classes is related to all the exceptions that cannot be caught?

Correct AnswerverifiedShow Answer

Which of these is used as default for a member of a class if no access specifier is used for it?

Correct AnswerverifiedShow Answer

The code within the ----------- block will always be executed whether or not an exception is thrown.

Correct AnswerverifiedShow Answer

Which of these is a mechanism for naming and visibility control of a class and its content?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

Which of these method of class String is used to obtain length of String object?

Correct AnswerverifiedShow Answer

Which of these classes is related to all the exceptions that can be caught by using catch?

Correct AnswerverifiedShow Answer

The keyword used to create a package is

Correct AnswerverifiedB

Which of the following is correct way of importing an entire package 'pkg'?

Correct AnswerverifiedShow Answer

Which of these keywords is not a part of exception handling?

Correct AnswerverifiedC

Which of these keywords is used to manually throw an exception?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is incorrect statement about packages?

Correct AnswerverifiedShow Answer

Which of these keywords must be used to monitor for exceptions?

Correct AnswerverifiedShow Answer

A primitive data type can be passed as an argument into a method

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of these method of class String is used to extract a single character from a String object?

Correct AnswerverifiedShow Answer

Which of this access specifies can be used for a class so that its objects can be created by a different class in another package?

Correct AnswerverifiedShow Answer

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A

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C

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