Exceptions Java - MCQ set 1 (25 questions, 50 marks)

Q1 - Q5, 5 EASY level difficulty questions 1 mark each. 1 * 5 = 5 marks 


1. Exception is a class/interface/abstract class/other?

a.Class
b.Interface
c.Abstract class
d.Other


2. Exception is found in which package in java

a.java.lang
b.java.util
c.java.io
d.java


3. Exception was introduced in which java version

a.Java 1
b.Java 2
c.Java 3
d.Java 4


4. Which of these class is highest in hierarchy in java

a.java.lang.Exception
b.java.lang.Error
c.java.lang.Throwable
d.java.lang.Object


5. What keyword is used to explicitly raise a exception?

a.catch
b.throw
c.throws
d.raise



Q6 - Q20, 15 MEDIUM level difficulty questions 2 mark each. 2 * 15 = 30 marks


6. What block is always executed, independently of a exception being raised?

a.throws
b.finally
c.catch
d.throw


7. Exception and Error are direct subclasses of?

a.BaseException
b.Throwable
c.Object
d.RuntimeException


8. FileNotFoundException

a.Is a subclass/extends IOException
b.Is a Compile time exception
c.Found in java.io package
d.All


9. IOException

a.Found in java.io package
b.Is a Compile time exception
c.Is a subclass/extends Exception
d.All


10. Which of these are java.lang.Error in exception handling in java

a.VirtualMachineError
b.IOError
c.AssertionError
d.ThreadDeath
e.All


11. In which condition will the finally block will not be executed?

a.When some Error occurs
b.When Exception is raised
c.When System.Exit(1) is called
d.In all the cases


12. What type of Exceptions can be ignored at compile time?

a.Runtime
b.Checked
c.Both
d.None


13. What will be output of following exception handling code in java -
    
    
    

a.ade
b.adb
c.bcde
d.adbe


14. What will be output of following program -
    
    

a.runtime exception
b.program will compile
c.program won't compile
d.


15. What will happen in this program -
    
    
    

a.StackFlowoverError
b.compile timeError
c.StackOverflowException
d.StackOverflowError


16. What is invalid statements for automatic resource management in java?

a.Allows us to catch more than one exception in one catch block
b.We could separate different exceptions using pipe ( | )
c.Increases developer efforts of writing multiple catch blocks.
d.None


17. multiple catch syntax was introduced in ?

a.java 5
b.java 6
c.java 7
d.java 8


18. Which of these points will be valid If superclass method does not throw any exception

a.overridden method of subclass can throw any RuntimeException
b.overridden method of subclass cannot throw any checked exception
c.overridden method of subclass may not throw any exception.
d.All


19. What will happen when catch and finally block both return value?

a.method will return value returned by finally block
b.method will return value returned by catch block
c.finally block won't execute
d.None


20. can a method be overloaded on basis of exceptions ?

a.Will produce runtime error
b.Will produce compilation error - ambiguity error
c.Yes a method be overloaded on basis of exceptions.
d.None



Q21 - Q25, 5 HARD level difficulty questions 3 mark each.       3 * 5 = 15 marks


21. What will be output of following program -
    
    

a.runtime exception
b.method return -> finally
c.method return -> catch
d.compile timeError


22. What will be output of following program -
    
    

a.abc
b.abcd
c.runtime exception
d.compile timeError


23. Which is valid about java.lang.Exceptions?

a.The class Exception and all its subclasses that are not also subclasses of RuntimeException are checkedexceptions
b.The class Error and all its subclasses are unchecked exceptions
c.The class RuntimeException and all its subclasses are unchecked exceptions
d.All


24. What is disadvantage/invalid about try-with-resource

a.introduced in java 7
b.we need not to write explicit code for closing file
c.Using multiple resources inside Try-with-resources is also allowed
d.None


25. FileInputStream implements which interface for closing file automatically in java7?

a.java.lang.AutoClose
b.java.lang.CloseAutomatically
c.java.lang.AutoCloseable
d.java.lang.Closeable

Quiz 1 - Correct answers

EASY
1) a
2) a
3) a
4) d
5) b

MEDIUM
6) b
7) b
8) d
9) d
10) e

11) c
12) a
13) b
14) c
15) d
16) c
17) c
18) d
19) a
20) c

HARD
21) b
22) c
23) d
24) d
25) c

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Exceptions Java - MCQ set 2 (25 questions, 50 marks)

Q1 - Q5, 5 EASY level difficulty questions 1 mark each. 1 * 5 = 5 marks 


1. What type of Exceptions can NOT be ignored at compile time?

a.Checked Exceptions
b.Unchecked Exceptions
c.Uncompiled Exceptions
d.Error


2. java.lang.NullPointerException is a

a.Error
b.runtime exception
c.Compile time exception
d.None


3. What will be output of following program -
   
   

a.compile timeError
b.UserDefinedException will be thrown
c.UserDefinedException will be thrown and end will be present in output
d.None


4. Which of these is valid code snippet in exception handling in java?

a. catch{ }
b. finally{ }
c. try{ }finally{ }
d. try{ }


5. Which of these will be invalid declaration

a.try-catch block.
b.
c.try-catch-finally block.
d.catch-finally block.



Q6 - Q20, 15 MEDIUM level difficulty questions 2 mark each. 2 * 15 = 30 marks


6. What will be output of following program -
   
   

a.runtime exception
b.compilation error
c.superClass method
d.SubClass method


7. What will be output of following exception handling code in java -
   
   
   

a.SubClass method
b.compilation error
c.runtime exception
d.superClass method


8. What will be output of following exception handling program -
   
   

a.after calling m()
b.runtime exception
c.program won't compile
d.None


9. What will be output of following exception handling code in java -
   
   

a.superClass method
b.runtime exception
c.compilation error
d.SubClass method


10. What will be output of following exception handling program -
    
    

a.superClass method
b.runtime exception
c.SubClass method
d.compilation error


11. What will be output of following exception handling code in java -
    
    

a.superClass method
b.SubClass method
c.runtime exception
d.None of these


12. If superclass method throws unchecked exception then overridden method of subclass can throw

a.Only subclasses of exception thrown by superclass method
b.Can't throw any exception
c.Any checked exception
d.Any runtime exception


13. What will be output of following program -
    
    

a.runtime exception
b.superClass method
c.compilation error
d.SubClass method


14. If superclass method throws checked exception than

a.overridden method of subclass can declare any RuntimeException
b.overridden method of subclass can declare narrower checked exception
c.overridden method of subclass cannot throw broader checked exception
d.All


15. Which of these is not a one of the exception handling keyword?

a.finally
b.exception
c.try
d.catch

e.throw


16. What is invalid about java.lang.Error in java?

a.Errors are abnormal conditions in application
b.Error indicates some serious problems that our application should not try to catch
c.Error is unchecked Exception
d.Error is a subclass of Throwable


17. Which of these not a Error?

a.VirtualMachineError
b.ClassNotFoundError
c.OutOfMemoryError
d.IOError


18. Which is invalid about throws in Exception handling in java?

a.throws can propagate exception to calling method
b.throws can be used to throw multiple exception at time.
c.throws is used inside method to throw exception
d.None of these


19. What is true about exception handling keyword throw in java

a.throw is a keyword
b.throw can be used to throw only one exception at time.
c.throw is used inside method
d.All


20. Automatic resource management was introduced in which java version?

a.java 5
b.java 6
c.java 7
d.java 8



Q21 - Q25, 5 HARD level difficulty questions 3 mark each.       3 * 5 = 15 marks


21. Which of these is not a good exception handling practice?

a.Throw exceptions when the method cannot handle the exception, and more importantly, must be handled by the caller
b.log the exception and bubble it
c.Bubble the exception if the method cannot handle it.
d.Throw the exception right away


22. Which are valid statements in Exception handling in java?

a.Java exception handling allows us to use multiple catch block.
b.Exception class handled in starting catch block must be subclass of Exception class handled in following catch blocks
c.Either one of the multiple catch block will handle exception at time
d.All


23. Which is invalid statement in Exception handling in java?

a.finally block can't throw exception
b.try block can throw exception
c.catch block can throw exception
d.finally block can throw exception


24. Which of these exceptions are propagated automatically in java?

a.IOException
b.NullPointerException
c.ClassNotFoundException
d.SQLException


25. Which of these exceptions are always needed to be manually propagated?

a.Error
b.unchecked exceptions
c.checked exceptions
d.None

Quiz 2 - Correct answers

EASY
1) a
2) b
3) b
4) c
5) d

MEDIUM
6) d
7) b
8) b
9) d
10) d

11) b
12) d
13) c
14) d
15) b
16) c
17) b
18) c
19) d
20) c

HARD
21) b
22) d
23) a
24) b
25) c