Today's Java Quiz

This quiz comprises of very basic level of java concept questions. See how much you score out of 10. 

Note : Answers to each question is given at the end.

1. What is base class for Exception?

• inner class
• Throwable
• Error
• run time exception

2. Which is related to garbage collection in java?

• Final
• Finally
• Finalize
• Try/Catch

3. String s = new String("Radar");

   How many objects are created in this case?

• one
• two
• three
• four

4. ArrayList is a

• interface
• Object
• Class
• none

5. Which of the following is synchronized?

• Vector
• ArrayList
• HashSet

6. for(;;) will result in

• 1
• run time exception
• infinite loop
• compile time exception

7. A .class file in java consists of

• plain code
• class definition
• group of objects
• bytecode

8. Which one is a run time polymorphism?

• method overloading
• method overriding
• inheritence
• encapsulation

9. The wrapping up of data & function into a single unit(class) is called

• abstraction
• polymorphism
• serialization
• encapsulation

10. IOException is an example of:

• runtime exception
• compile time exception
• error
• none

Answers: 

1-Throwable    2-Finalize    3-two   4-class   5-vector   6- infinite loop   7-bytecode

8-method overriding   9-encapsulation   10-compile time exception


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