Self Test Skills
- 1. Who is known as father of Java Programming Language ?
- A.James Gosling (Answer)
- B.M. P Java
- C.Charel Babbage
- D.Blais Pascal
- 2. In java control statements break, continue, return, try-catch-finally and assert belongs to ?
- A.Selection statements
- B.Loop Statements
- C.Transfer statements. (Answer)
- D.Pause Statement
- 3. Which provides runtime environment for java byte code to be executed ?
- A.JDK
- B.JVM (Answer)
- C.JRE
- D.JAVAC
- 4. What is byte code in Java ?
- A.Code generated by a Java compiler. (Answer)
- B.Code generated by a Java Virtual Machine
- C.Name of Java source code file
- D.Block of code written inside a class
- 5. Which of the following are not Java keywords ?
- A.double
- B.switch
- C.then (Answer)
- D.instanceof
- 6. Which of these have highest precedence ?
- A.() (Answer)
- B.++
- C.*
- D.>>
- 7. Which of these is returned by operator '&' ?
- A.Integer
- B.Character (Answer)
- C.Boolean
- D.Float
- 8. Data type long literals are appended by
- A.Uppercase L
- B.Lowercase L
- C.Long
- D.Both A and B (Answer)
- 9. Which variables are created when an object is created with the use of the keyword 'new' and destroyed when the object is destroyed ?
- A.Local variables
- B.Instance variables (Answer)
- C.Class Variables
- D.Static variables
- 10. Java language was initially called as
- A.Sumatra
- B.J++
- C.Oak (Answer)
- D.Pine
- 11. What is garbage collection in the context of Java ?
- A.Java deletes all unused java files on the system.
- B.Memory used by the object with no reference is automatically reclaimed. (Answer)
- C.The JVM cleans output of Java program with error.
- D.Any unused package in a program automatically gets deleted.
- 12. Which one is a template for creating different objects ?
- A.An Array
- B.A class (Answer)
- C.Interface
- D.Method
- 13. Which symbol is used to contain the values of automatically initialized arrays ?
- A.Brackets
- B.Braces (Answer)
- C.Parentheses
- D.Comma
- 14. Which one is true about a constructor ?
- A.A constructor must have the same name as the class it is declared within.
- B.A constructor is used to create objects.
- C.A constructor may be declared private.
- D.All of the above (Answer)
- 15. Which of these operators is used to allocate memory to array variable in Java ?
- A.alloc
- B.malloc
- C.new malloc
- D.new (Answer)
- 16. Which of these is not a bitwise operator ?
- A. &' Operator
- B. &=' Operator
- C. |=' Operator
- D. <=’ Operator Answer)
- 17. Which of these is returned by Greater Than, Less Than and Equal To (i.e Relational) operator ?
- A.Fload
- B.Integer
- C.Boolean (Answer)
- D.Double
- 18. Which statement transfer execution to different parts of your code based on the value of an expression ?
- A.If
- B.Switch (Answer)
- C.Nested If
- D.If Else If
- 19. Modulus operator (%) can be applied to which of these ?
- A.Integers
- B.Floating - point numbers
- C.Both A and B (Answer)
- D.None of These
- 20. What feature of OOP has a super-class sub-class concept ?
- A.Hierarchical inheritance (Answer)
- B.Single inheritance
- C.Multiple inheritances
- D.Multilevel inheritance
- 21. Which of the following are not the methods of the Thread class ?
- A.yield()
- B.sleep(long msec)
- C.go() (Answer)
- D.stop()
- 22. Division operator has ____ precedence over multiplication operator
- A.Heighest
- B.Least
- C.Equal (Answer)
- D.None of These
- 23. What is the full form of JVM ?
- A.Java Very Large Machine
- B.Java Verified Machine
- C.Java Very Small Machine
- D.Java Virtual Machine (Answer)
- 24. In Java code, the line that begins with /* and ends with */ is known as?
- A.Multiline comment (Answer)
- B.Single line comment
- C.Both A and B
- D.None of these
- 25. Which of the following are not Java modifiers ?
- A.public
- B.private
- C.friendly (Answer)
- D.transient
