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IT Interview Exam Questions: JAVA 4 (IT Campus Placement)

Subject: JAVA 4

Part 4: List for questions and answers of JAVA


Q1. The method cant be overridden

a) final

b) abstract

c) public

d) private


Q2. Hot java is

a) web browser

b) java version

c) IDE

d) none


Q3. javah stands for

a) compiler

b) Interpreter

c) Header file

d) debugger


Q4. Main method parameter has which type of data type

a) String

b) Int

c) char

d) double


Q5. How many keywords are available in java

a) 48

b) 35

c) 32

d) 52


Q6. Smallest individual unit in java program is known as

a) String

b) Literal

c) Token

d) operator 


Q7. What is return type of execute() method?

a) Action forward

b) void

c) String

d) int


Q8. A thread becomes runnable when you call

a) start()

b) run()

c) init()

d) none


Q9. struts work on

a) model 1

b) model2(MVC)

c) none of these

d) model3


Q10. Hibernate is ?

a) Object oriented mapping

b) database

c) java API

d) java compiler


Q11. tool used to execute java code

a) javac

b) java

c) javap

d) javal


Q12. single line comment start with

a) /*

b) //

c) /

d) none


Q13. process of writing the state of object into byte stream

a) Deserialisation

b) Externlisation

c) serialisation

d) print 


Q14. marker interface

a) having body

b) having no body

c) both

d) none


Q15. Choose one marker interface

a) serializable

b) iterator

c) collection

d) none


Q16. What allows the programmer to destroy an object x?

a) Only the garbage collection system can destroy an object

b) X.delete

c) X.destroy

d) none


Q17. Which statement is true?

a) Objects that can be reached from a live thread will never be garbage collected

b) Programs will not run out of memory

c) Objects that will never again be used are eligible for garbage collection

d) Objects that are referred to by other objects will never be garbage collected


Q18. Which statement is true?

a) All objects that are eligible for garbage collection will be garbage collected by the garbage collector

b Objects with at least one reference will never be garbage collected

c) Objects from a class with the finalize() method overridden will never be garbage collected

d) Objects instantiated within anonymous inner classes are placed in the garbage collectible heap


Q19. Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object?

a) java.lang.String

b) java.lang.StringBuffer

c) java.lang.Double

d) java.lang.Character 


Q20. Which interface does java.util.Hashtable implement?

a) Java.util.Map

b) Java.util.List

c) Java.util.Hashtable

d) None 


Part 4: List for questions and answers of JAVA


Q1. Answer: a


Q2. Answer: a


Q3. Answer: c


Q4. Answer: a


Q5. Answer: a


Q6. Answer: c


Q7. Answer: a


Q8. Answer: a


Q9. Answer: c


Q10. Answer: a


Q11. Answer: b


Q12. Answer: a


Q13. Answer:


Q14. Answer: b


Q15. Answer: a


Q16. Answer: a


Q17. Answer: a


Q18. Answer: d


Q19. Answer: b


Q20. Answer: a