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