Test : Java_18

This test contains 10 questions based on Java.
Each question answered correctly awards you 1 point and each incorrect answer has a penalty of -0.25 points, no points are deducted for unattempted answers.

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You Get +1 for each correct answer and -0.25 for each incorrect answer

Time Left - minutes :seconds

Which of these method of Thread class is used to find out the priority given to a thread?

get()	ThreadPriority()
getPriority()	getThreadPriority()

C

In the following example, which class must be abstract:

abstract class X implements Y {
  // implements all but one method of Y
}

class XX extends X {
  // implements the remaining method in Y
}

Class x	Class xx
Both	None of the above

A

What will be the content of array variable table after executing the following code?

for(int i = 0; i < 3; i + +)
for(int j = 0; j < 3; j + +)
if(j = i) table[i][j] = 1;
else table[i][j] = 0;

0 0 0 0 0 0 0 0 0	1 0 0 1 1 0 1 1 1
1 0 0 0 1 0 0 0 1	0 0 1 0 1 0 1 0 0

C

Which of these interface is not a part of Java?s collection framework?

List	Set
SortedMap	SortedList

D

SortedList is not a part of collection framework.

Which of these keywords is used by a class to use an interface defined previously?

import	Import
implememnts	Implememnts

C

Which of these method wakes up all the threads?

wakeAll()	notify()
start()	notifyAll()

D

What is the output of this program?

 class newthread extends Thread {
 Thread t;
 String name;
 newthread(String threadname) {
     name = threadname;
     t = new Thread(this,name);
     t.start();
 }
 public void run() {
        }
 
    }
    class multithreaded_programing {
        public static void main(String args[]) {
     newthread obj1 =   new newthread("one");
     newthread obj2 =  new newthread("two");
            try {
                 System.out.print(obj1.t.equals(obj2.t));
            }
            catch(Exception e) {
     System.out.print("Main thread interrupted");
            }
        }
    }

true	false

B

Which of these is a super class of all exceptional type classes?

String	RuntimeExceptions
Throwable	Cachable

C

What is the value stored in x in following lines of code? int x, y, z; x = 0; y = 1; x = y = z = 8;

0	1
9	8

D

Which of these is correct way of inheriting class A by class B?

class B + class A {}	class B inherits class A {}
class B extends A {}	class B extends class A {}

C

Finish Test