SUN+-+310-025+TopBible.pdf

310-025

int I= 1;

System.out.println(a[I]); }

What will be printed?

Compilation Error in Line 2

Compilation Error in line 4

Exception in Line 4

Will print true

Will print false

Will print null

Ans:F

void Add(Integer b)

{

int I= b.intvalue();

I+=3;

b= new Integer(I)

}

What will be printed out?

Will print 13

Will print 10

Compilation Error in Line 4 ?. implicit conversion to Integer to

public static void main(String args[])

{

String a =args[1];

String b =args[2];

String c =args[3];

}

}

if you will execute java text cat dog sheep what will be the value of

the 'c' ?

cat

dog

sheep

Compilation Error

Exception will occur

Ans:E

c=f;

}

which will return true?. Select all

f.equls(d)

c==f

c==d

c.equls(f)

Ans:B,D

5. public static void main(String args[])

{

String s;

System.out.println("s = "+s);

6. class s extends Thread{int j=0;

public void run() {

try{Thread.sleep(5000);}

catch(Exception e){}

j=100;

}

public static void main(String args[])

{

s t1=new s();

t1.start();

You have to suspend the main when the thread starts and resume it after

the value of 'j' is set to 100

You have to interrupt the main thread

Ans:B

7. What will happen if you compile/run this code?

1: public class Q1 implements Runnable

2: {

9:

10: public static void main(String[] args)

11: {

12: Q1 a = new Q1();

13: Thread t=new Thread(a);

14: t.start();}

15: }

A) Compilation error at line 1

B) Runtime exception at line 13.

C) Compilation error at line 14

D) Prints "Before start of Thread "

After Start of Thread

public void run()

for(int i=0;i<10;i++)

System.out.println(addX()+""+addY());

}

public static void main(String args[])

{

s run=new s();

Thread t1=new Thread(run);

Thread t2=new Thread(run);

t1.start();

t2.start();

Compile time Error There is no start method

Will print but not exactly in an order (eg: 123124 3……)

Ans:C

9.

class s implements Runnable{

int x=0,y=0;

synchronized void addX(){x++; }

synchronized void addY(){y++; }

void addXY(){x++;y++;}

boolean check() { return (x>y)? true:false;)

{ s run=new s();

Thread t1=new Thread(run);

Thread t2=new Thread(run);

t1.start();

t2.start();

}

}

If this methods are called in which order the check will return true?

Select all that apply

call addX() and addY() simultaneously for number of times in run()

call addY() and addX() simultaneously for number of times in run()

all addXY() for number of times in run()

Ans:B,C

Ans:B

11. Which two methods may not directly cause a thread to stop

executing?

A. sleep();

B. stop();

C. yield();

D. wait();

E. notify();

F. notifyAll()

G. synchronized()

Ans:EF

How will you create an instance of Inner Class out side? Select 2

Outer o= new Outer();Inner a= new o.Inner();

Ans:CD

13. What a static inner class can access select one