What will be printed as the output of the following program?
public class testincr
{ public static void main(String args[]) { int i = 0; i = i++ + i; System.out.println("I = " +i); } }
public class testincr
{ public static void main(String args[]) { int i = 0; i = i++ + i; System.out.println("I = " +i); } }
Anonymous Quiz
19%
0
48%
1
10%
2
10%
3
14%
Compile time error
Which statement is not true in java language?
Anonymous Quiz
9%
A public member of a class can be accessed in all the packages.
52%
A private member of a class cannot be accessed by the methods of the same class.
35%
A private member of a class cannot be accessed from its derived class.
4%
A protected member of a class can be accessed from its derived class.
0%
None of the above.
To prevent any method from overriding, we declare the method as,
Anonymous Quiz
21%
Static
8%
Const
38%
Final
21%
Abstract
13%
None of these
Which one of the following is not true?
Anonymous Quiz
8%
A class containing abstract methods is called an abstract class.
17%
Abstract methods should be implemented in the derived class.
33%
An abstract class cannot have non-abstract methods.
29%
A class must be qualified as ‘abstract’ class, if it contains one abstract method.
13%
None of these
The fields in an interface are implicitly specified as,
Anonymous Quiz
15%
static only
4%
Protected
15%
Private
58%
Both static and final
8%
None of the above
public class testmeth
{
static int i = 1; public static void main(String args[]) { System.out.println(i+” , “); m(i); System.out.println(i); } public void m(int i) { i += 2; } }
{
static int i = 1; public static void main(String args[]) { System.out.println(i+” , “); m(i); System.out.println(i); } public void m(int i) { i += 2; } }
Anonymous Quiz
25%
1,3
25%
3,1
15%
1,1
15%
1,0
20%
None of the above
Which of the following is not true?
Anonymous Quiz
12%
An interface can extend another interface.
28%
A class which is implementing an interface must implement all the methods of the interface.
40%
An interface can implement another interface.
16%
An interface is a solution for multiple inheritance in java
4%
None of the above
public class Program
{
public static void main(String[] args) { int x=3,y=5,z=10; System.out.println(++z+y-y+z+x++); } }
{
public static void main(String[] args) { int x=3,y=5,z=10; System.out.println(++z+y-y+z+x++); } }
Anonymous Quiz
26%
24
17%
23
22%
20
35%
25
Which of the following is true?
Anonymous Quiz
4%
A finally block is executed before the catch block but after the try block.
21%
A finally block is executed, only after the catch block is executed.
58%
A finally block is executed whether an exception is thrown or not.
8%
A finally block is executed, only if an exception occurs.
8%
None of the above
public class Program
{
public static void main(String[] args) {
Program p=new Program();
p.start();
}
void start(){
long[] a={3,4,5};
long[] b=method(a);
System.out.println(a[0]+a[1]+a[2]);
System.out.println(b[0]+b[1]+b[2]);
}
long[] method(long[] c){
c[1]=7;
return c;
}
}
A) 12
15
B) 15
12
C) 12
12
D) 15
15
{
public static void main(String[] args) {
Program p=new Program();
p.start();
}
void start(){
long[] a={3,4,5};
long[] b=method(a);
System.out.println(a[0]+a[1]+a[2]);
System.out.println(b[0]+b[1]+b[2]);
}
long[] method(long[] c){
c[1]=7;
return c;
}
}
A) 12
15
B) 15
12
C) 12
12
D) 15
15
public class Program
{
public static void main(String[] args) {
int index=0;
boolean flag=true;
boolean reg1=false,reg2;
reg2=(flag |((index++)==0));
reg2=(reg1|(index+=2)>0);
System .out.println(index );
}
}
A) 0
B) 1
C) 2
D) 3
{
public static void main(String[] args) {
int index=0;
boolean flag=true;
boolean reg1=false,reg2;
reg2=(flag |((index++)==0));
reg2=(reg1|(index+=2)>0);
System .out.println(index );
}
}
A) 0
B) 1
C) 2
D) 3
class Train{
int speed=10;
public void getSpeed(){
System.out.println(speed);
}
public void setSpeed(int speed ){
this.speed=40;
speed=this.speed;
}
}
class BulletTrain extends Train {
int speed =20;
public void getSpeed(){
System.out.println(super.speed);
}
}
public class Program
{
public static void main(String[] args) {
Train train=new BulletTrain();
train.setSpeed(50);
train.getSpeed();
}
}
int speed=10;
public void getSpeed(){
System.out.println(speed);
}
public void setSpeed(int speed ){
this.speed=40;
speed=this.speed;
}
}
class BulletTrain extends Train {
int speed =20;
public void getSpeed(){
System.out.println(super.speed);
}
}
public class Program
{
public static void main(String[] args) {
Train train=new BulletTrain();
train.setSpeed(50);
train.getSpeed();
}
}
import java.util.*;
public class Program
{
public static void main(String[] args) {
HashSet<Integer> h=new HashSet<>();
h.add(null);
h.add(null);
h.add(100);
h.add(300);
h.add(400);
h.add(null);
h.add(100);
h.add(300);
Object[] o=h.toArray();
System.out.println(Arrays.toString(o));
}
}
public class Program
{
public static void main(String[] args) {
HashSet<Integer> h=new HashSet<>();
h.add(null);
h.add(null);
h.add(100);
h.add(300);
h.add(400);
h.add(null);
h.add(100);
h.add(300);
Object[] o=h.toArray();
System.out.println(Arrays.toString(o));
}
}
Options for above program
Anonymous Quiz
25%
[null,400,100,300]
25%
[null,null,100,300,400,null,100,300]
40%
Compilation Problem
10%
None of these
public class Program
{
public static void main(String[] args) {
try{
int sum=5;
for(int i=-1;i<5;++i){
sum=sum/i;
}
}catch(ArithmeticException e){
System.out.println("0");
}
System.out.println(sum);
}
}
{
public static void main(String[] args) {
try{
int sum=5;
for(int i=-1;i<5;++i){
sum=sum/i;
}
}catch(ArithmeticException e){
System.out.println("0");
}
System.out.println(sum);
}
}