java question papers answers for mca ,bca and diploma
(1)
(1)
public class Loop {
public static void main(String[] args){
int i=0;
boolean b=true;
for(i++;b;i++)
{
System.out.println(~i);
b^=true;
}
}
}
What will be output of above program?
(a)-2
(b)-3
(c)Infinite loop
(d)Compiler error
Answer: (a)
(2)
public class ClassDemo {
public static void main(String[] args){
ClassDemo o=new ClassDemo();
o.cal(5,10,15);
}
void cal(byte p,byte q,byte r)
{
System.out.print(p+q+r);
}
}
What will be output of above program?
(a)30
(b)30b
(c)30B
(d)Compiler error
Answer: (d)
(3)
public class Literal {
public static void main(String[] args) {
int a ='\u0041';
int b='\15';
int c=a+b;
System.out.println(c);
}
}
What will output when you compile and run the above code?
(a)56
(b)4115
(c)78
(d) Compiler error
Explanation: (c)
(4)
class BitwiseOperator
{
public static void main(String[] args)
{
byte a=-10,b=0;
b=a>>2;
System.out.println(b);
}
}
What will output when you compile and run the above code?
(a)-40
(b)-2
(c)2
(d)Compiler error
Answer: (d)
(5)
package raja;
public class World {
boolean b=false^false;
Boolean c=!true;
}
package manish;
import raja.World;
class AccessControl {
public static void main(String[] args){
World w=new World();
System.out.print(w.b+","+w.c);
}
}
What will be output of above program?
(a)false,false
(b)true,false
(c)true,true
(d)Compiler error
Answer: (d)
(6)
public class Loop {
public static void main(String[] args){
int i=0;
int j=5;
boolean b=true;
for(i++,--j;b;)
{
System.out.println(~i-~j);
b^=true;
}
}
}
What will be output of above program?
(a)3
(b)4
(c)Infinite loop
(d)Compiler error
Answer: (a)
(7)
public class ClassDemo {
public static void main(String[] args){
ClassDemo o=new ClassDemo();
o.cal(5,10,15);
}
void cal(short p,short q,short r)
{
System.out.print(~p+~q+~r);
}
}
What will be output of above program?
(a)-33
(b)-30
(c)-33h
(d)Compiler error
Answer: (d)
(8)
public class Literal {
public static void main(String[] args) {
int a=010+0x20+'\10'+'\u0020';
System.out.println(a);
}
}
(a)60
(b)2040
(c)80
(d) Compiler error
Answer: (c)
Explanation:
(9)
class BitwiseOperator
{
public static void main(String[] args)
{
byte a=-10;
int b=a>>2;
int c=a>>>2;
System.out.println("a= "+a+" b="+b+" c="+c);
}
}
What will output when you compile and run the above code?
(a) a=-10 b=-3 c=1073741821
(b) a=-3 b=-3 c=-3
(c) a=-10 b=-3 c=-3
(d)Compiler error
Answer: (a)
(10)
package raja;
public class World {
public boolean b=false^false;
public Boolean c=!true;
}
package manish;
import raja.World;
class AccessControl {
public static void main(String[] args) {
World w=new World();
System.out.print(w.b+","+w.c);
}
}
What will be output of above program?
(a)true,true
(b)false,false
(c)true,false
(d)Compiler error
Answer: (b)
(11)
public class Loop {
public static void main(String[] args){
int i=0;
int j=05;
for(i++,--j;j>0;)
{
System.out.println(j>>>i);
--j;
}
}
}
What will be output of above program?
(a)2
1
1
0
(b)2
0
(c)2
0
0
(d)Compiler error
Answer:(a)
(12)
public class ClassDemo {
public static void main(String[] args){
ClassDemo o=new ClassDemo();
o.cal(5,10,15);
}
void cal(short p,short q,short r)
{
System.out.print(~p+~q+~r);
}
}
What will be output of above program?
(a)-33
(b)-30
(c)-33h
(d)Compiler error
Answer: (d)
(13)What will be output of following program?
class StringLiteral
{
public static void main(String[] args)
{
String str="india\11usa";
System.out.println(str);
}
}
What will output when you compile and run the above code?
(a)India\11usa
(b)India usa
(c)india
(d)Compiler error
Answer: (b)
(14)
public class UnaryOperator {
public static void main(String[] args) {
int j=5;
j=++j + j++ + ++j;
System.out.print(j);
}
}
What will output when you compile and run the above code?
(a)18
(b)19
(c)20
(d)21
Answer: (c)
(15)
package raja;
class World {
public boolean b=false^false;
public Boolean c=!true;
}
Package manish;
import raja.World;
class AccessControl {
public static void main(String[] args) throws Exception {
World w=new World();
System.out.print(w.b+","+w.c);
}
}
What will be output of above program?
(a)false,false
(b)true,false
(c)true,true
(d)Compiler error
Answer: (d)
1. Java questions and answers
2. Java questions for freshers
3. Java question bank
4. Java question answer
5. Java interview questions
6. Java program examples
7. Java questions for viva
8. Java questions for SCJP exam and answers
9. Java questions for beginners
10. Basics objective types java questions and answers
1. Java questions and answers
2. Java questions for freshers
3. Java question bank
4. Java question answer
5. Java interview questions
6. Java program examples
7. Java questions for viva
8. Java questions for SCJP exam and answers
9. Java questions for beginners
10. Basics objective types java questions and answers
No comments:
Post a Comment