Java multiple choice objective type questions for written test and answers
(1)
(1)
public class ArrayDemo {
public static void main(String[] args) {
long [][]arr=new long [2][];
arr[0]=new int[2];
arr[1]=new int[3];
arr[0][1]=015L;
System.out.println(arr[0][1]);
}
}
What will be output of above program?
(a)13
(b)15
(c)0
(d) Compiler error
Answer:(d)
(2)
public class BreakDemo {
public static void main(String[] args){
Boolean b=21>=21;
block1:{
block2:{
block3:{
if(b)
break block2;
System.out.println("BLOCK3");
}
System.out.println("BLOCK2");
}
System.out.println("BLOCK1");
}
}
}
What will be output of above program?
(a)Infinite loop
(b)BLOCK2
BLOCK1
(c)BLOCK1
(d)Compiler error
Answer:(C)
(3)What will be output of following program?
public class Float {
public static void main(String[] args) {
float f=5.3f;
if(f==5.3)
System.out.println("equal");
else
System.out.println("not equal");
}
}
(a)equal
(b)not equal
(c)Run time error
(d)Compiler error
Answer: (b)
Explanation:
(4)
public class EnumTest {
public static void main(String[] args) {
byte a=-0x15;
byte c=a>>2;
System.out.print(c);
}
}
What will output when you compile and run the above code?
(a) 84
(b) -84
(c) -5
(d)Compiler error
Answer: (d)
(5)
public class Overloading {
public static void main(String[] args) {
int a=25;
System.out.println((Long)a);
}
}
What will be output of above program?
(a)25
(b)25l
(c)25L
(d)Compiler error
Answer: (d)
india
(6)
public class ArrayDemo {
public static void main(String[] args) {
long [][]arr=new long [2][];
arr[0]=new long[2];
arr[1]=new long[3];
arr[0][1]=5L;
System.out.println(arr[0][1]);
}
}
What will be output of above program?
(a)5
(b)5l
(c)5L
(d) Compiler error
Answer: (a)
(7)
public class BreakDemo {
public static void main(String[] args){
int a=2;
++a;
if(a==3)
break india
}
System.out.print(a);
}
}
What will be output of above program?
(a)3
(b)4
(c)2
(d)Compiler error
Answer: (a)
(8)Which of the following java doesn’t support?
(a)Signed number
(b)Unsigned number
(c)Signed right shift
(d)Unsigned right shift
Answer: (b)
Explanation:
Java language doesn’t support unsigned number because for programming purpose there is not use of concept of unsigned number .Unsigned number is used to check the singe higher order bit of numeric data . java fulfill this requirement by using concept of unsigned right shift (>>>).
(9)
public class EnumTest {
public static void main(String[] args) {
byte a=-15;
int c=a>>2;
System.out.print(c);
}
}
What will output when you compile and run the above code?
(a)-60
(b)-3
(c)Compiler error
(d)None of these
Answer: ()
(10)
class Operator
{
public static void main(String arg[])
{
int i=2;
int j=++i + ++i + ++i;
System.out.println(j);
}
}
What will output when you compile and run the above code?
(a)250
(b)-123
(c)-6
(d) Compiler error
Answer: (c)
(11)
public class ArrayDemo {
public static void main(String[] args) {
if((int)Math.sqrt(2)==1)
System.out.println("equal(+)");
if((int)Math.sqrt(2)==-1)
System.out.println("equal(-)");
}
}
What will be output of above program?
(a) equal(+)
(b) equal(-)
(c) equal(+)
equal(-)
(d)Compiler error
Answer: (a)
(12)What is not true about new operator?
(a) new is reserved word of java programming.
(b) It dynamically allocates memory.
(c) If new operator is not able to allocate memory for object then run
time exception will occur.
(d)With the help delete keyword we can release the memory spaces which
has been allocated by new operator.
Answer: (d)
(13)What will be output of following program?
public class Float {
public static void main(String[] args) {
float f=5.5f;
if(f==5.5)
System.out.println("equal");
else
System.out.println("not equal");
}
}
(a) equal
(b) not equal
(c) Run time error
(d)Compiler error
Answer: (a)
Explanation:
(14)
public class BitwiseOpe {
public static void main(String[] args) {
int a=-0x20;
int b=a<<3;
System.out.println(b);
}
}
What will output when you compile and run the above code?
(a)1
(b)-256
(c)-1
(d)Compiler error
Answer: (b)
(15)
public class Overloading {
short s=(2);
Overloading(){
++s;
++this.s;
}
Overloading(Overloading t){
++t.s;
++this.s;
}
public static void main(String[] args) {
Overloading t1=new Overloading();
Overloading t2=new Overloading(t1);
System.out.print(t2.s-t1.s);
}
}
What will be output of above program?
(a)0
(b)-1
(c)-2
(d)Compiler error
Answer: (c)
1. Java questions and answers
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1. Java questions and answers
2. Java questions for freshers
3. Java question bank
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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
6 comments:
consider 12.a new can also be used in C++
and what is the difference in answer in 5.3f equal and 5.5f not equal..kindly explain
Good questions!!!
I have added few C/C++ questions in
C/C++ Interview Questions
Have a look at them and reply.
how did in 13th question program prints equal for 5.5 while not question for 5.3 in 3rd question
how did in 13th question program prints equal for 5.5 while it prints not equal for 5.3 in 3rd question
Answer for Question No-10 is 12 which is not present in the options.
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