Java Programming Interview Questions

FOR Loop

1. What is the output of the following code snippet?

for(int i=1;i<=3;i++){

System.out.print(i++);

}

A. 1

B. 1 2 3

C. 2 3

D. 1 3

E. 2 3 4 

2. What is the output of the following code snippet?

int i;

for(i=1;i<=3;i++);

System.out.print(i+" ");

A. 1 2 3 

B. 1 2 

C. 2 

D. 3 

E. 4

3. What is the output of the following code snippet?

int i;

for(i=1;i<=3;i++);

System.out.print(i+" ");

A. 1 2 3 

B. 1 2 

C. 2 

D. 3 

E. 4

4. What is the output of the following code snippet?

for(int i=1,j=2;i<=2;i++,j--){

System.out.println(i+" "+j--);

}

A. 1 2 

2 1  

B. 1 2

2 -1 

C. 1 1 

2 0

D. 1 2

2 0

E. 1 0

2 -1

5. What is the output of the following code snippet?

int n=10,i,j;

for(i=1;i<=n;i++){

  int count=0;

for( j=1;j<=i;j++){

if(i%j==0)

count++;

}

       if(count==2)

   if(i%2!=0)

System.out.print(i+" ");

}

A. 2 3 5 7 9 

B. 3 5 7 9 

C. 3 5 7

D. 1 3 5 7 9

E. 1 2 3 5 7 9

6. What is the output of the following code snippet?

int i=0,j=1;

System.out.print(i+" "+j);

for(int k=1;k<=3;k++){

int sum=i+j;

        System.out.print(" "+sum);

i=j;

j=sum;

}

A. 0 1 1 

B. 0 1 1 2

C. 0 1 1 2 5

D. 0 1 1 2 3

E. 0 1 1 1 3 

7. What is the output of the following code snippet?

int k=1;

for(int i=1;i<3;i++){

for(int j=1;j<=3;j++){

System.out.print(k+++" ");

}

System.out.println();

}

A. 1 2 3

1 2 3

B. 1 2 3 

3 2 1

C. 1 2 3

4 5 6

D. 1 2 3

2 3 4 

E. None of the above

8. What is the output of the following code snippet?

for(int i=1;i<=2;i++){

for(int j=1;j<=5;j++){

        if(i%2==0 && j%2==0)

System.out.println(i+" "+j);

}

}

A. 2 2

4 4

B. 1 2

2 2 

C. 2 2 

4 4 

D. 2 2

2 4 

E. 1 2 

3 4  

9. What is the output of the following code snippet?

int i, j, k, l;

for (i = 1; i <= 3; i++) {

for (j = 1; j <= 3 - i; j++)

System.out.print(" ");

for (k = 1; k <= i; k++)

System.out.print(k);

for (l = k - 2; l >= 1; l--)

System.out.print(l);

System.out.println();

}

A. 1 

123

1232

B. 1 

123

12345

C. 1

121

12321

D. 1

121

123321

E. None of the above

10. What is the output of the following code snippet?

int i, j, k, l, count = 0;

for (i = 1; i <= 3; i++) {

count++;

for (j = 1; j <= 3 - i; j++)

count++;

for (k = 1; k <= i; k++) {

count++;

break;

}

for (l = k - 2; l >= 1; l--)

count++;

}

System.out.println(count);

A. 8

B. 7

C. 9

D. 10

E. 11

11. What is the output of the following code snippet?

int i,j,count=0;

for(i=1;i<=3;i++){

  for(j=1;j<=3;j++,count++);

}

System.out.println(count);

A. 8

B. 7

C. 9

D. 10

E. 11