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java operators

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java operators
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

public class OperatorExample{  

public static void main(String args[]){  

int x=10;  

System.out.println(x++);

System.out.println(++x);

System.out.println(x--);

System.out.println(--x);

}}  

10 12 12 10

11 12 11 10

10 11 10 9

11 12 12 11

Answer explanation

//10 (11)  

//12  

//12 (11)  

//10  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

public class OperatorExample{  

public static void main(String args[]){  

int a=10;  

int b=10;  

System.out.println(a++ + ++a);  

System.out.println(b++ + b++);

  

}}  

20 20

20 22

22 21

21 22

Answer explanation

//10+12=22 

//10+11=21  

  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

public class OperatorExample{  

public static void main(String args[]){  

int a=10;  

int b=-10;  

boolean c=true;  

boolean d=false;  

System.out.println(-a);  

System.out.println(-b);

System.out.println(!c);

System.out.println(!d);

}}  

-10 -9 true false

-11 9 false true

-11 -9 true false

-10 9 false true

Answer explanation

//-11 (minus of total positive value which starts from 0)  

//9 (positive of total minus, positive starts from 0)  

//false (opposite of boolean value)  

//true  

}}  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

public class OperatorExample{  

public static void main(String args[]){  

System.out.println(10*10/5+3-1*4/2);  

}}  

11

3

10

21

Answer explanation

according to boadmas rule priority

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

public class OperatorExample{  

public static void main(String args[]){  

System.out.println(10<<2); 

System.out.println(10<<3);

System.out.println(20<<2);

System.out.println(15<<4);  

}}  

40 80 80 240

20 30 40 60

8 9 18 11

5 3.3 10 3.75

Answer explanation

//10*2^2=10*4=40  

//10*2^3=10*8=80  

//20*2^2=20*4=80  

//15*2^4=15*16=240  

}}  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

public OperatorExample{  

public static void main(String args[]){  

System.out.println(10>>2);

System.out.println(20>>2); 

System.out.println(20>>3);

}}  

20 40 60

40 80 160

2 5 2

10 20 23

Answer explanation

//10/2^2=10/4=2  

//20/2^2=20/4=5  

//20/2^3=20/8=2 

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

public class OperatorExample{  

public static void main(String args[]){  

int a=10;  

int b=5;  

int c=20;  

System.out.println(a<b&&a<c);

System.out.println(a<b&a<c); 

}}  

true true

false false

true false

false true

Answer explanation

//false && true = false  

//false & true = false 

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