Java Quiz 8 : Operators III & Control Statements

Welcome to your Java Quiz 8 : Operators III & Control Statements

1. Which of these have highest precedence?

a) ()

b) ++

c) *

d) >>

2. What should be expression1 evaluate to in using ternary operator as in this line?

 expression1 ? expression2 : expression3

a) Integer

b) Floating – point numbers

c) Boolean

d) None of the mentioned

3. What is the value stored in x in the following lines of Java code?

 int x, y, z; x = 0; y = 1; x = y = z = 8;

a) 0

b) 1

c) 9

d) 8

4. What is the order of precedence (highest to lowest) of following operators?

 1. & 2. ^ 3. ?:

a) 1 -> 2 -> 3

b) 2 -> 1 -> 3

c) 3 -> 2 -> 1

d) 2 -> 3 -> 1

5. Which of these statements are incorrect?

a) Equal to operator has least precedence

b) Brackets () have highest precedence

c) Division operator, /, has higher precedence than multiplication operator

d) Addition operator, +, and subtraction operator have equal precedence

6. What will be the output of the following Java code?

```
 class operators 
```
```
 {
```
```
 public static void main(String args[])
```
```
 {
```
```
 int var1 = 5; 
```
```
 int var2 = 6;
```
```
 int var3;
```
```
 var3 = ++ var2 * var1 / var2 + var2;
```
```
 System.out.print(var3);
```
```
 } 
```
```
 }
```

a) 10

b) 11

c) 12

d) 56

7. What will be the output of the following Java code?

```
 class operators 
```
```
 {
```

 public static void main(String args[])

```
 { 
```
```
 int x = 8;
```
```
 System.out.println(++x * 3 + " " + x);
```
```
 } 
```
```
 }
```

a) 24 8

b) 24 9

c) 27 8

d) 27 9

8. What will be the output of the following Java code?

```
class Output 
```
```
{
```

 public static void main(String args[])

```
 { 
```
```
 int x=y=z=20;
```
```
 
```
```
 } 
```
```
}
```

a) compile and runs fine

b) 20

c) run time error

d) compile time error

9. Which of these lines of Java code will give better performance?

 1. a | 4 + c >> b & 7; 2. (a | ((( 4 * c ) >> b ) & 7 ))

a) 1 will give better performance as it has no parentheses

b) 2 will give better performance as it has parentheses

c) Both 1 & 2 will give equal performance

d) Dependent on the computer system

10. What will be the output of the following Java program?

```
class Output 
```
```
{
```

 public static void main(String args[])

```
 { 
```
```
 int a,b,c,d;
```
```
 a=b=c=d=20
```
```
 a+=b-=c*=d/=20
```

 System.out.println(a+" "+b+" "+c+" "+d);

```
 
```
```
 } 
```
```
}
```

a) compile time error

b) runtime error

c) a=20 b=0 c=20 d=1

d) none of the mentioned

11. Which of these selection statements test only for equality?

a) if

b) switch

c) if & switch

d) none of the mentioned

12. Which of these are selection statements in Java?

a) if()

b) for()

c) continue

d) break

13. Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?

a) do-while

b) while

c) for

d) none of the mentioned

14. Which of these jump statements can skip processing the remainder of the code in its body for a particular iteration?

a) break

b) return

c) exit

d) continue

15. Which of this statement is incorrect?

a) switch statement is more efficient than a set of nested ifs

b) two case constants in the same switch can have identical values

c) switch statement can only test for equality, whereas if statement can evaluate any type of boolean expression

d) it is possible to create a nested switch statements

Time is Up!