Java Test 3 Part A

1. Int x = -7;
int y = 3;
!(3*x < 4*y) && (5*x >=y)

The result of this expression will be

True

False

2. An expression containing the || operator is true if either or both of its operands are true.

True

False

3. An else must always have a corresponding if.

True

False

4. 0.025 >= 0.333

The result of relational operations will be

True

False

5. The loop counter in a for loop is altered after the loop body is executed in a given iteration.

True

False

6. The expression ((x > y) && (a < b)) is true if either x > y is true or a < b is true.

True

False

7. Consider the following switch statement:

int x = 3;
switch (power)
{
   case 0 : io.writeInfo("1");
                break;
   case 1 : io.writeInfo(x);
                break;
   case 2 : io.writeInfo(x * x);
                break;
   case 3 : io.writeInfo(x * x * x);
                break;
   case 4 : io.writeInfo(x * x * x * x);
                break;
   default : io.writeInfo("No match exists for this power");
}//END switch

What will be displayed by the code if power = 1?

1

3

9

27

81

8. The loop body of the do/while loop will be executed at least ___ time(s).

0

1

2

None of above

9. The continue statement is used to immediately terminate a loop.

True

False

10. Consider the following switch statement:

int x = 3;
switch (power)
{
   case 0 : io.writeInfo("1");
                break;
   case 1 : io.writeInfo(x);
                break;
   case 2 : io.writeInfo(x * x);
                break;
   case 3 : io.writeInfo(x * x * x);
                break;
   case 4 : io.writeInfo(x * x * x * x);
                break;
   default : io.writeInfo("No match exists for this power");
}//END switch

What will be displayed by the code if power = 2?

1

3

9

27

81

11. The continue statement is used to skip over a single loop iteration.

True

False

12. (-6<0) && (12 >= 10)

The result of this operation will be

True

False

13. A do/while loop is a post-test loop.

True

False

14. Consider the following segment of code:

if (x>=0)
   if (x<10)
   {
       y = x * x;
       if (x<=5)
           x = x - 2;
    } //END if x < 10
    else
       y = 10 + x;
else
   y = x * x * x;
io.writeInfo("x = " + x + "\ny = " +y);

What will be displayed by the program if x = 4?

X = 4y = 64

X = 2y = 16

X = 4y = 16

X = 4 y = 14

15. When using a switch statement in Java, a no-match condition results in an error.

True

False

16. (5!=5)&&(3<6)

The result of this operation will be

True

False

17. Consider following program segment.

int a = 1;
while (17 % a != 5)
{
System.out.println(a + " " + 17 % a);
++a;
}// END while

How many times will the loop be executed?

0 time

1 time

3 times

5 times

18. Consider the following switch statement:

int x = 3;
switch (power)
{
   case 0 : io.writeInfo("1");
                break;
   case 1 : io.writeInfo(x);
                break;
   case 2 : io.writeInfo(x * x);
                break;
   case 3 : io.writeInfo(x * x * x);
                break;
   case 4 : io.writeInfo(x * x * x * x);
                break;
   default : io.writeInfo("No match exists for this power");
}//END switch

What will be displayed by the code if power = 0?

1

3

9

27

81

19. How many times is the following loop executed?

for (int x=0; x <= 10; ++x)
System.out.println("This is a for loop.");

0

1

11

Infinite

20. Consider the following segment of code:

if (x>=0)
   if (x<10)
   {
       y = x * x;
       if (x<=5)
           x = x - 2;
    } //END if x < 10
    else
       y = 10 + x;
else
   y = x * x * x;
io.writeInfo("x = " + x + "\ny = " +y);

What will be displayed by the program if x = -5?

X = -5y = 25

X = -7y = 25

X = -5y = 5

X = -5y = -125

21. The default case is required in the switch selection statement.

True

False

22. Which of the following is NOT an iteration control structure in Java?

For

Switch

While

Do/while

23. How many times will the following loop execute?

int x = 1;
do
{
System.out.println("This is a do/while loop");
++x;
}while(x >= 0);

0

1

2

Infinite

24. Consider the following segment of code:

if (x>=0)
   if (x<10)
   {
       y = x * x;
       if (x<=5)
           x = x - 2;
    } //END if x < 10
    else
       y = 10 + x;
else
   y = x * x * x;
io.writeInfo("x = " + x + "\ny = " +y);

What will be displayed by the program if x = 6?

X = 6 y =36

X = 4y = 36

X = 6y = 16

X =4y = 64

25. Consider the following program segment

int b = 2;
do {
System.out.println(b + " " + b/5);
b = b + 2;
}while ( b != 20);

How many times will the loop be executed?

1

5

9

10

26. A statement that can be inserted at the end of a switch statement to protect against invalid entries is the ___________ statement

Break

Default

Case

Initial

27. The loop body of the while loop will be executed at least ____ time(s)

0

1

2

None of above

28. Suppose that you have two nested loops. The inner loop executes five times and the outer loop executes ten times. How many total iterations are there within the nested loop structure?

15 total iterations

20 total iterations

50 total iterations

100 total iterations

29. Consider the following segment of code:

if (x>=0)
   if (x<10)
   {
       y = x * x;
       if (x<=5)
           x = x - 2;
    } //END if x < 10
    else
       y = 10 + x;
else
   y = x * x * x;
io.writeInfo("x = " + x + "\ny = " +y);

What will be displayed by the program if x = 0?

X = 0y = 0

X = 0 y = 10

X = -2y = 0

X = -2y = 10

30. How many times is the following loop executed?

for ( int x = 0; x > 0; ++x)
System.out.println("This is a for loop.");

0

1

2

Infinite

31. Determine the output generated by the following program segment.

int number = 1;
int product = 1;
do {
++ number;
product = product * number;
} while ( number < 5);
io.writeInfo("The product is: " + product);

The product is 1

The product is 24

The product is 120

The product is 2

32. Consider the following segment of code:

if (x>=0)
   if (x<10)
   {
       y = x * x;
       if (x<=5)
           x = x - 2;
    } //END if x < 10
    else
       y = 10 + x;
else
   y = x * x * x;
io.writeInfo("x = " + x + "\ny = " +y);

What will be displayed by the program if x = 10?

X = 10y = 100

X = 8y = 100

X = 10 y = 20

X = 10y = 1000