Kapitel 3

Question 1

1

Answer 1

if (y == 20)

x = 0;

Question 2

2

Answer 2

if (hours > 40)

payRate *= 1.5;

Question 3

3

Answer 3

if (sales >= 10000)

commission = 0.2;

Question 4

4

Answer 4

if (max)

fees = 50;

Question 5

5

Answer 5

if (x > 100)
{
y = 20;
z = 40;
}

Question 6

6

Answer 6

if (a < 10)
{
b = 0;
c = 1;
}

Question 7

7

Answer 7

if (myCharacter == ‘D’)

System.out.println(“Goodbye”);

Question 8

8

Answer 8

if (x > 100)
y = 20;
else
y = 0;

Question 9

9

Answer 9

if (y == 100)
x = 1;
else
x = 0;

Question 10

10

Answer 10

if (sales >= 50000.0)
commission = 0.2;
else
commission = 0.1;

Question 11

11

Answer 11

if (a < 10)
{
b = 0;
c = 1;
}
else
{
b = -99;
c = 0;
}

Question 12

12

Answer 12

1 1

Question 13

13

Answer 13

If the customer purchases this many coupons are
this many books . . . given.
1 1
2 1
3 2
4 2
5 3
10 3

Question 14

14

Answer 14

if (amount1 > 10)
{
if (amount2 < 100)
{
if (amount1 > amount2)
System.out.println(amount1);
else
System.out.println(amount2);
}
}

Question 15

15

Answer 15

if (x > 0)
{
if (y < 20)
{
z = 1;
}
else
{
z = 0;
}
}

Question 16

16

Answer 16

Logical Expression Result (true or false)
true && false false
true && true true
false && true false
false && false false
true || false true
true || true true
false || true true
false || false false
!true false
!false true

Question 17

17

Answer 17

T, F, T, T, T

Question 18

18

Answer 18

if (speed >= 0 && speed );

Question 19

19

Answer 19

if (speed < 0 || speed > 200)

System.out.println(“The number is not valid”);

Question 20

20

Answer 20

if (name.equals(“Timothy”))

System.out.println(“Do I know you?”);

Question 21

21

Answer 21

if (name1.compareTo(name2) < 0)
System.out.println(name1 + “ “ + name2);
else
System.out.println(name2 + “ “ + name1);

Question 22

22

Answer 22

if (name.equalsIgnoreCase(“Timothy”))

System.out.println(“Do I know you?”);

Question 23

23

Answer 23

a) z = x > y ? 1 : 20;
b) population = temp > 45 ? base * 10 : base * 2;
c) wages = hours > 40 ? wages * 1.5 : wages * 1;
d) System.out.println(result >=0 ? “The result is positive” :
“The result is negative”);

Question 24

24

Answer 24

// Here is the switch statement.
switch(userNum)
{
case 1 : System.out.println("One");
break;
case 2 : System.out.println("Two");
break;
case 3 : System.out.println("Three");
break;
default: System.out.println("Error: invalid number.");
}

Question 25

25

Answer 25

switch(selection)
{
case ‘A’ : System.out.println(“You selected A.”);
break;
case ‘B’ : System.out.println(“You selected B.”);
break;
case ‘C’ : System.out.println(“You selected C.”);
break;
case ‘D’ : System.out.println(“You selected D.”);
break;
default : System.out.println(“Not good with letters, eh?”);
}

Question 26

26

Answer 26

Because it uses greater-than and less-than operators in the comparisons.

Question 27

27

Answer 27

The case expressions must be a literal or a final variable, which must be of the
char , byte , short , or int types. In this code, relational expressions are used.

Question 28

28

Answer 28

That is serious.

Question 29

29

Answer 29

System.out.printf(“%,.2f”, number);

Question 30

30

Answer 30

System.out.printf(“%10.1f”, number);

Question 31

31

Answer 31

System.out.printf(“%08.1f”, number);

Question 32

32

Answer 32

System.out.printf(“%,10d”, number);

Question 33

33

Answer 33

System.out.printf(“%-,20.2f”, number);

Question 34

34

Answer 34

System.out.printf(“%20s”, name);

Question 35

35

Answer 35

“00000.000”

Question 36

36

Answer 36

”#.00”

Question 37

37

Answer 37

”#,###,##0.00” or “0,000,000.00”