Deck 3: Decision Structures

Question 1

What will be printed when the following code is executed? double x = 45678.259;
DecimalFormat formatter =
New DecimalFormat("#,###,##0.00");
System.out.println(formatter.format(x));

A) 45678.259
B) 0,045,678.26
C) 45,678.26
D) 45,678.3

Answer 1

C

Question 2

What would be the value of x after the following statements were executed? int x = 10;
Switch (x)
{
Case 10:
X += 15;
Case 12:
X -= 5;
Break;
Default:
X *= 3;
}

A) 5
B) 20
C) 25
D) 30

Answer 2

B

Question 3

What would be the value of bonus after the following statements are executed? int bonus,sales = 1250;
If (sales > 1000)
Bonus = 100;
If (sales > 750)
Bonus = 50;
If (sales > 500)
Bonus = 25;
Else
Bonus = 0;

A) 100
B) 500
C) 25
D) 0

Answer 3

C

Question 4

What will be the value of bonus after the following code is executed? int bonus,sales = 10000;
If (sales < 5000)
Bonus = 200;
Else if (sales < 7500)
Bonus = 500;
Else if (sales < 10000)
Bonus = 750;
Else if (sales < 20000)
Bonus = 1000;
Else
Bonus = 1250;

A) 200
B) 500
C) 750
D) 1000
E) 1250

Question 5

In Java,when a character is stored in memory,it is actually stored as a(n)_____.

A) Unicode number
B) ASCII character code
C) EBCDIC character code
D) Morse code

Question 6

What will be the value of ans after the following code has been executed? int ans = 10;
Int x = 65;
Int y = 55;
If (x >= y)
Ans = x + y;

A) 10
B) 120
C) 100
D) No value,there is a syntax error

Question 7

What will be the value of x after the following code is executed? int x = 75;
Int y = 60;
If (x > y)
X = x - y;

A) 75
B) 15
C) 60
D) 135

Question 8

What would be the value of bonus after the following statements are executed? int bonus,sales = 85000;
Char dept = 'S';
If (sales > 100000)
If (dept == 'R')
Bonus = 2000;
Else
Bonus = 1500;
Else if (sales > 75000)
If (dept == 'R')
Bonus = 1250;
Else
Bonus = 1000;
Else
Bonus = 0;

A) 2000
B) 1500
C) 1250
D) 1000

Question 9

Which of the following will format .1278 to display as 12.8%?

A) 000.0%
B) #0.00%
C) ###.##%
D) ##0.0%

Question 10

A flag may have the values

A) 0 or 1
B) +1 or -1
C) true or false
D) of any character

Question 11

If chr is a character variable,which of the following if statements is written correctly?

A) if (chr = "a")
B) if (chr == "a")
C) if (chr = 'a')
D) if (chr == 'a')

Question 12

What will be the value of ans after the following code has been executed? int x = 90,y = 55,ans = 10;
If ( x == y);
Ans *= 2;

A) 10
B) 145
C) 20
D) No value,there is a syntax error

Question 13

If str1 and str2 are both Strings,which of the following will correctly test to determine whether str1 is less than str2? (1)(str1 < str2)
(2)(str1.equals(str2)< 0)
(3)(str1.compareTo(str2)< 0)

A) 1,2,and 3 will all work
B) 2
C) 3
D) 2 and 3

Question 14

What will be the values of ans,x,and y after the following statements are executed? int ans = 35,x = 50,y =50;
If ( x >= y)
{
Ans = x + 10;
X -=y;
}
Else
{
Ans = y + 10;
Y += x;
}

A) ans = 60,x = 50,y =100
B) ans = 60,x =0,y =50
C) ans = 45,x = 50,y = 0
D) ans = 45,x = 50,y = 50

Question 15

To do a case insensitive compare which of the following could be used to test the equality of two strings,str1 and str2?

A) (str1.equalsIgnoreCase(str2))
B) (str1.compareToIgnoreCase(str2)== 0)
C) Only a
D) a and b

Question 16

Which of the following expressions will determine whether x is less than or equal to y?

A) x > y
B) x =< y
C) x < = y
D) x >= y

Question 17

What will be the value of pay after the following statements are executed? int hours = 45;
Double pay,payRate = 10.00;
Pay = hours < = 40 ? hours * payRate :
40 * payRate + (hours - 40)* payRate * 1.5;

A) 400.00
B) 450.00
C) 465.00
D) 475.00

Question 18

The _________ statement is used to make simple decisions in Java.

A) do/while
B) for
C) branch
D) if

Question 19

Which of the following is the correct boolean expression to test for: int x being a value between,but not including,500 and 650,or int y not equal to 1000?

A) ((x >= 500 && x < = 650)&& (y != 1000))
B) ((x > 500 AND x < 650)OR !))
C) ((x > 500 && x < 650)|| (y != 1000))
D) ((x < 500 && x > 650)|| !(y == 1000))

Question 20

A block of code is enclosed in a set of

A) braces { }
B) parentheses ( )
C) double quotes " "
D) brackets [ ]

Question 21

Enclosing a group of statements inside a set of braces creates a

A) block of statements
B) boolean expression
C) loop
D) Nothing,it is just for readability

Question 22

The expression tested by an if statement must evaluate to

A) 0 or 1
B) +1 or -1
C) true or false
D) t or f

Question 23

If str1 and str2 are both Strings,which of the following expressions will correctly determine whether they are equal? (1)(str1 == str2)
(2)str1.equals(str2)
(3)(str1.compareTo(str2)== 0)

A) 1,2,and 3 will all work
B) 1 and 2
C) 1 and 3
D) 2 and 3

Question 24

What would be the value of discountRate after the following statements are executed? double discountRate = 0.0;
Int purchase = 100;
If (purchase > 1000)
DiscountRate = .05;
Else if (purchase > 750)
DiscountRate = .03;
Else if (purchase > 500)
DiscountRate = .01;

A) .05
B) .03
C) .01
D) 0.0

Question 25

What will be printed when the following code is executed? int y = 10;
If ( y == 10)
{
Int x = 30;
X += y;
}
System.out.print("x = ");
System.out.print(x);

A) x = 30
B) x = 40
C) x = 20
D) x is unknown when the last statement is executed

Question 26

What will be the value of charges after the following code is executed? double charges,rate = 7.00;
Int time = 180;
Charges = time < = 119 ? rate * 2 :
Time / 60.0 * rate;

A) 7.00
B) 14.00
C) 21.00
D) 28.00

Question 27

What would be the value of discountRate after the following statements are executed? double discountRate = 0.0;
Int purchase = 1250;
If (purchase > 1000)
DiscountRate = .05;
If (purchase > 750)
DiscountRate = .03;
If (purchase > 500)
DiscountRate = .01;
Else
DiscountRate = 0;

A) .05
B) .03
C) .01
D) 0

Question 28

What would be the value of discountRate after the following statements are executed? double discountRate = 0.0;
Int purchase = 1250;
Char cust = 'N';
If (purchase > 1000)
If (cust == 'Y')
DiscountRate = .05;
Else
DiscountRate = .04;
Else if (purchase > 750)
If (cust == 'Y')
DiscountRate = .04;
Else
DiscountRate = .03;
Else
DiscountRate = 0;

A) .05
B) .04
C) .03
D) 0

Question 29

Which of the following is the correct boolean expression to test for: int x being a value less than or equal to 500 or greater than 650,and int y not equal to 1000?

A) ((x >= 500 && x < 650)&& (y != 1000))
B) ((x < = 500 OR x > 650)AND !))
C) ((x >= 500 || x < 650)|| (y != 1000))
D) ((x < = 500 || x > 650)&& !(y == 1000))

Question 30

What is the value of ans after the following code has been executed? int x = 40;
Int y = 40;
Int ans = 0;
If (x = y)
Ans = x + 10;

A) 50
B) 80
C) 30
D) No value,this is a syntax error.

Question 31

What will be printed when the following code is executed? double x = 45678.259;
DecimalFormat formatter =
New DecimalFormat("#,##0.0");
System.out.println(formatter.format(x));

A) 45678.259
B) 45,678.259
C) 45,678.26
D) 45,678.3

Question 32

Which of the following will format 12.78 to display as 012.8?

A) 000.0
B) #0.00
C) ###.#
D) ##0.0%

Question 33

What is the value of x after the following code has been executed? int x = 75;
Int y = 90;
If ( x != y)
X += y;

A) 75
B) 90
C) 15
D) 165

Question 34

What will be the values of ans,x,and y after the following statements are executed? int ans = 0,x = 15,y =25;
If ( x >= y)
{
Ans = x + 10;
X -=y;
}
Else
{
Ans = y + 10;
Y += x;
}

A) ans = 0,x = 15,y = 25
B) ans = 25,x = -10,y = 25
C) ans = 35,x = 15,y = 40
D) ans = 25,x = 15,y = 40

Question 35

What would be the value of discountRate after the following statements are executed? double discountRate;
Char custType = 'B';
Switch (custType)
{
Case 'A':
DiscountRate = .08;
Break;
Case 'B':
DiscountRate = .06;
Case 'C':
DiscountRate = .04;
Default:
DiscountRate = 0.0;
}

A) .08
B) .06
C) .04
D) 0.0

Question 36

In an if/else statement,if the boolean expression is false,

A) the first statement or block is executed
B) the statement or block following the else is executed
C) all statements or blocks are executed
D) no statements or blocks are executed

Question 37

Which of the following correctly tests the char variable chr to determine whether it is not equal to the character B?

A) if (chr > 'B')
B) if (chr < 'B')
C) if (chr != 'B')
D) if (chr != "B")

Question 38

This is a boolean variable that signals when some condition exists in the program

A) Sentinel
B) Block
C) Flag
D) Case

Question 39

These operators are used to determine whether a specific relationship exists between two values.

A) Arithmetic
B) Relational
C) Syntactical
D) Assignment

Question 40

What is the value of ans after the following code has been executed? int x = 35;
Int y = 20,ans = 80;
If (x < y);
Ans += y;

A) 80
B) 100
C) 35
D) 55

Question 41

When testing for character values,the switch statement does not test for the case of the character.

Question 42

What does the following code display? int d = 9,e = 12;
System.out.printf("%d %d \ n",d,e);

A) %d %d
B) 9 12
C) %d 9
D) %9 %12

Question 43

Because the && operator performs short-circuit evaluation,your boolean expression will usually execute faster if the subexpression that is most likely false is on the left of the && operator.

Question 44

Unicode is an international encoding system that is extensive enough to represent ALL the characters of ALL the world's alphabets.

Question 45

When two Strings are compared using the compareTo method,the cases of the two strings are not considered.

Question 46

Because the || operator performs short-circuit evaluation,your boolean expression will generally be evaluated faster if the subexpression that is most likely to be true is on the left.

Question 47

The if/else statement will execute one group of statements if its boolean expression is true or another group if its boolean expression is false.

Question 48

An important style rule you should adopt for writing if statements is to write the conditionally executed statement on the line after the if statement.

Question 49

An important style rule you should follow when writing if statements is to line up the conditionally executed statement with the if statement.

Question 50

In a switch statement,if two different values for the CaseExpression would result in the same code being executed,you must have two copies of the code,one after each CaseExpression.

Question 51

A local variable's scope always ends at the closing brace of the block of code in which it is declared.

Question 52

What does the following code display? double x = 12.3798146;
System.out.printf("%.2f \ n",x);

A) 123798146
B) 1238
C) %12.38
D) 12.38