Deck 3: More Flow of Control

Question 1

A switch statement variable must be ________

Answer 1

an integer, bool, char or enumerated type

Question 2

It is illegal to make function calls inside a switch statement.

Answer 2

False

Question 3

A function may return a boolean value.

Answer 3

True

Question 4

The code following the ________ case is executed if none of the other cases are matched in a switch statement.

Question 5

A ____________ expression is an expression that can be thought of as being true or false.

Question 6

The break statement causes all loops to exit.

Question 7

All switch statements can be converted into nested if-else statements

Question 8

A break statement in a switch stops your program.

Question 9

Which boolean operation is described by the following table?

A) or
B) and
C) not
D) none of the above

Question 10

A _________ loop always executes the loop body at least once, irregardless of the loop condition.

Question 11

A loop that iterates one too many or one too few times is said to be ________

Question 12

All nested if-else statements can be converted into switch statements.

Question 13

Variables defined inside a set of braces are said to be _______ to that block of code.

Question 14

A compound statement that contains variable declarations is called a __________.

Question 15

_________ is a type whose values are defined by a list of constants of type int.

Question 16

Each repetition of a loop body is called ____________.

Question 17

A semicolon by itself is a valid C++ statement.

Question 18

A boolean expression may evaluate to more than 2 values

Question 19

The compiler always pairs an else with _______________

Question 20

In an enumerated data type, different constants may not have the same value.

Question 21

If a programming language does not use short-circuit evaluation, what is the output of the following code fragment if the value of myInt is 0?
Int other=3, myInt;
IfmyInt !=0 && other % myInt !=0)
Cout << "other is odd\n";
Else
Cout << "other is even\n";

A) other is even
B) other is odd
C) 0
D) run-time error, no output

Question 22

What is the value of the following expression?
True && 4/3 || !6)))

A) true
B) false
C) 0
D) illegal syntax

Question 23

What is the output of the following code fragment?
Int x=0;
{
Int x=13;
Cout << x <<",";
}
Cout << x << endl;

A) 13,13
B) 0,13
C) 13,0
D) nothing, there is a syntax error.

Question 24

Given the following code, what is the final value of i?
Int i;
Fori=0; i<=4;i++)
{
Cout << i << endl;
}

A) 3
B) 4
C) 5
D) 0

Question 25

Which of the following symbols has the highest precedence?

A) ++
B) ||
C) &&
D) -

Question 26

Given the following enumerated data type definition, what is the value of SAT?
Enum myType{SUN=3,MON=1,TUE=3,WED,THUR,FRI,SAT,NumDays};

A) 7
B) 6
C) 8
D) 5
E) unknown

Question 27

What is the output of the following code fragment?
{
Int x=13;
Cout << x <<",";
}
Cout << x << endl;

A) 13,13
B) 0,13
C) 13,0
D) nothing, there is a syntax error.

Question 28

What is wrong with the following switch statement?
Int ans;
Cout <<"Type y for yes on n for no\n";
Cin >> ans;
Switch ans)
{
Case 'y':
Case 'Y': cout << "You said yes\n"; break;
Case 'n':
Case 'N': cout << "You said no\n"; break;
Default: cout <<"invalid answer\n";
}

A) ans is a int
B) break; is illegal syntax
C) nothing
D) there are no break statements on 2 cases.

Question 29

Given the following enumerated data type definition, what is the value of SAT?
Enum myType{SUN,MON,TUE,WED,THUR,FRI,SAT,NumDays};

A) 7
B) 6
C) 8
D) 5
E) unknown

Question 30

Which of the following boolean expressions tests to see if x is between 2 and 15 including 2 and 15)?

A) x<=15 || x>=2)
B) 2 <=x || x <=15)
C) x >=2 && x <=15)
D) 2 <= x <= 15)

Question 31

Which boolean operation is described by the following table?

A) or
B) and
C) not
D) none of the above

Question 32

What is the value of x after the following code executes?
Int x=10;
Ifx++ >10)
{
X =13;
}

A) 10
B) 9
C) 13
D) 11

Question 33

What is the output of the following code fragment if x is 15?
Ifx < 20)
Ifx <10)
Cout << "less than 10 ";
Else
Cout << "large\n";

A) less than 10
B) nothing
C) large
D) no output, syntax error

Question 34

Given the following code, what is the final value of i?
Int i,j;
Fori=0;i<4;i++)
{
Forj=0;j<3;j++)
{
Ifi==2)
Break;
}
}

A) 3
B) 4
C) 5
D) 0

Question 35

If you want a loop to quit iterating if x < 10 and y > 3, what would be the proper loop condition test?

A) x < 10 && y > 3)
B) x >10 || y < 3)
C) x >=10 && y <=3)
D) x >=10 || y <=3)

Question 36

How many times is "Hi" printed to the screen
Forint i=0;i<14;i++);
Cout <<"Hi\n";

A) 13
B) 15
C) 14
D) 1

Question 37

Which of the following is not a good reason for choosing a certain loop control?

A) What the loop does
B) The minimum number of iterations of the loop
C) The condition for ending the loop
D) If the loop is in a function

Question 38

What is the value of x after the following code executes?
Int x=10;
If ++x >10)
{
X =13;
}

A) 10
B) 9
C) 13
D) 11

Question 39

if x is 0, what is the value of !x ==0)?

A) false
B) true
C) unable to determine
D) A

Question 40

Which of the following are equivalent to !x<15 && y>=3))?

A) x>15 && y<=3)
B) x>=15 && y < 3)
C) x>=15 || y < 3)
D) x>15 || y < 3)
E) C and D

Question 41

What is NOT an advantage of an enum class over a standard enum?

A) Doesn't map to an integer
B) Values are not global in scope
C) Occupies less memory

Question 42

If you need to write a do-while loop that will ask the user to enter a number between 2 and 5 inclusive, and will keep asking until the user enters a correct number, what is the loop condition?

A) 2<=num<=5)
B) 2<5C) 2 <= number && number <= 5)
D) 2 < number || number > 5)
E) 2 > number && number > 5)

Question 43

Which of the following are valid case statements in a switch?

A) case 1:
B) case x<4:
C) case 'ab':
D) case 1.5:

Question 44

What is wrong with the following for loop?
Forint i=0;i<10;i--)
{
Cout << "Hello\n";
}

A) can not use a for-loop for this
B) i is not initialized
C) infinite loop
D) off-by-one error

Question 45

Which loop structure always executes at least once?

A) do-while
B) for
C) while
D) sentinel