Cs Test 2

Front 1

Describe the difference between the if/else if statement and a series of its statements.

Front 2

In an if/else if statement, what is the purpose of a trailing else?

Front 3

What is a flag and how does it work?

Front 4

Can an if statement test expressions other than relational expressions? Explain.

Front 5

Briefly describe how the && operator works.

Front 6

Briefly describe how the || operator works.

Front 7

Why are the relational operators called relational?

Front 8

Why do most programmers indent the conditionally executed statements in a decision structure?

Front 9

An expression using the greater-than, less-than, greater-than-or-equal-to, less-than-or-equal-to, or not-equal to operator is called a(n) ____________ expression.

Back 9

Relational

Front 10

A relational expression is either ___________ or __________.

Back 10

True, false

Front 11

The value of a relational expression is 0 if the expression is ___________ or 1 if the expression is ___________.

Back 11

False, true

Front 12

For an if statement to conditionally execute a group of statements, the statements must be enclosed in a set of ___________.

Back 12

Braces

Front 13

In an if/else statement, the if part executes its statement or block if the expression is ___________, and the else part executes its statement or block if the expression is ___________.

Back 13

True, false

Front 14

The trailing else in an if/else if statement has a similar purpose as the ___________ section of a switch statement.

Back 14

Default

Front 15

The if/else if statement is actually a form of the ___________ if statement.

Back 15

Nested

Front 16

If the sub-expression on the left of the ___________ logical operator is false, the right expression is not checked.

Back 16

&&

Front 17

If the sub-expression on the left of the ___________ logical operator is true, the right expression is not checked.

Back 17

||

Front 18

The ___________ logical operator has higher precedence than the other logical operators.

Back 18

!

Front 19

The logical operators have a ___________ associativity.

Back 19

Left/right

Front 20

The ___________ logical operator works best when testing a number to determine if it is within a range.

Back 20

&&

Front 21

The ___________ logical operator works best when testing a number to determine if it is outside a range.

Back 21

||

Front 22

A variable with ___________ scope is only visible when the program is executing in the block containing the variable's definition.

Back 22

Block

Front 23

You use the ___________ operator to determine whether one string object is greater than another string object.

Back 23

>

Front 24

An expression using the conditional operator is called a(n) ___________ expression.

Back 24

Conditional

Front 25

The expression that is tested by a switch statement must have a(n) ___________ value.

Back 25

Integer or char

Front 26

The expression following case statement must be a(n) ___________.

Back 26

Integer or char

Front 27

A program will "fall through" a case section if it is missing the ___________ statement.

Back 27

Break

Front 28

What value will be stored in the variable t after each of the following statements executes?

A) t=(12>1)

B) t=(2<0)

C) t=(5==3*2)

D) t=(5==5)

Back 28

A) 1

B) 0

C) 0

D) 1

Front 29

T/F The = operator and the == operator perform the same operation when used in a Boolean expression.

Back 29

False

Front 30

T/F A variable defined in an inner block may not have the same name as a variable defined in the outer block.

Back 30

False

Front 31

T/F A conditionally executed statement should be indented one level from the if statement.

Back 31

True

Front 32

T/F All lines in a block should be indented one level.

Back 32

True

Front 33

T/F It's safe to assume that all uninitialized variables automatically start with 0 as their value.

Back 33

False

Front 34

T/F When an if statement is nested in the if part of another statement, as in an if/else if, the only time the inner is executed is when the expression of the outer is true.

Back 34

False

Front 35

T/F The scope of a variable is limited to the block in which is is defined.

Back 35

True

Front 36

T/F You can use the relational operators to compare string objects.

Back 36

True

Front 37

T/F x!=y is the same as (x>y||x<y)

Back 37

True

Front 38

T/F y<x is the same as x>=y

Back 38

False

Front 39

T/F x>=y is the same as (x>y&&x=y)

Back 39

False

Front 40

To ___________ a value means to increase it by one, and to ___________ a value means to decrease it by one.

Back 40

Increment, decrement

Front 41

When the increment or decrement operator is placed before the operant (or to the operand's left), the operator is being used in ___________ mode.

Back 41

Prefix

Front 42

When the increment or decrement operator is placed after the operand (or to the operand's right), the operator is being used in ___________ mode.

Back 42

Postfix

Front 43

The statement or block that is repeated is known as the ___________ of the loop.

Back 43

Body

Front 44

Each repetition of a loop is known as a(n)___________.

Back 44

Iteration

Front 45

A loop that evaluates its test expression before each repetition is a(n) ___________ loop.

Back 45

Pretest

Front 46

A loop that evaluates its test expression after each repetition is a(n) ___________ loop.

Back 46

Posttest

Front 47

A loop that does not have a way of stopping is a(n) ___________ loop.

Back 47

Infinite/endless

Front 48

A(n) ___________ is a variable that counts the number of times a loop repeats.

Back 48

Counter

Front 49

A(n) ___________ is a sum of numbers that accumulates with each iteration of a loop.

Back 49

Running total

Front 50

A(n) ___________ is a variable that is initialized to some starting value, usually zero, and then has numbers added to it in each iteration of a loop.

Back 50

Accumulator

Front 51

A(n) ___________ is a special value that marks the end of a series of values.

Back 51

Sentinal

Front 52

The ___________ loop always iterates at least once.

Back 52

Do-while

Front 53

The ___________ and ___________ loops will not iterate at all if their test expressions are false to start with.

Back 53

While, for

Front 54

The ___________ loop is ideal for situations that require a counter.

Back 54

For

Front 55

Inside the for loop's parentheses, the first expression is the ___________, the second expression is the ___________, and the third expression is the ___________.

Back 55

Initialization, test, update

Front 56

A loop that is inside another is called a(n) ___________ loop.

Back 56

Nested

Front 57

The ___________ statement causes a loop to terminate immediately.

Back 57

Break

Front 58

The ___________ statement causes a loop to skip the remaining statements in the current iteration.

Back 58

Continue

Front 59

T/F The operand of the increment and decrement operators can be any valid mathematical expression.

Back 59

False

Front 60

T/F The cout statement in the following program segment will display 5:

intx=5;

cout<<x++;

Back 60

True

Front 61

T/F The cout statement in the following program segment will display 5:

int x=5;

cout<<++x;

Back 61

False

Front 62

T/F The while loop is a pretest loop.

Back 62

True

Front 63

The do-while loop is a pretest loop.

Back 63

False

Front 64

The for loop is a posttest loop

Back 64

False

Front 65

T/F It is not necessary to initialize counter variables.

Back 65

False

Front 66

T/F All three of the for loop's expressions may be omitted.

Back 66

True

Front 67

T/F One limitation of the for loop is that only one variable may be initialized in the initialization expression.

Back 67

False

Front 68

T/F Variables may be defined inside the body of a loop.

Back 68

True

Front 69

T/F A variable may be defined in the initialization expression of the for loop.

Back 69

True

Front 70

T/F In a nested loop, the outer loop executes faster than the inner loop.

Back 70

False

Front 71

T/F In a nested loop, the inner loop goes through all of its iterations for every single iteration of the outer loop.

Back 71

True

Front 72

T/F To calculate the total number of iterations of a nested loop, add the number of iterations of all the loops.

Back 72

False

Front 73

T/F The break statement causes a loop to stop the current iteration and begin the next one.

Back 73

False

Front 74

T/F The continue statement causes a terminated loop to resume.

Back 74

False

Front 75

T/F In a nested loop, the break statement only interrupts the loop it is placed in.

Back 75

True

Front 76

T/F When you call an ofstream object's open member function, the specified file will be erased if it already exists.

Back 76

False