Deck 4: Making Decisions

Question 1

The ____________ has two possible paths of execution - one path is taken if the Boolean expression is true, and the other path is taken if the Boolean expression is false.

A) dual-alternative decision structure
B) comparative structure
C) multi-decision structure
D) branching structure

Answer 1

A

Question 2

A(n) ____________ decision structure provides only one alternative path of execution.

A) alternate path
B) single-alternative
C) single path
D) ordered path

Answer 2

B

Question 3

When a RadioButton or a CheckBox control's Checked property changes, a ____________ happens for that control.

A) SelectionChanged event
B) Checked event
C) CheckChanged event
D) Click event

Answer 3

C

Question 4

A(n) ____________ is a set of statements that execute in the order that they appear.

A) control structure
B) ordered structure
C) command structure
D) sequence structure

Question 5

A(n) ____________ compares the values of two expressions.

A) relational operator
B) bitwise assessment
C) associative operator
D) comparative structure

Question 6

A(n) ____________ can execute a set of statements only under certain circumstances.

A) sequence structure
B) decision structure
C) circumstantial structure
D) event structure

Question 7

A ____________ appears as a small box with some accompanying text.

A) list box
B) link
C) check box
D) radio button

Question 8

In Visual C#, you use the ____________ to create a list box on an application's form.

A) ListView control
B) MaskedTextBox control
C) CheckedListBox control
D) ListBox control

Question 9

An action that is ____________ occurs only when a certain condition is true.

A) conditionally executed
B) logically executed
C) interactively driven
D) truth bound

Question 10

When the user selects an item in a ListBox, the item's index is stored in the Listbox's ____________ property.

A) DataValue
B) SelectedIndex
C) Index
D) ValueIndex

Question 11

When the user selects an item in a ListBox, the item is stored in the ListBox's ____________ property.

A) Checked
B) SelectedValue
C) DataSelection
D) SelectedItem

Question 12

The ____________ is a multiple-alternative decision structure, which allows you to test the value of a variable or an expression and then use that value to determine which statement or set of statements to execute.

A) switch statement
B) if statement
C) try-catch statement
D) else statement

Question 13

A ____________ is an expression that can be evaluated as either

A) binary expression
B) double expression
C) Boolean expression
D) classical expression

Question 14

When you want to create a check box on a form, you use the ____________, which is found in the Common Controls section of the Toolbox.

A) CheckBox control
B) RadioButton control
C) ListBox control
D) LinkLabel control

Question 15

A(n) ____________ is a logical design that controls the order in which a set of statements execute.

A) elementary structure
B) logic structure
C) control structure
D) sequence structure

Question 16

Which one of the following expressions determines whether the value of the length variable is greater than or equal to the value of the width variable?

A) length < width
B) width <= length
C) length > width
D) length >= width

Question 17

Which one of the following expressions determines if the value of the balance variable is equal to zero?

A) 0 = balance
B) balance == 0
C) balance = 0
D) balance <= 0

Question 18

If no item is selected in a ListBox, what value is in the SelectedIndex property?

A) false
B) true
C) 0
D) −1

Question 19

Each item in a ListBox has a(n) ____________, which is an integer that identifies the item's position in the ListBox.

A) index
B) list number
C) unique identifier
D) table key

Question 20

Once you create a ListBox control, you add items you wish to display to its ____________.

A) Display property
B) Text property
C) Items property
D) Values property

Question 21

A string can be converted to a decimal with the ____________ method.

A) decimal.ParseString
B) decimal.ToString
C) Try.Parse(decimal)
D) decimal.TryParse

Question 22

A(n) ____________ statement has two parts: an if clause and an else clause.

A) logic
B) if-else
C) Boolean
D) else-if

Question 23

The ____________ operator is the logical NOT operator, which is a unary operator that takes a Boolean expression as its operand and reverses its logical value.

A) <>
B) !
C) &&
D) ||

Question 24

C# provides a special version of the decision structure known as the ____________, which simplifies the logic for testing a series of conditions.

A) if-else-if statement
B) else-try statement
C) series statement
D) multi-condition logic structure

Question 25

A(n) ____________ is a variable that often signals the value of a Boolean condition.

A) sentinel
B) flag
C) event
D) marker

Question 26

The expression (A < 1) XX (A > 10) will determine if the value in A is outside a range, if "XX" is replaced by which logical operator?

A) &&
B) !
C) ||
D) >=

Question 27

To convert a string to a double, use the ____________ method.

A) String.ToDouble
B) double.TryParse
C) Try.ParseDouble
D) ToString

Question 28

The ____________ keyword is required when specifying a variable as an output argument.

A) in
B) out
C) extern
D) static

Question 29

____________ are decision structures that appear inside other decision structures.

A) paired decision structures
B) hidden decision structures
C) dual decision structures
D) nested decision structures

Question 30

The ____________ operator is the logical AND operator, which takes two Boolean expressions as operands and creates a compound Boolean expression that is true only when both subexpressions are true.

A) !
B) <>
C) &&
D) ||

Question 31

The ____________ method can be used to determine whether one string is greater than or less than another string.

A) String.Equals
B) String.Compare
C) String.IsGreater
D) String.String

Question 32

The ____________ method can be used to convert a string to an integer.

A) Try.Parse.int
B) int.Parse
C) int.TryParse
D) TryParse.int

Question 33

A(n) ____________ is a variable that is passed as an argument to a method, and when the method is finished, a value is stored in the variable.

A) output variable
B) result variable
C) parameter variable
D) method variable

Question 34

The expression (A >= 1) XX (A <= 10) will determine if the value in A is inside a range, if "XX" is replaced by which logical operator?

A) &&
B) !
C) ||
D) >=

Question 35

The ____________ method can determine whether a string contains a value that can be converted to a specific data type before it is converted to that data type.

A) Parse
B) TryParse
C) Peek
D) String.Compare

Question 36

The ____________ operator is the logical OR operator, which takes two Boolean expressions as operands and creates a compound Boolean expression that is true when either of the subexpressions is true.

A) !
B) &&
C) <>
D) ||

Question 37

Both the && and || operators perform ____________, in which CPU time is saved by not checking the expression on the right side of the operator depending on the value of the expression on the left side of the operator.

A) logical optimization
B) short-circuit evaluation
C) cycle-branching
D) single-stage execution

Question 38

The C# language provides a set of operators known as ____________, which you can use to create complex Boolean expressions.

A) Boolean operators
B) relational operators
C) logical operators
D) expressional operators

Question 39

You can use the ____________ operator to compare two strings.

A) ||
B) &&
C) ==
D) !

Question 40

The C# language provides the ____________ data type that you can use to create variables that hold

A) bool
B) int
C) Boolean
D) double

Question 41

In a flowchart, the diamond symbol indicates some condition that must be tested.

Question 42

A series of deeply nested if-else statements is usually easier to follow than the logic of an if-else-if statement.

Question 43

Decision structures are also known as selection structures.

Question 44

For an || expression to be true, the expression on the left side of the || operator must be false.

Question 45

If the expression on the left side of the || operator is true, the expression on the right side is not checked.

Question 46

When you want to create a group of radio buttons on a form, you use the ____________, which is found in the Common Controls section of the Toolbox.

A) RadioButton control
B) ListBox control
C) ListView control
D) ComboBox control

Question 47

____________ works by automatically deselecting any other items in the same group when a single item is selected.

A) multiple selection
B) mutually inclusive selection
C) mutually exclusive selection
D) monographic selection

Question 48

RadioButton controls have a ____________ property that determines whether the control is selected or deselected.

A) Selected
B) Checked
C) Pushed
D) Active

Question 49

The equality operator consists of just one equals sign (=).

Question 50

Boolean expressions are named in honor of the English rock star James Boole, who developed his mathematical theories while studying instrument acoustics.

Question 51

The sequence structure is often used in programming because it can handle every type of task.

Question 52

In order for an && expression to be true, only the expression on one side of the && operator needs to be true.

Question 53

The process of checking input for errors before it is processed is called ____________.

A) parsing
B) input validation
C) pre-rendering
D) data authentication

Question 54

It is often true that both sets of conditionally executed statements are executed in an if-else statement.

Question 55

____________ are useful when you want the user to select one choice from several possible choices.

A) Radio buttons
B) Check boxes
C) Buttons
D) Text boxes

Question 56

For debugging purposes, it's important to use proper alignment and indentation in a nested if statement.

Question 57

Any if-else-if statement can alternatively be coded as a nested if-else statement.

Question 58

In C#, you use the if statement to write a single-alternative decision structure.

Question 59

If you are writing an if statement that has only one conditionally executed statement, you must enclose the conditionally executed statement in curly braces.

Question 60

In code we write a dual-alternative decision structure as an if-else statement.

Question 61

Check boxes are similar to radio buttons, in that they are both mutually exclusive.

Question 62

When displaying an item from a ListBox, you have to call the SelectedItem property's ToString method to retrieve the value as a string.

Question 63

The name radio button refers to the old car radios that had push buttons for selecting stations where only one button could be pushed in at a time.

Question 64

When a program compares characters, it actually compares the numeric Unicode values of the characters.

Question 65

You should use try-catch statements primarily for exceptions that are beyond your control.

Question 66

A well-designed program should validate the contents of multiple TextBoxes in a single statement.

Question 67

RadioButton controls have a Text property, which hold the text that is displayed next to the radio button's circle.

Question 68

Once you create a ListBox control, you add items to its Collection property.

Question 69

To create a CheckChanged event handle for a RadioButton or a CheckBox, double-click the control in the Designer.

Question 70

RadioButton controls are grouped according to the container in which they are placed.

Question 71

The && and || logical operators have a higher precedence than the relational operators.

Question 72

The ! operator has a higher precedence than the relational operators (such as < or >).

Question 73

Because the TryParse methods return either

Question 74

The == operator cannot be used to compare string expressions.

Question 75

If an expression A is true, prefixing it with the ! operator causes the combined expression to become false, as in !A.

Question 76

The saying "garbage in, garbage out" refers to the fact that computers cannot tell the difference between good input and bad input.

Question 77

Variables of the double data type are commonly used as flags.

Question 78

A switch statement's test expression can be any data type.