Deck 4: Making Decisions

Question 1

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

Answer 1

D

Question 2

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 2

A

Question 3

Which one of the following operators is the best choice when determining if a number is outside a range?

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

Answer 3

C

Question 4

A(n) ____________ determines whether a specific relationship exists between two values.

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

Question 5

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 6

____________ 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 7

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

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

Question 8

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 9

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 10

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 11

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 12

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) 0 == balance

Question 13

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 14

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) logic structure

Question 15

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

A) unique-alternative
B) single-alternative
C) duel-alternative
D) direct-alternative

Question 16

A ____________ is an expression that can be evaluated as either.

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

Question 17

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 18

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 19

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 20

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

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

Question 21

A(n) ____________ is a variable that signals when some condition exists in a program.

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

Question 22

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 23

Anytime 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

Question 24

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

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

Question 25

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 26

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

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

Question 27

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 28

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

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

Question 29

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 30

The process of inspecting input before it is processed is called ____________.

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

Question 31

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 32

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 33

You can use the ____________ operator to compare two strings.

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

Question 34

____________ 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 35

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 36

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

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

Question 37

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 38

With the ____________ methods, you 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) Preemptive
B) TryParse
C) Peek
D) String.Compare

Question 39

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

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

Question 40

____________ 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 41

If the expression is true, the ! operator returns false, and if the expression is false, the ! operator returns true.

Question 42

All it takes for an && expression to be true is for one side of the && operator to be true.

Question 43

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

A) false
B) true
C) 0
D) -1

Question 44

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

Question 45

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 46

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 47

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

Question 48

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

Question 49

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

Question 50

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 51

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

Question 52

Under no circumstances are both sets of conditionally executed statements executed in an if-else statement.

Question 53

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

Question 54

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

Question 55

Decision structures are also known as selection structures.

Question 56

Boolean expressions are named in honor of the English mathematician George Boole.

Question 57

You never have to use the if-else-if statement because its logic can be coded with nested if-else statements.

Question 58

The items that are stored in a ListBox each have a(n) ____________, which is simply a number that identifies the item's position in the ListBox.

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

Question 59

The equality operator is one = symbol.

Question 60

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

Question 61

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

Question 62

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

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

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

Question 65

You cannot compare string variables with string literals.

Question 66

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

Question 67

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

Question 68

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

Question 69

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

Question 70

When determining whether a number is inside a range, it is best to use the && operator.

Question 71

RadioButton controls are grouped depending on the container in which they are placed.

Question 72

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 73

The && and || logical operators have lower precedence than the relational operators, while the ! operator has higher precedence than the relational operators.

Question 74

Because the TryParse methods return either, they are commonly called as the Boolean expression in an if statement.

Question 75

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

Question 76

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

Question 77

When a program compares characters, it actually compares the codes for the characters.