Question 1

The decrement operator is ____________.
A) +=
B) --
C) -=
D) ++

Accepted Answer

The decrement operator (--) is used to decrease the value of a variable by 1.

Question 2

The ____________ is specifically designed for situations requiring a counter variable to control the number of times that a loop iterates.
A) while loop
B) if-else statement
C) for loop
D) switch statement

Accepted Answer

The for loop is specifically designed for situations requiring a counter variable to control the number of times that a loop iterates. It allows for the initialization, condition, and increment of a loop variable to be specified all in one line, making it a very convenient and widely-used loop structure in programming. The while loop can also be used in situations where a counter variable is needed, but it does not have the same level of built-in functionality for this purpose as the for loop. The if-else statement and switch statement are conditional statements used for making decisions based on certain conditions or inputs, and are not designed for iterating through a fixed number of iterations like a loop.

Question 3

Each time the loop executes its statement or statements, we say the loop is iterating, or performing a(n) ____________.
A) cycle
B) pass
C) execution
D) iteration

Accepted Answer

The term used for each repetition of a loop is called an iteration.

Question 4

____________ are commonly used to control the number of times that a loop iterates.
A) Boolean variables
B) Sentinel variables
C) Counter variables
D) Named constants

Accepted Answer

Counter variables are specifically designed to keep track of the number of times a loop has executed. The loop is exited when the counter reaches a certain value, thereby controlling the number of times the loop iterates.

Question 5

The ____________ begins with the word while, followed by a Boolean expression that is enclosed in parentheses.
A) conditional statement
B) logic mark
C) while clause
D) loop parameter

Accepted Answer

A "while clause" is the correct term for a statement that begins with the word "while," followed by a Boolean expression enclosed in parentheses, typically used to initiate a loop that continues as long as the Boolean expression evaluates to true.

Question 6

To ____________ a variable means to increase its value.
A) append
B) decrement
C) add
D) increment

Accepted Answer

Incrementing a variable means to increase its value. The other options are not relevant to increasing the value of a variable. "Append" means to add something to the end of a list or string. "Decrement" means to decrease the value of a variable. "Add" can mean to combine or join items, but it does not necessarily involve increasing a numerical value.

Question 7

The third expression that appears in the loop header of the for loop is the ____________, which executes at the end of each iteration, and it is typically the statement that increments the loop's counter variable.
A) test expression
B) update expression
C) initialization expression
D) increment expression

Accepted Answer

The update expression is the third expression in the for loop header and is responsible for changing the value of the loop's counter variable. This is typically achieved through an increment (i.e. i++) or a decrement (i.e. i--).

Question 8

The first expression that appears in the loop header of the for loop is the ____________, which is normally used to initialize a counter variable to its starting value.
A) update expression
B) test expression
C) Boolean expression
D) Initialization expression

Accepted Answer

The first expression in the loop header of a for loop is the initialization expression, and it is used to initialize the counter variable to its starting value.

Question 9

ListBox controls have an ____________ method that erases all the items in the Items property.
A) Items.Erase
B) Items.Remove
C) Items.Clear
D) Items.Reset

Accepted Answer

The Items.Clear method erases all the items in the Items property of ListBox controls.

Question 10

Because the for loop tests its Boolean expression before it performs an iteration, it is a ____________.
A) pretest loop
B) pseudo loop
C) posttest loop
D) infinite loop

Accepted Answer

The for loop tests its Boolean expression before it performs an iteration, which means it is a pretest loop.

Question 11

The statement or block of statements following the while clause is known as the ____________ of the loop.
A) assembly
B) body
C) definition
D) sequence structure

Accepted Answer

The block of statements following the while clause is known as the body of the loop. It contains the instructions that will be executed repeatedly as long as the loop condition is true.

Question 12

When the ++ and -- operators are written after their operands it is called ____________.
A) prefix mode
B) suffix mode
C) appendix mode
D) postfix mode

Accepted Answer

The ++ and -- operators written after their operands are called postfix operators or postfix mode. This is because they come after the variable they are operating on.

Question 13

ListBox controls have an ____________ property that reports the number of items stored in the ListBox.
A) Items.Count
B) Items.Size
C) Items.List
D) Items.Contains

Accepted Answer

The property Items.Count returns the number of items contained in the ListBox control. This is the best choice as it directly returns the count of items without the need for any further processing or iteration. The other options listed, such as Items.Size, Items.List, and Items.Contains, do not provide the same functionality and would require additional logic to determine the number of items in the ListBox control.

Question 14

To ____________ a variable means to decrease its value.
A) subtract
B) increment
C) decrement
D) supplement

Accepted Answer

To decrease a variable's value, we use the mathematical operation called "subtraction," and the operation that decreases a variable's value by a certain amount is called "decrement." Therefore, the correct answer is C, decrement. Choice A (subtract), Choice B (increment), and Choice D (supplement) are not correct because they do not specifically imply a decrease in value.

Question 15

The ++ and -- operators can be written before their operands, which is called ____________.
A) preface mode
B) postfix mode
C) prefix mode
D) superscript mode

Accepted Answer

The ++ and -- operators written before their operands are called prefix operators.

Question 16

The while loop is known as a ____________, which means it tests its condition before performing an iteration.
A) posttest loop
B) pretest loop
C) proactive loop
D) preemptive loop

Accepted Answer

The while loop is a pretest loop because it tests the condition before executing each iteration. It is called a pretest loop because it checks the condition before executing the loop body.

Question 17

If a loop does not have a way of stopping, it is called a(n) ____________.
A) runaway loop
B) game loop
C) infinite loop
D) expressionless loop

Accepted Answer

An infinite loop is a loop that runs indefinitely and does not have a way of stopping. This can cause the program to crash or result in unexpected behavior. Therefore, it is important to avoid infinite loops in programming.

Question 18

To add an item to a ListBox control with code, you call the control's ____________method.
A) Add.Items
B) Items.Add
C) Items.Append
D) Items.Insert

Accepted Answer

The correct method to add an item to a ListBox control with code is Items.Add. This method adds the specified item to the end of the collection. Therefore, the correct choice is B.

Question 19

The increment operator is ____________.
A) --
B) ++
C) -=
D) +=

Accepted Answer

The increment operator is represented by ++ and is used to increase the value of a variable by 1. Option A represents the decrement operator --, which is used to decrease the value of a variable by 1. Options C and D are compound assignment operators used to subtract and add a value to a variable, respectively.

Question 20

The second expression that appears in the loop header of the for loop is the _____________, which is a Boolean expression that controls the execution of the loop.
A) test expression
B) update expression
C) initialization expression
D) control expression

Accepted Answer

The test expression in the loop header is a Boolean expression that determines whether the loop should continue executing or not. It is evaluated at the beginning of each iteration and if it evaluates to true, the loop continues executing. If it evaluates to false, the loop terminates.

Quiz 5: Loops, Files, and Random Numbers

The decrement operator is ____________.

The ____________ is specifically designed for situations requiring a counter variable to control the number of times that a loop iterates.

Each time the loop executes its statement or statements, we say the loop is iterating, or performing a(n) ____________.

____________ are commonly used to control the number of times that a loop iterates.

The ____________ begins with the word while, followed by a Boolean expression that is enclosed in parentheses.

To ____________ a variable means to increase its value.

The third expression that appears in the loop header of the for loop is the ____________, which executes at the end of each iteration, and it is typically the statement that increments the loop's counter variable.

The first expression that appears in the loop header of the for loop is the ____________, which is normally used to initialize a counter variable to its starting value.

ListBox controls have an ____________ method that erases all the items in the Items property.

Because the for loop tests its Boolean expression before it performs an iteration, it is a ____________.

The statement or block of statements following the while clause is known as the ____________ of the loop.

When the ++ and -- operators are written after their operands it is called ____________.

ListBox controls have an ____________ property that reports the number of items stored in the ListBox.

To ____________ a variable means to decrease its value.

The ++ and -- operators can be written before their operands, which is called ____________.

The while loop is known as a ____________, which means it tests its condition before performing an iteration.

If a loop does not have a way of stopping, it is called a(n) ____________.

To add an item to a ListBox control with code, you call the control's ____________method.

The increment operator is ____________.

The second expression that appears in the loop header of the for loop is the _____________, which is a Boolean expression that controls the execution of the loop.