Question 1

What is the value of the following expression: 9 * 2 - 8 > 5 + 2 / 2?

Accepted Answer

The expression evaluates as follows: 9 * 2 - 8 > 5 + 2 / 2 simplifies to 18 - 8 > 5 + 1, which further simplifies to 10 > 6. This statement is true, so the correct answer is True.

Question 2

The expression 12 > 0 AndAlso 12 < 10 * 2 evaluates to True.

Accepted Answer

The expression evaluates to true because both conditions are true: 12 is greater than 0, and 12 is less than 20 (10 * 2).

Question 3

Comparison operators are always evaluated after arithmetic operators in a conditional expression.

Accepted Answer

In the order of operations, arithmetic operators (such as +, -, *, /) are evaluated before comparison operators (such as ==, !=, >, <), so any arithmetic within a conditional expression is performed prior to the comparison.

Question 4

When coding a selection instruction in Visual Basic,the code that follows the Else statement includes those instructions that will be executed when the condition is true.

Accepted Answer

The code that follows the Else statement in a selection instruction will be executed when the condition is false, not true. The code that follows the If statement will be executed when the condition is true.

Question 5

The ____ operator is evaluated first in the following expression: 9 * 2 - 8 > 5 + 2 / 2.

Accepted Answer

The multiplication (*) operator is evaluated first due to the order of operations in mathematics, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

Question 6

You can include an identifying label on a group box by setting the group box's Identity property.

Accepted Answer

The statement is incorrect. Group boxes do not have an Identity property. However, they do have a Text property, which can be used to provide a label or title for the group box.

Question 7

If the intInventory variable contains the value 28,the condition If intInventory <= 25 Then will evaluate to ____.

Accepted Answer

The condition evaluates to False because intInventory (28) is greater than 25, not less than or equal to 25.

Question 8

The diamond symbol is used in a flowchart for a calculation task.

Accepted Answer

The diamond symbol in a flowchart represents a decision point, not a calculation task.

Question 9

The ____ operator is evaluated last in the following expression: 9 * 2 - 8 > 5 + 2 / 2.

Accepted Answer

The order of operations (PEMDAS) requires that multiplication and division are performed before addition and subtraction. Therefore, 2/2 is evaluated first, resulting in 1. Then, multiplication and subtraction are performed from left to right, resulting in 9*2=18 and 18-8=10. Finally, addition is performed and the expression becomes 10 > 5+1. The relational operator ">" is evaluated last, and the whole expression evaluates to True.

Question 10

The ____ operator expresses "not equal to."

Accepted Answer

The "<>" operator is commonly used in programming languages to express "not equal to." Option A ">" denotes "greater than," Option C ">=" denotes "greater than or equal to," and Option D "<=" denotes "less than or equal to," none of which express "not equal to."

Question 11

Which of the following conditions will evaluate to True when the intPackages variable contains the value 100?

Accepted Answer

All the conditions provided would evaluate to True when intPackages contains the value 100. Condition A directly checks if intPackages is equal to 100, Condition B checks if intPackages is not equal to 0 (which is true for 100), and Condition C checks if intPackages is greater than 1 (which is also true for 100).

Question 12

The Not operator would make a True statement False,but would not make a False statement True.

Accepted Answer

The Not operator inverts the truth value of a statement, making a True statement False and a False statement True.

Question 13

If dblMiles >= 500 Then dblMiles = dblMiles * 0.45
Else
DblMiles = dblMiles * 0.25
End If
The dblMiles variable contains the number 575 before the code above is processed.What value will be in the variable after the code is processed?

Accepted Answer

Since dblMiles is greater than or equal to 500, the first condition is true and dblMiles will be multiplied by 0.45. Therefore, after the code is processed, dblMiles will equal 258.75.

Question 14

Use the ____ flowchart symbol to represent the condition in both the selection and repetition structures.

Accepted Answer

The diamond flowchart symbol is used to represent a condition, which is a crucial aspect of both selection and repetition structures. This is because these structures involve making decisions (selection) or repeating a set of instructions based on a condition (repetition). Therefore, the diamond symbol is the best choice to represent the condition in both structures.

Question 15

The And operator always checks both conditions,while the AndAlso operator does not always evaluate the second condition.

Accepted Answer

The And operator always checks both conditions, irrespective of the first condition result. The AndAlso operator, on the other hand, doesn't evaluate the second condition if the first condition is false, for efficiency purposes.

Question 16

A programmer must phrase the condition of a selection structure so that it results in either a true or a false answer only.

Accepted Answer

This is because the condition of a selection structure is typically a boolean expression, which can only result in a true or false value. The selection structure then uses this value to determine which branch of code to execute.

Question 17

A variable that has ____ scope can be used anywhere within the procedure.

Accepted Answer

A variable with procedure scope can be accessed anywhere within the procedure in which it is declared. It cannot be accessed outside of the procedure. Block scope applies to variables declared within a specific block of code (curly brackets), while statement scope applies to variables declared within a single statement. Method scope is not a term commonly used in programming languages.

Question 18

Before using a string in a comparison,you can use either the ToUpper method or the ToLower method to convert the string to uppercase or lowercase,respectively,and then use the converted string in the comparison.

Accepted Answer

This statement is true. Using ToUpper or ToLower method can help to avoid case sensitivity issues while comparing strings.

Question 19

The expression 2 * 3 + 1 > 1 * 2 + 3 Or 7 + 2 < 4 + 1 evaluates to False.

Accepted Answer

2 * 3 + 1 > 1 * 2 + 3 translates to 7 > 5, which is True. 7 + 2 < 4 + 1 translates to 9 < 5, which is False. The entire expression uses the logical operator "Or," so if either of the two sub-expressions is True, the entire expression would be True. However, since the second sub-expression is False, the entire expression is False.

Question 20

Comparison operators are also referred to as ____ operators.

Accepted Answer

Comparison operators are used to compare two values and return a Boolean value of either true or false. They include operators such as equal to (==), not equal to (!=), less than (<), greater than (>), less than or equal to (<=), and greater than or equal to (>=). These operators are also known as relational operators because they indicate the relationship between the two values being compared.

Quiz 4: The Selection Structure