Exam 3: Using Variables and Constants

Problems - Correcting Code Errors The following sample of code contains errors. Rewrite the incorrect statements to correct all errors. Dim strPROMPT As String = "Please enter an employee code:" Const strTITLE As String = Employee Data 'assign the code to a variable strCode = InputBox(strTITLE, strPROMPT)

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Question 1

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Const strPROMPT As String = "Please enter an employee code:"
Const strTITLE As String = "Employee Data"
strCode = InputBox(strPROMPT, strTITLE)

A memory variable that is a Double data type requires ____ bytes of storage.

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What is a TextChanged event? How can it be used within an application?

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A control's TextChanged event occurs when a change is made to the contents of the control's Text property. This can happen as a result of either the user entering data into the control, or the application's code assigning data to the control's Text property. It can be used to clear the contents of controls when the user changes a value of another control.

Case-Based Critical Thinking Questions Case 1 - PetPals You have been hired by PetPals Veterinary Clinic to modify an application. The application is used to enter and save all patient (pet) information obtained during an office visit. The data entered by the users is currently stored in properties of controls of the form. Your first task to improve the application is to ____.

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Question 4

The decBalance variable contains the number 1368.52. Write the assignment statement to display the value with a dollar sign, a thousands separator, and two decimal places in the lblBalance control.

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Question 5

Which of the following statements formats the contents of the dblPay variable with a dollar sign and no decimal places?

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Question 6

When a button is selected, the computer processes the code contained in the button's ____ event procedure.

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Question 7

You declare a class-level variable using the ____ keyword.

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Question 8

Case-Based Critical Thinking Questions Case 1 - PetPals You have been hired by PetPals Veterinary Clinic to modify an application. The application is used to enter and save all patient (pet) information obtained during an office visit. The veterinarian wants to document and display the name of the technician who performs the initial evaluation of the pet. You decide to use an InputBox function to prompt the user to enter this data first. The InputBox function should be coded in the ____.

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Question 9

The ____ clause in an event procedure's header indicates the object and event associated with the procedure.

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Question 10

A variable that was not assigned a specific data type is assigned the ____ data type.

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Question 11

You can eliminate the problems that occur as a result of implicit type conversions by entering the Option Explicit On statement in the General Declarations section of the Code Editor window.

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Question 12

A Boolean variable is initialized to the value True if no initial value is stated when the variable is declared.

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Question 13

The line continuation character is a(n) ____.

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Question 14

You use the ____ operator to concatenate strings together.

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Question 15

The Decimal, Double, and Single variable data types can all store what type of numeric data? Explain the differences among these three data types and problems that can occur with their use.

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Question 16

If Option Strict is set to On, which of the following statements will assign the contents of the txtLateFee control to a Decimal variable named decLateFee ?

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Question 17

Calculations involving Decimal variables are not subject to the small rounding errors that may occur when using Double or Single variables.

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Question 18

Case-Based Critical Thinking Questions Case 1 - PetPals You have been hired by PetPals Veterinary Clinic to modify an application. The application is used to enter and save all patient (pet) information obtained during an office visit. The pet's temperature is recorded at every visit, and it may contain a decimal place. What data type is best for storing this data?

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Question 19

A named constant's value cannot be changed while the application is running.

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Question 20

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A memory variable that is a Double data type requires ____ bytes of storage.

What is a TextChanged event? How can it be used within an application?

The decBalance variable contains the number 1368.52. Write the assignment statement to display the value with a dollar sign, a thousands separator, and two decimal places in the lblBalance control.

Which of the following statements formats the contents of the dblPay variable with a dollar sign and no decimal places?

When a button is selected, the computer processes the code contained in the button's ____ event procedure.

You declare a class-level variable using the ____ keyword.

The ____ clause in an event procedure's header indicates the object and event associated with the procedure.

A variable that was not assigned a specific data type is assigned the ____ data type.

You can eliminate the problems that occur as a result of implicit type conversions by entering the Option Explicit On statement in the General Declarations section of the Code Editor window.

A Boolean variable is initialized to the value True if no initial value is stated when the variable is declared.

The line continuation character is a(n) ____.

You use the ____ operator to concatenate strings together.

The Decimal, Double, and Single variable data types can all store what type of numeric data? Explain the differences among these three data types and problems that can occur with their use.

If Option Strict is set to On, which of the following statements will assign the contents of the txtLateFee control to a Decimal variable named decLateFee ?

Calculations involving Decimal variables are not subject to the small rounding errors that may occur when using Double or Single variables.

A named constant's value cannot be changed while the application is running.

An Introduction to Visual Basic 2015

Designing Applications

The Selection Structure

More on the Selection Structure

The Repetition Structure

Sub and Function Procedures

String Manipulation

Arrays

Structures and Sequential Access Files

Classes and Objects

Web Applications

Working With Access Databases and Linq

Access Databases and Sql

Filters