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Exam 10: Structures and Sequential Access Files

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Question 31

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Case 1 - Frames Unlimited Frames Unlimited is a wholesale picture and poster frame business. Frame data is stored in sequential access files that contain four columns: item number, item name, size, and price. -An application uses the posterFrame.txt sequential access file to display all of the poster frames in a list box.You need to use the list box to select and remove any poster frames that are 16x20.Which of the following statements determines if a line is selected in the list box?

A) if lstPosters.SelectedIndex <> -1 Then
B) if lstPosters.Selected <> -1 Then
C) if lstPosters.SelectedIndex = -1 Then
D) if lstPosters.Selected = -1 Then

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Question 32

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Write the statement that would remove the item "RGT12985" from the lstPartNumber control.

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lstPartNum...

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Question 33

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Write an If clause that determines whether the sequential access file named contacts.txt exists.If the file exists,open the file.If the file does not exist,display the message "File not found" in a message box.The application is named "View Contacts".

You should use the ____ method to close a sequential access file as soon as you are finished using it.

You cannot include an array in a structure.

Case 1 - Frames Unlimited Frames Unlimited is a wholesale picture and poster frame business. Frame data is stored in sequential access files that contain four columns: item number, item name, size, and price. -You should ____ the pictureFrame.txt file as soon as you have finished using it.

In Visual Basic,you use a(n) ____ to write a stream of characters to a sequential access file.

Write the code to declare a variable named outFile that can be used to write data to a sequential access file.Then write the statement to open a sequential access file named customers.txt for output.

What is the difference between an input file and an output file?

You reserve memory locations by declaring a structure variable.

Which of the following statements can be used to fill a string variable with asterisks resulting in "*****$675.89"?

In Visual Basic,you use a(n) ____ to read data from a sequential access file.

Which of the following statements will read data from a sequential access file?

Write a Structure statement that defines a structure named Order.The structure contains four member variables named strItemNum,strItemDesc,decPrice,and intQuantity.Then write the Dim statement that declares an Order variable named furniture.

You use the ____ member access operator to separate the structure variable's name from the member variable's name.

Which of the following opens the employee.txt file for output,creates a StreamWriter object,and assigns it to the outFile variable?

Which of the following removes the sixth item from the lstTrees control?

Write the statement that would remove the selected item from the lstFlowers control if an item is selected.

An application contains the Structure statement shown below: Structure SalonInfo Public strService As String Public intRate As integer End Structure Write a Dim statement that declares an eight-element one-dimensional array of SalonInfo variables.Name the array mySalonInfo.Write the code to store the following data in the array: $\begin{array} { | l | l | } \hline \text { haircut } & 50 \\\hline \text { haircol or } & 85 \\\hline \text { blowdry } & 35 \\\hline \text { facial } & 65 \\\hline\end{array}$

In addition to getting data from the keyboard and sending data to the computer screen,an application can also get data from and send data to a file on a disk.