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Exam 10: Structures and Sequential Access Files

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Question 1

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Which of the following can be used to determine whether the accounts.txt file exists?

A) If IO.Exists.File("accounts.txt") Then
B) If IO.File.Exists("accounts.txt") Then
C) If IO.File("accounts.txt") Then
D) If IO.Exists("accounts.txt") Then

E) None of the above
F) B) and C)

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Question 2

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Data types created using the Structure statement are referred to as user-defined data types or structures.

A) True
B) False

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Question 3

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Files that are read by the computer are called ____ files.

Most programmers use the Structure statement,rather than the Class statement,to create data types that contain procedures.

Write a Do clause that reads each line of text in a sequential access file and assigns the line to the strTextLine variable.Process the loop until the end of the file has been reached.The file is associated with a StreamReader variable named inFile.

Which of the following statements will close the sequential access file associated with the outFile variable?

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. -Which of the following statements should be used first when opening the input file?

Programmers use structure variables to store related items in an array,even when the items have different data types.

After opening a file for input,you can use the ____ to read the file's contents,one line at a time.

The syntax used to declare a StreamWriter variable is ____.

The ____ method writes a newline character after the data.

Write the code to declare a variable named inFile that can be used to read data from a sequential access file.Then write the statement to open a sequential access file named samples.txt for input.

Write a Structure statement that defines a structure named Vehicle.The structure contains three member variables named strMake,strModel,and intYear.Then write the Private statement that declares a Vehicle variable named truck.

What is the difference between a structure and a structure variable?

Which of the following determines whether an item is selected in the lstTrees control?

You can use the ____ to open a sequential access file for append.

Variables declared using a structure are often referred to as ____.

Assume that the variable amount contains the value 46.How many characters will be padded in the statement below? amount = amount.ToString.PadLeft(5)

When you pass a structure variable to a Sub or Function procedure,its member variables are not automatically passed.

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 samples.txt for output.New data should be written to the file after any existing data in the file.