Unit 1 Jan 2017 Question 4 preparation

Unit 1 Jan 2017 Question 4 preparation

11th Grade

10 Qs

quiz-placeholder

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Unit 1 Jan 2017 Question 4 preparation

Unit 1 Jan 2017 Question 4 preparation

Assessment

Quiz

Computers

11th Grade

Medium

Created by

Sarah Williams

Used 1+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

45 sec • 3 pts

What does if(userid.text!= "") do?

Check to see if "" is the text box

Check to see if the text box is empty

Check to see if the text box exists

Check to see if there is text in the text box

Answer explanation

The condition if(userid.text != "") checks if the text box is not empty. If it contains any text, it evaluates to true, confirming that there is text in the text box.

2.

MULTIPLE CHOICE QUESTION

45 sec • 3 pts

What does if(userid.text!= "" && ridename.text!="") do?

Check to see if "" is in the userid and ridename text box

Check to see if the userid and ridename text boxes are empty

Check to see if the userid and ridename text boxes exists

Check to see if there is text in the userid and ridename text boxes

Answer explanation

The condition checks if both userid and ridename text boxes are not empty. If they contain text, the condition evaluates to true, indicating that valid input is present.

3.

MULTIPLE CHOICE QUESTION

45 sec • 3 pts

What does File.ReadAllLines(@"./log.txt") do?

Reads the first line of text from the log.txt file

Reads all the lines from the log.txt file

Writes @ to the log.txt file

Clears the log.txt file

Answer explanation

File.ReadAllLines("./log.txt") reads all lines from the specified log.txt file and returns them as an array of strings. This makes the correct answer 'Reads all the lines from the log.txt file'.

4.

MULTIPLE CHOICE QUESTION

45 sec • 3 pts

What does File.ReadAllLines(@"./log.txt").Length return?

The number of characters in the text file

The size of the text file

The number of lines in the text file

How many @ characters appear in the text file

Answer explanation

File.ReadAllLines reads all lines from a file and returns them as an array. The Length property of this array indicates the number of lines in the text file, making 'The number of lines in the text file' the correct answer.

5.

MULTIPLE CHOICE QUESTION

45 sec • 3 pts

What does adding .ToString do to File.ReadAllLines(@"./log.txt").Length so it becomes File.ReadAllLines(@"./log.txt").Length.ToString()

Changes the integer length to a string

Changes the string length to an integer

Changes the array to a string

Changes the file to a string

Answer explanation

Adding .ToString converts the integer result of File.ReadAllLines(@"./log.txt").Length into a string representation. This is important for scenarios where a string format is required, making the correct choice: 'Changes the integer length to a string'.

6.

MULTIPLE CHOICE QUESTION

45 sec • 3 pts

What does the instruction File.AppendAllText( filename, array) do?

Overwrites the text in the text file with the text in the array

Deletes the textfile

Adds text from the array to the existing text in the text file

Creates a new array

Answer explanation

File.AppendAllText appends the text from the array to the existing content of the specified text file, rather than overwriting it. This means any previous text remains intact while new text is added.

7.

MULTIPLE CHOICE QUESTION

45 sec • 3 pts

What does the Parse command do, eg int.Parse()?

Changes the given text to a different data type

Adds the text to an array

Adds the text to a file

Creates a new text file

Answer explanation

The Parse command, such as int.Parse(), converts a string representation of a number into an integer data type. This is why the correct answer is 'Changes the given text to a different data type'.

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