Why file handling matters in Ruby - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file named 'example.txt' for reading.

Ruby

file = File.[1]('example.txt')

Drag options to blanks, or click blank then click option'

Awrite

Bread

Copen

Dclose

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read' instead of 'open' to start working with a file.

Trying to 'close' a file before opening it.

The File.open method is used to open a file in Ruby.

2fill in blank

medium

Complete the code to write the string 'Hello' to a file.

Ruby

File.open('greeting.txt', 'w') do |file|
  file.[1]('Hello')
end

Drag options to blanks, or click blank then click option'

Awrite

Bread

Cputs

Dclose

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read' which is for reading, not writing.

Using 'close' inside the block, which is handled automatically.

The write method writes a string to the file.

3fill in blank

hard

Fix the error in the code to read all lines from a file.

Ruby

lines = File.[1]('data.txt').readlines

Drag options to blanks, or click blank then click option'

Aputs

Bopen

Cclose

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call 'readlines' directly on 'write' or 'close'.

Using 'puts' which is for output, not file access.

You must open the file before calling readlines to get all lines.

4fill in blank

hard

Fill both blanks to create a hash with words as keys and their lengths as values, only for words longer than 3 characters.

Ruby

lengths = {word: word.[1] for word in words if word.[2] > 3}

Drag options to blanks, or click blank then click option'

Alength

Bsize

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'size' instead of 'length'.

Using '<' instead of '>' for filtering.

Use length to get the length of the word and > to filter words longer than 3 characters.

5fill in blank

hard

Fill all three blanks to create a hash with uppercase words as keys and their lengths as values, only for words longer than 4 characters.

Ruby

result = {word.[1]: word.[2] for word in words if word.[3] > 4}

Drag options to blanks, or click blank then click option'

Aupcase

Bsize

C>

Ddowncase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'downcase' instead of 'upcase'.

Using '<' instead of '>' for filtering.

Use upcase to convert words to uppercase, size to get length, and > to filter words longer than 4.