File attributes and operations in Operating Systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a file is readable.

Operating Systems

if os.access('example.txt', [1]):
    print('File is readable')

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

Aos.W_OK

Bos.R_OK

Cos.X_OK

Dos.F_OK

Attempts:

3 left

💡 Hint

Common Mistakes

Using write or execute flags instead of read flag.

The os.R_OK flag checks if the file is readable.

2fill in blank

medium

Complete the code to open a file for writing only if it exists.

Operating Systems

with open('data.txt', '[1]') as file:
    file.write('Hello')

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Aw

Bx

Cr+

Da

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' which creates the file if it doesn't exist.

The mode r+ opens the file for reading and writing but fails if the file does not exist.

3fill in blank

hard

Fix the error in the code to get the size of a file in bytes.

Operating Systems

size = os.path.[1]('file.txt')
print(size)

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Aget_size

Bfilesize

Csizeof

Dgetsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect function names like get_size or filesize.

The correct function to get file size is os.path.getsize.

4fill in blank

hard

Fill both blanks to create a dictionary of file names and their sizes for files larger than 1000 bytes.

Operating Systems

file_sizes = {f: os.path.[1](f) for f in files if os.path.[2](f) and os.path.getsize(f) > 1000}

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Agetsize

Bexists

Disfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using exists instead of isfile for file check.

Use getsize to get file size and isfile to ensure the path is a file.

5fill in blank

hard

Fill all three blanks to filter files by extension and size, then create a dictionary with uppercase file names and their sizes.

Operating Systems

filtered = {f.[1](): os.path.[2](f) for f in files if f.[3]('.txt') and os.path.getsize(f) > 500}

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Aupper

Bgetsize

Cendswith

Dlower

Attempts:

3 left

💡 Hint

Common Mistakes

Using lower() instead of upper(), or wrong method for extension check.

Use upper() to convert file names, getsize to get file size, and endswith to filter by '.txt' extension.