Linux Text Processing & Editors

Question 1

Which vim command saves the current file and exits the editor?

Accepted Answer

:wq

Answer

:q!

Answer

:x!

Answer

:save

Question 2

What does the `grep -i` flag do?

Accepted Answer

Performs a case-insensitive search

Answer

Inverts the match to show non-matching lines

Answer

Displays line numbers alongside matches

Answer

Searches recursively through directories

Question 3

Which sed command replaces ALL occurrences of 'foo' with 'bar' on each line?

Accepted Answer

sed 's/foo/bar/g' file

Answer

sed 's/foo/bar/' file

Answer

sed 'r/foo/bar/' file

Answer

sed '/foo/bar/g' file

Question 4

What does `awk '{print $2}' file` output?

Accepted Answer

The second field (column) of each line

Answer

The entire second line of the file

Answer

Lines that contain exactly 2 fields

Answer

The file content starting from line 2

Question 5

Which command displays the last 10 lines of a file by default?

Accepted Answer

tail

Answer

head

Answer

more

Answer

less

Question 6

What does `sort -n` do differently from `sort` without flags?

Accepted Answer

Sorts by numeric value instead of lexicographically

Answer

Sorts output in reverse order

Answer

Sorts and removes duplicate lines

Answer

Sorts while ignoring case

Question 7

Which command counts lines, words, and bytes in a file?

Accepted Answer

wc

Answer

count

Answer

len

Answer

size