Linux Text Processing & Editors 3

Question 1

What does `grep -v "error" logfile` display?

Accepted Answer

Lines that do NOT contain the word 'error'

Answer

Lines that contain the word 'error'

Answer

The count of lines containing 'error'

Answer

Verbose output showing every file scanned

Question 2

In vim's normal mode, which key switches to insert mode placing the cursor before the current character?

Accepted Answer

i

Answer

a

Answer

o

Answer

s

Question 3

What does `awk 'NR==3 {print}' file` do?

Accepted Answer

Prints only the third line of the file

Answer

Prints all lines except line 3

Answer

Prints the third field of every line

Answer

Prints lines containing exactly 3 records

Question 4

What does `sed -i 's/old/new/g' file` do?

Accepted Answer

Modifies the file in-place, replacing all occurrences

Answer

Prints substitutions to stdout without changing the file

Answer

Creates a backup and writes changes to a new file

Answer

Inserts 'new' after every line containing 'old'

Question 5

What does `grep -c "pattern" file` return?

Accepted Answer

The count of lines that match the pattern

Answer

The column number where each match begins

Answer

A list of individual characters matching the pattern

Answer

The file content with matching text colored

Question 6

Which awk built-in variable defines the input field separator?

Accepted Answer

FS

Answer

RS

Answer

NF

Answer

OFS

Question 7

What does the `join` command do in Linux?

Accepted Answer

Combines lines from two sorted files that share a common field

Answer

Concatenates multiple files into one

Answer

Merges files side by side with tab separation

Answer

Appends a file to another file