QUESTION 4

Regular Expressions are used by some commands for pattern matching.

True

False

2 points

QUESTION 5

The program 'tr' is a UNIX Filter.

True

False

2 points

QUESTION 6

The command

grep '^$' file | wc -l

count all the lines in a file which are empty.

True

False

2 points

QUESTION 7

The command

sed 's/a/b/g'

produces the same output as running the command

sed 's;a;b;g'

True

False

2 points

QUESTION 8

Assuming file has 200 lines, the command

sed -n '10,15p' file

prints only lines 10 though 15 of that file

True

False