LPI Level 1 Exam 101, Junior Level Linux Certification, Part 1 of 2 (101-400) Practice Test

Questions # 51:

Which of the following commands will reduce all consecutive spaces down to a single space?

tr '\s' ' ' < a.txt > b.txt

tr -c ' ' < a.txt > b.txt

tr -d ' ' < a.txt > b.txt

tr -r ' ' '\n' < a.txt > b.txt

tr -s ' ' < a.txt > b.txt

Questions # 52:

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter?

sed '/bob/Bob' letter > newletter

sed s/bob/Bob/ letter < newletter

sed's/bob/Bob' letter > newletter

sed 's/bob/Bob/g' letter > newletter

sed 's/bob, Bob/' letter > newletter

Questions # 53:

Which grep command will print only the lines that do not end with a / in the file foo?

grep'/$' foo

grep '/#' foo

grep -v '/$' foo

grep -v '/#' foo

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