1. Which of the following is a valid IP Address?

A. 1.1

B. 1.1.1.1.1

C. 1.0.1.0.1.0.1

D. 2401:700o:a102:d200:21d:43ff:fee0:1b9a

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2. Which of the following is the best software to generate a random string?

A. OpenSMTPD

B. OpenLDAP

C. OpenSSL

D. OpenSSH

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3. Which of the following is not a common Linux command?

A. yes

B. no

C. mesg

D. sleep

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4. A certain time T expressed as seconds since 1970-01-01 00:00:00 UTC, concatenated with a line feed, produces a hash string of "08fb227e05dde85e1466108e87ae4f91" in message digest 5 algorithm computation. Now, express time T in yyyymmdd format (eg. 19700101)

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5. What is the best way to comment out the echo statement in the following code block for bash?

if [ x == x ]
then
  echo I am here\!
fi