Q3. CORRECT TEXTWhat word is missing from the following SQL statement?

count(*) from tablename;

(Please specify the missing word using lower-case letters only.)

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Q4. Which of the following commands shows the current color depth of the X Server?

A. xcd

B. xcdepth

C. xwininfo

D. xcolordepth

E. cat /etc/X11

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Q5. Which of the following crontab entries will execute myscript at 30 minutes past every hour on Sundays?

A. 0 * * * 30 myscript

B. 30 * * * 6 myscript

C. 30 0 * * 0 myscript

D. 30 0-23 * * 0 myscript

E. 0 0-23 * * 30 myscript

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Q6. Which of the following commands can remove a user from a group?

A. grouprm

B. groupmod

C. passwd

D. usergroups

E. usermod

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Q7. What is the difference between the commands test -e path and test -f path?

A. They are equivalent options with the same behaviour.

B. The -f option tests for a regular file. The -e option tests for an empty file.

C. Both options check the existence of the path. The -f option also confirms that it is a regular file.

D. The -f option tests for a regular file. The -e option tests for an executable file.

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Q8. Which of the following commands should be added to /etc/bash_profile in order to change the language of messages for an internationalized program to Portuguese (pt)?

A. export LANGUAGE="pt"

B. export MESSAGE="pt"

C. export UI_MESSAGES="pt"

D. export LC_MESSAGES="pt"

E. export ALL_MESSAGES="pt"

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Q9. CORRECT TEXTWhat command displays all aliases defined in the current shell? (Specify the command without any path information)

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Q10. CORRECT TEXTWhich command is used to sync the hardware clock to the system clock? (Specify ONLY the command without any path or parameters.)

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Q11. Which of the following commands lists all defined variables and functions within Bash?

A. env

B. set

C. env -a

D. echo $ENV

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Q12. Which of the following is observed and corrected by a NTP client?

A. The skew in time between the system clock and the hardware clock.

B. The skew in time between the system clock and the reference clock.

C. Changes in the time zone of the current computer's location.

D. Adjustments needed to support Daylight Saving Time.

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