CompTIA CompTIA Certifications LX0-104 Questions & Answers

• Question 161:

  Which of the following commands prints the exit value of the most recently executed program in Bash?

  A. echo $?

  B. echo $#

  C. echo $exit

  D. echo $status

  E. echo $and

  Correct Answer: A

• Question 162:

  Which Bash option prevents a user from accidentally overwriting a file with a ">"?

  A. set –o safe

  B. set –o noglob

  C. set –o noclobber

  D. set –o append

  E. set –o nooverwrite

  Correct Answer: C

• Question 163:

  What output will the following command produce?

  seq 1 5 20

  A. 1

  B. 1

  C. 1

  D. 2

  E. 5

  Correct Answer: A

• Question 164:

  Which of the following words is used to restrict the records that are returned from a SELECT SQL query based on a supplied criteria for the values in the records?

  A. CASE

  B. FROM

  C. WHERE

  D. IF

  Correct Answer: C

• Question 165:

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

  A. env

  B. set

  C. env -a

  D. echo $ENV

  Correct Answer: B

• Question 166:

  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.

  Correct Answer: C

• Question 167:

  How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?

  A. unset -v FOOBAR;./myscript

  B. set -a FOOBAR="";./myscript

  C. env -u FOOBAR./myscript

  D. env -i FOOBAR./myscript

  Correct Answer: C

• Question 168:

  When the command echo $$ outputs 12942, what is the meaning of 12942?

  A. It is the process ID of the echo command.

  B. It is the process ID of the current shell.

  C. It is the process ID of the last command executed.

  D. It is the process ID of the last command which has been placed in the background.

  Correct Answer: B

• Question 169:

  What word is missing from the following SQL statement?

  insert into tablename ________(909, 'text');

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

  A. VALUES -or- values

  Correct Answer: A

• Question 170:

  Which command makes the shell variable named VARIABLE visible to subshells?

  A. export $VARIABLE

  B. export VARIABLE

  C. set $VARIABLE

  D. set VARIABLE

  E. env VARIABLE

  Correct Answer: B