Lpi LPI Certifications 102-400 Questions & Answers

• Question 71:

  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 72:

  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 73:

  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 74:

  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 75:

  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 76:

  Which of the following files, when existing, affect the behavior of the Bash shell? (Choose TWO correct answers.)

  A. ~/.bashconf

  B. ~/.bashrc

  C. ~/.bashdefaults

  D. ~/.bash_etc

  E. ~/.bash_profile

  Correct Answer: BE

• Question 77:

  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 78:

  What output will the command seq 10 produce?

  A. A continuous stream of numbers increasing in increments of 10 until stopped.

  B. The numbers 1 through 10 with one number per line.

  C. The numbers 0 through 9 with one number per line.

  D. The number 10 to standard output.

  Correct Answer: B

• Question 79:

  After issuing:

  function myfunction { echo $1 $2 ; }

  in Bash, which output does:

  myfunction A B C

  Produce?

  A. A B

  B. A B C

  C. A C

  D. B C

  E. C B A

  Correct Answer: A

• Question 80:

  Which of the following commands puts the output of the command date into the shell variable mydate?

  A. mydate="$(date)"

  B. mydate="exec date"

  C. mydate="$((date))"

  D. mydate="date"

  E. mydate="${date}"

  Correct Answer: A