Arista Arista Certifications ACE-P-ALE1.04 Questions & Answers

• Question 81:

  The sed utility's name is short for what?

  A. stdout editor

  B. stream editor

  C. simple editor

  D. string editor

  Correct Answer: B

  Reference https://www.computerhope.com/unix/used.htm

• Question 82:

  The three special file modes are

  A. owner/group/world

  B. read/write/execute

  C. user/group/others

  D. setuid/setgid and sticky

  Correct Answer: D

  Reference: https://en.wikipedia.org/wiki/Modes_(Unix)

• Question 83:

  In file globbing, which symbol matches any single character?

  A. *

  B. ?

  C. []

  D. .

  Correct Answer: A

  Reference: https://unix.stackexchange.com/questions/123296/what-is-the-symbol-called

• Question 84:

  Where will the whereis command look to locate files?

  A. The system binary directories

  B. Your $PATH

  C. Root's $PATH

  D. Recursively starting at/

  Correct Answer: B

  https://en.wikibooks.org/wiki/Guide_to_Unix/Commands/Finding_Files#whereis

• Question 85:

  When scripting in bash, it is recommended to always use which symbols around your variables to reference them?

  A. {}

  B. []

  C. ()

  D. ` '

  E. " "

  Correct Answer: E

• Question 86:

  What will the permissions of a regular file with octal mode 755 look like in the output of the 1s command?

  A. drwxr-xr-x

  B.璻w-r--r-

  C.璻wx-r--r-

  D.璻wxr-

  Correct Answer: B

• Question 87:

  What tool is awk based on?

  A. ed

  B. grep

  C. sed

  D. emacs

  Correct Answer: A

• Question 88:

  In a bash script, what does the $0 builtin variable contain?

  A. The entire command line

  B. The name of the script

  C. The last command line argument

  D. The number of command line arguments

  Correct Answer: B

  https://stackoverflow.com/questions/5163144/what-are-the-special-dollar-sign-shell- variables

• Question 89:

  What is the default standard user prompt for Bourne-based shells?

  A. >

  B. $

  C. #

  D. enable#

  Correct Answer: B

• Question 90:

  In regular expressions, to what does greedy vs. lazy refer?

  A. How many lines in a file the pattern will match

  B. How many times the pattern will match on a line

  C. How strict the pattern is required to be

  D. Whether the pattern quantifiers will stop at whitespace

  Correct Answer: D

  Reference: https://stackoverflow.com/questions/2301285/what-do-lazy-and-greedy-mean- in-the-context-of-regular-expressions