Question 1

What was the first widely adopted commercial UNIX?

Accepted Answer

A)  AT&T System V 
B)  Berkeley Software Distribution 
C)  Linux 
D)  Sun Solaris

Question 2

What is the two-character sequence at the top of scripts, which tells the kernel what interpreter to use, called?

Accepted Answer

A)  Scripthash 
B)  Bangscript 
C)  Hashscript 
D)  Shebang

Question 3

If one or more CPUs in a system is extremely busy (less than 25% idle) but the run queue is relatively low, what might the system need to improve performance?

Accepted Answer

A)  Faster CPUs 
B)  More CPUs 
C)  More memory 
D)  Faster hard drives

Question 4

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

Accepted Answer

A)  drwxr-xr-x 
B)  -rw-r-r-- 
C)  -rwx-r-r-- 
D)  -rwxr-

Question 5

What must you do to get a complete report from the lsof command?

Accepted Answer

A)  Run it at boot time 
B)  Make it part of systemd 
C)  Run it as root 
D)  Run it as a regular user

Question 6

On a typical Linux system, where is the boot loader located?

Accepted Answer

A)  BIOS 
B)  MBR 
C)  VBR 
D)  Kernel

Question 7

Which utility can be used to merge sequentially corresponding lines of input streams into a single output stream?

Accepted Answer

A)  sort 
B)  cut 
C)  paste 
D)  diff 
E)  grep

Question 8

Which of these items runs in user space?

Accepted Answer

A)  System daemons 
B)  The IPC system 
C)  The process scheduler 
D)  Libraries and APIs 
E)  The C Standard Library

Question 9

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

Accepted Answer

A)  > 
B)  $ 
C)  # 
D)  enable#

Question 10

Which of these help documentation systems are installed on Arista switches?

Accepted Answer

A)  Google 
B)  Info 
C)  Man 
D)  Stack Overflow

Question 11

Which of the following is true when using the mv command to move a file to a new location on the same filesystem?

Accepted Answer

A)  It is not recommended because the filesystem could be corrupted 
B)  It is slow because the data has to be read and written 
C)  It is not recommended, and the cp command should be used instead It is not recommended, and the cp command should be used instead 
D)  It is very fast because only the directory entry needs updating

Question 12

The at system is used to

Accepted Answer

A)  set the system clock 
B)  run something at a later time 
C)  schedule something to run at intervals 
D)  timestamp the system logs

Question 13

Which loop type is the recommended way to iterate over a set of filenames?

Accepted Answer

A)  a case loop 
B)  a for loop 
C)  a while loop 
D)  an until loop

Question 14

What does the ctime of a file indicate?

Accepted Answer

A)  Creation time 
B)  Change time 
C)  Content time 
D)  Character time

Question 15

Which special device provides a place for redirecting unneeded data?

Accepted Answer

A)  /dev/null 
B)  /dev/zero 
C)  /dev/urandom 
D)  /dev/blank

Question 16

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

Accepted Answer

A)  {} 
B)  [] 
C)  () 
D)  ' ' 
E)  " "

Question 17

Why shouldn't you use standard package and dependency management on an Arista switch?

Accepted Answer

A)  Arista switches can't run package managers 
B)  Arista modifies the kernel to disallow it 
C)  Running an install could update dependencies required for the base EOS install 
D)  There is no reason not to use them on an Arista switch

Question 18

In bash scripting, which of the following is NOT valid way of evaluating an arithmetic expression?

Accepted Answer

A)  $(( )) 
B)  ${} 
C)  $[] 
D)  let

Question 19

Which commands can be used to copy a file to or from remote host?

Accepted Answer

A)  scp only 
B)  rsync only 
C)  scp and rsync 
D)  both cp and scp 
E)  cp, scp and rsync

Question 20

If the system is swapping, what can be done to alleviate the problem?

Accepted Answer

A)  Add faster CPUs 
B)  Add more CPUs 
C)  Add more memory 
D)  Add a larger hard drive

Exam 2: Arista Linux Essentials Exam