010-160 : Linux Essentials Certificate Exam : Part 04

010-160 : Linux Essentials Certificate Exam : Part 04

1. What is the purpose of the PATH environment variable?

   • It allows the execution of commands without the need to know the location of the executable.
   • It increases security by preventing commands from running in certain locations.
   • It specifies the location of a user’s home directory.
   • It indicates the location of the default shell to be used when a user logs in.
   • It contains the absolute path to the current directory.

2. Which of the following commands sets the variable USERNAME to the value bob?

   • set USERNAME bob

   • $USERNAME==bob

   • var USERNAME=bob

   • USERNAME<=bob

   • USERNAME=bob

3. FILL BLANK

   What command displays manual pages? (Specify ONLY the command without any path or parameters.)

   • man

4. Which command copies the contents of the directory /etc/, including all sub-directories, to /root/?

   • copy /etc /root

   • cp -r /etc/* /root

   • cp -v /etc/* /root

   • rcp /etc/* /root

   • cp -R /etc/*.* /root

5. Which of the following commands puts the lines of the file data.csv into alphabetical order?

   •  a..z data.csv

   • sort data.csv

   • abc data.csv

   • wc -s data.csv

   • grep --sort data.csv

6. Which of the following examples shows the general structure of a for loop in a shell script?

   • for *.txt as file => echo $file

   • for *.txt ( echo $i )

   • for file in *.txt
     do
     echo $i
     done

   • for ls *.txt exec {} \;

   • foreach @{file} {
     
     echo $i
     
     }

7. Which operator in a regular expression matches the preceding character either zero or one time?

   • ?

   • *

   • +

   • %

   • $

8. The file script.sh in the current directory contains the following content:

   #!/bin/bash
   echo $MYVAR

   The following commands are used to execute this script:

   MYVAR=value
   ./script.sh

   The result is an empty line instead of the content of the variable MYVAR. How should MYVAR be set in order to make script.sh display the content of MYVAR?

   • !MYVAR=value

   • env MYVAR=value

   • MYVAR=value

   • $MYVAR=value

   • export MYVAR=value

9. What is the return value of a shell script after successful execution?

   • 1

   • 0

   • -1

   • -255

   • 255

10. Which of the following commands creates the ZIP archive poems.zip containing all files in the current directory whose names end in .txt?

    • zip *.txt > poems.zip

    • zcat *.txt poems.zip

    • zip poems.zip *.txt

    • zip cfz poems.zip *.txt

    • cat *.txt | zip poems.zip

11. Which of the following statements are true regarding a typical shell script? (Choose two.)

    • It has the executable permission bit set.
    • It starts with the two character sequence #!.
    • It is located in /usr/local/scripts/.
    • It is located in /etc/bash/scripts/.
    • It is compiled into a binary file compatible with the current machine architecture.

12. Which of the following commands extracts the contents of the compressed archive file1.tar.gz?

    • tar -czf file1.tar.gz

    • ztar file1.tar.gz

    • tar -xzf file1.tar.gz

    • tar --extract file1.tar.gz

    • detar file1.tar.gz

13. Which of the following commands finds all lines in the file operating-systems.txt which contain the term linux, regardless of the case?

    • igrep linux operating-systems.txt

    • less -i linux operating-systems.txt

    • grep -i linux operating-systems.txt

    • cut linux operating-systems.txt

    • cut [Ll] [Ii] [Nn] [Uu] [Xx] operating-systems.txt

14. Which one of the following statements concerning Linux passwords is true?

    • All passwords can be decrypted using the system administrator’s master password.
    • Passwords may never start with a non-letter.
    • Users cannot change their password once it has been set.
    • Passwords are only stored in hashed form.
    • Passwords may be at most six characters long.

15. Which of the following programs are web servers? (Choose two.)

    • Apache HTTPD
    • Postfix
    • Curl
    • Dovecot
    • NGINX

16. Which of the following Linux Distributions is derived from Red Hat Enterprise Linux?

    • Raspbian
    • openSUSE
    • Debian
    • Ubuntu
    • CentOS

17. Which of the following statements is true about Free Software?

    • It is developed by volunteers only.
    • It may be modified by anyone using it.
    • It must always be available free of charge.
    • It only runs on Linux.
    • It is only distributed as a compiled binary.

18. How is a new Linux computing instance provisioned in an laaS cloud?

    • The standard Linux installer has to be run through a remote console.
    • After buying a Linux distribution, its vendor delivers it to a cloud instance.
    • The installation has to be prepared in a local virtual machine which is then copied to the cloud.
    • The cloud hosting organization provides a set of pre-prepared images of popular Linux distributions.
    • A provider-specific configuration file describing the desired installation is uploaded to the cloud provider.

19. What are the differences between a private web browser window and a regular web browser window? (Choose three.)

    • Private web browser windows do not allow printing or storing websites.
    • Private web browser windows do not store cookies persistently.
    • Private web browser windows do not support logins into websites.
    • Private web browser windows do not keep records in the browser history.
    • Private web browser windows do not send regular stored cookies.

20. What is the preferred source for the installation of new applications in a Linux based operating system?

    • The vendor’s version management system
    • A CD-ROM disk
    • The distribution’s package repository
    • The vendor’s website
    • A retail store