MCQS on SYSTEM ADMINISTRATOR

1.    Which language is used to write Ansible playbooks?

a) JSON

b) YAML

c) XML

d) Python

 

Answer: b) YAML

 

2.    What is the alternative command of echo?

a) print

b) printf

c) display

d) write

Answer: b) printf

 

3.    Command to close a terminal session:

a) end

b) exit

c) stop

d) halt

 

Answer: b) exit

 

4.    Which command lists currently running processes in Linux?

a) ls

b) jobs

c) ps

d) proc

 

Answer: c) ps

 

5.    The cd command operates in which mode?

a) Kernel mode

b) User mode

c) Supervisor mode

d) Process mode

Answer: b) User mode

 

6.    Which command shows date in dd/mm/yyyy format?

a) date "+%m/%d/%Y"

b) date "+%Y/%m/%d"

c) date "+%d/%m/%Y"

d) date "+%D"

Answer: c) date "+%d/%m/%Y"

 

7.    Which command is used to download files from the internet in Linux?

a)   curl

b)   wget

c)    ftp

d)   fetch

Answer: b) wget

 

8.    Which command displays system uptime?

a) uptime

b) top

c) who

d) sysstat

Answer: a) uptime

 

9.    Which command shows disk usage in human-readable format?

a) df -h

b) du -k

c) ls -lh

d) disk -u

Answer: a) df -h

 

10. Which Linux command shows last 10 lines of a file?

a) head

b) tail

c) less

d) grep

Answer: b) tail

 

 

 

 

Ansible & Automation

 

11. What is Ansible mainly used for?

a) Containerization

b) Configuration management and automation

c) Network monitoring

d) Log management

Answer: b) Configuration management and automation

 

12. Which command runs an Ansible playbook?

a) ansible

b) ansible-run

c) ansible-playbook

d) run-playbook

Answer: c) ansible-playbook

 

13. YAML files in Ansible must start with:

a) {}

b) []

c) ---

d) ###

Answer: c)

 

14. Ansible connects to remote machines via:*

a) FTP

b) SSH

c) Telnet

d) HTTP

Answer: b) SSH

 

15. Ansible modules are written in:

a) Java

b) Python

c) Bash

d) C++

Answer: b) Python

 

 

 

Databases & SQL

 

16. Full outer join returns:

a) Only matching rows

b) Non-matching rows only

c) All rows from both tables with NULL for missing matches

d) Only left table rows

Answer: c) All rows from both tables with NULL for missing matches

 

17. Join that returns non-matching rows is:

a) Inner join

b) Self join

c) Anti join

d) Cross join

Answer: c) Anti join

 

18. A materialized view is:

a) Temporary view created in memory

b) Virtual table updated in real time

c) A physically stored query result

d) Just a synonym of a table

Answer: c) A physically stored query result

 

19. Which SQL command removes all rows but keeps structure?*

a) DELETE

b) DROP

c) TRUNCATE

d) REMOVE

Answer: c) TRUNCATE

 

20. Which constraint ensures unique values in a column?

a) FOREIGN KEY

b) PRIMARY KEY

c) UNIQUE

d) CHECK

Answer: c) UNIQUE

 

 

 

21. What does YAML stand for?

a) Yet Another Markup Language

b) YAML Ain’t Markup Language

c) Your Actual Markup Language

d) Yield And Mark Language

Answer: b) YAML Ain’t Markup Language

 

22. What is a rainbow attack?

a) SQL injection

b) Brute force using hash chains

c) Malware injection

d) DoS attack

Answer: b) Brute force using hash chains

 

23. What is the function of ssh-keygen?

a) Reset root password

b) Generate SSH key pairs

c) Encrypt files

d) Create digital certificates

Answer: b) Generate SSH key pairs

 

24. Which SSH command copies files to remote hosts?

a) ssh-copy

b) scp

c) cp-ssh

d) ssh-put

Answer: b) scp

 

25. Which command displays routing table in Linux?

a) route -n

b) ifconfig

c) traceroute

d) netstat -r

Answer: a) route -n

 

26. Patch management involves:

a) Installing software patches

b) Monitoring logs

c) Adding new users

d) Firewall configuration

Answer: a) Installing software patches

 

27. Which protocol does HTTPS use for encryption?

a) TLS/SSL

b) SSH

c) IPsec

d) AES

Answer: a) TLS/SSL

 

28. Which tool is used for packet capturing?

a) ping

b) traceroute

c) tcpdump

d) whois

Answer: c) tcpdump

 

29. Malware encryption is mainly used for

a) Securing user files

b) Evading detection

c) Increasing execution speed

d) Network communication

Answer: b) Evading detection

 

29. Which Linux command shows listening network ports?

a) netstat -tuln

b) route -n

c) ifconfig

d) ip link show

Answer: a) netstat -tuln

 

30. last -F command shows:

a) Failed login attempts

b) Full login & logout times

c) Current users

d) Last run processes

Answer: b) Full login & logout times

 

 

31. Which file stores Linux user account info?

a) /etc/group

b) /etc/passwd

c) /etc/shadow

d) /etc/login

Answer: b) /etc/passwd

 

32. Which file stores encrypted user passwords?

a) /etc/login

b) /etc/shadow

c) /etc/group

d) /etc/passwd

Answer: b) /etc/shadow

 

33. Which Linux command is used to change permissions?

a) chmod

b) chown

c) ls -l

d) umask

Answer: a) chmod

 

34. Which Linux command is used to check memory usage?

a) free -h

b) df -h

c) ps aux

d) top

Answer: a) free -h

 

35. Which Linux command shows system logs?

a) dmesg

b) syslog

c) journalctl

d) logview

Answer: c) journalctl

 

36. Which runlevel represents multi-user mode without GUI in Linux?

a) 3

b) 5

c) 0

d) 1

Answer: a) 3

 

37. Which Linux command is used to schedule tasks once?

a) cron

b) at

c) systemctl

d) job

Answer: b) at

 

38. Which Linux command continuously monitors processes?

a) ps

b) jobs

c) top

d) kill

Answer: c) top

 

39. Which Linux command kills a process by PID?

a) kill -9

b) exit -f

c) stop -p

d) terminate -pid

Answer: a) kill -9

 

40. Which one is NOT a Linux OS?

a) Ubuntu

b) Fedora

c) Debian

d) Solaris

Answer: d) Solaris

 

41. Which Linux distribution is known for servers?

a) Ubuntu Server

b) CentOS/RHEL

c) Fedora Workstation

d) Kali Linux

Answer: b) CentOS/RHEL

 

 

42. Which Linux distribution is popular for penetration testing?

a) Ubuntu

b) Debian

c) Kali Linux

d) Fedora

Answer: c) Kali Linux

 

43. Which Linux distribution is community-driven and based on Debian?

a)   Ubuntu

b)   Arch

c)    Fedora

d)   OpenSUSE

Answer: a) Ubuntu

 

44. Which package manager does Ubuntu use?

a) yum

b) apt

c) dnf

d) pacman

Answer: b) apt

 

45. Which package manager does CentOS/RHEL use?

a)   apt

b)   pacman

c)    yum/dnf

d)   zypper

Answer: c) yum/dnf

 

46. Which file system is default in most modern Linux distros?*

a)   FAT32

b)   NTFS

c)    ext4

d)   HFS+

Answer: c) ext4

 

47. Which Linux command extracts .tar.gz file?

a)   unzip file.tar.gz

b)   tar -xvzf file.tar.gz

c)    gunzip file.tar.gz

d)   untar file.tar.gz

Answer: b) tar -xvzf file.tar.gz

 

48. Which Linux command finds files by name?

a)   locate filename

b)   where filename

c)    find / -name filename

d)   search filename

Answer: c) find / -name filename

 

49. Which Linux command compresses a file using gzip?

a)   compress

b)   zip

c)    gzip file

d)   gz file

Answer: c) gzip file

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