MCQs on Process Management | Shell Scripting
Process management is a crucial concept in shell scripting and Linux systems. Understanding how processes, jobs, and commands like kill, ps, and jobs work is vital for system administration.
Chapter: Process Management – MCQs
1. Understanding Processes and Jobs
- What is a process in Linux?
- a) A running instance of a program
- b) A file stored in memory
- c) A command that is executed
- d) A list of active users
- Which command shows all running processes in Linux?
- a)
ls - b)
ps - c)
top - d)
jobs
- a)
- In Unix, how is a process identified?
- a) By its ID
- b) By its name
- c) By its size
- d) By the command it executes
- What is a background process in Linux?
- a) A process that is running in the terminal
- b) A process that runs when the user is logged out
- c) A process that runs in the background without user interaction
- d) A process that occupies the screen
- What does the
pidrepresent in a process listing?- a) The size of the process
- b) The time the process started
- c) The process identification number
- d) The name of the process
- Which command can you use to see processes running in the background?
- a)
ps - b)
fg - c)
jobs - d)
kill
- a)
- Which command is used to bring a background job to the foreground?
- a)
fg - b)
bg - c)
jobs - d)
ps
- a)
- What is a job in shell scripting?
- a) A background task running in the terminal
- b) A task that has finished execution
- c) A command in a script file
- d) A file in the file system
- How can you run a command in the background in Linux?
- a) By using the
&symbol - b) By using the
bgcommand - c) By using the
jobscommand - d) By using the
nohupcommand
- a) By using the
- What does the command
jobsdo in Linux?- a) Lists background jobs
- b) Lists all active processes
- c) Lists current directory jobs
- d) Executes a script
2. Background and Foreground Jobs
- What does the
fgcommand do in Linux?- a) Stops a running process
- b) Brings a background job to the foreground
- c) Sends a process to the background
- d) Lists all foreground jobs
- Which of the following is used to send a job to the background in Linux?
- a)
bg - b)
fg - c)
jobs - d)
ps
- a)
- How can you stop a running job in the foreground?
- a)
Ctrl + Z - b)
Ctrl + C - c)
Ctrl + D - d)
Ctrl + X
- a)
- Which signal is sent when you use
Ctrl + Cin the terminal?- a)
SIGTERM - b)
SIGKILL - c)
SIGSTOP - d)
SIGINT
- a)
- How can you resume a stopped job in the background?
- a)
fg - b)
bg - c)
jobs - d)
ps
- a)
- What is the command to list the currently running jobs in the shell?
- a)
jobs - b)
ps - c)
top - d)
kill
- a)
- What does the
&symbol do when appended to a command?- a) Runs the command in the background
- b) Runs the command as superuser
- c) Runs the command in debug mode
- d) Runs the command in the foreground
- Which command is used to run a job without being terminated when the user logs out?
- a)
bg - b)
nohup - c)
fg - d)
exit
- a)
- What will happen if you press
Ctrl + Zwhile a command is running?- a) The command will terminate
- b) The command will be paused and sent to the background
- c) The command will continue running in the foreground
- d) The command will be resumed
- How do you send a process to the background after it has been stopped?
- a) Use
bg - b) Use
fg - c) Use
jobs - d) Use
kill
- a) Use
3. Process Control: kill, ps, jobs, wait
- Which command is used to kill a process in Linux?
- a)
ps - b)
kill - c)
wait - d)
jobs
- a)
- What signal does the
killcommand send by default to terminate a process?- a)
SIGTERM - b)
SIGKILL - c)
SIGSTOP - d)
SIGINT
- a)
- How can you kill a process using its
pid?- a)
kill <pid> - b)
killall <pid> - c)
ps <pid> - d)
stop <pid>
- a)
- What does the
pscommand do in relation to processes?- a) Lists active background jobs
- b) Lists the status of the running processes
- c) Executes a process
- d) Kills a process
- How do you list all processes, including those owned by other users?
- a)
ps - b)
ps -u - c)
ps -A - d)
ps -a
- a)
- What is the function of the
waitcommand in Linux?- a) Waits for a job to finish
- b) Stops a running process
- c) Starts a process in the background
- d) Pauses the terminal
- Which signal is used to immediately terminate a process with
kill?- a)
SIGKILL - b)
SIGTERM - c)
SIGINT - d)
SIGSTOP
- a)
- Which command would you use to list processes in real-time?
- a)
ps - b)
top - c)
jobs - d)
kill
- a)
- What is the result of using the
kill -9 <pid>command?- a) It terminates the process without cleanup
- b) It pauses the process
- c) It restarts the process
- d) It sends a warning to the process
- How can you view detailed information about all processes, including their parent-child relationships?
- a)
ps -e - b)
ps -f - c)
ps -a - d)
ps -l
- a)
Answers
| Qno | Answer |
|---|---|
| 1 | a) A running instance of a program |
| 2 | b) ps |
| 3 | a) By its ID |
| 4 | c) A process that runs in the background without user interaction |
| 5 | c) The process identification number |
| 6 | c) jobs |
| 7 | a) fg |
| 8 | a) A background task running in the terminal |
| 9 | a) By using the & symbol |
| 10 | a) Lists background jobs |
| 11 | b) Brings a background job to the foreground |
| 12 | a) bg |
| 13 | a) Ctrl + Z |
| 14 | d) SIGINT |
| 15 | b) bg |
| 16 | a) jobs |
| 17 | a) Runs the command in the background |
| 18 | b) nohup |
| 19 | b) The command will be paused and sent to the background |
| 20 | a) Use bg |
| 21 | b) kill |
| 22 | a) SIGTERM |
| 23 | a) kill <pid> |
| 24 | b) Lists the status of the running processes |
| 25 | c) ps -A |
| 26 | a) Waits for a job to finish |
| 27 | a) SIGKILL |
| 28 | b) top |
| 29 | a) It terminates the process without cleanup |
| 30 | b) ps -f |