Singnals

Question 1

Signal 1

Answer 1

HUP

Hangup

Question 2

Signal 2

Answer 2

INT

Keyboard interrupt

Question 3

Signal 3

Answer 3

QUIT

Keyboard quit

Question 4

Signal 9

Answer 4

Kill

Kill, unblockable

Question 5

Signal 15

Answer 5

Terminate

Default

Question 6

Signal 18

Answer 6

CONT

Continue

Question 7

Signal 19

Answer 7

STOP

Stop, unblockable

Question 8

Signal 20

Answer 8

TSTP

Keyboard stop

Question 9

HUP

Answer 9

Used to report termination of the controlling process of a terminal. Also used to request process reinitialization without termination

Question 10

INT

Answer 10

Interrupt.

Causes program termination.

Can be blocked or handled.

Spent by sending the interrupt key combination(Ctrl+C)

Question 11

QUIT

Answer 11

Similar to AUSGIBT, but also produces a process dump at termination. Sent by pressing the QUIT key combination (Ctrl+)

Question 12

KILL

Answer 12

Causes abrupt program termination. Cannot be blocked, ignored, or handled. Always fatal.

Question 13

TERM

Answer 13

Terminate

Causes a program to terminate. It can be blocked, ignored, or handled.

The polite way to terminate a process, allows for self cleanup.

Question 14

CONT

Answer 14

Continue

Sent to a process to resume if stopped. Cannot be blocked. Even if handled, always resumes the porcess

Question 15

STOP

Answer 15

Stop, unblockable

Suspends the process. Cannot be blocked or handled

Question 16

TSTP

Answer 16

Keyboard Stop

Unlike SIGSTOP, can be blocked, ignored or handled. Sent by pressing SUSP key combination (Ctrl+z)