About Ctrl + C, Ctrl + Z in linux

Ctrl + C: Send the SIGINT signal. by default, the process ends, but the process itself can redefine the behavior of receiving the signal. Ctrl + Z: Send the SIGSTOP signal, the process is only stopped, then send the SIGCONT signal, and the process continues to run. Ctrl-d is not a sending signal, but a special binary...

Ctrl + C: Send the SIGINT signal. by default, the process ends, but the process itself can redefine the behavior of receiving the signal.
Ctrl + Z: Send the SIGSTOP signal, the process is only stopped, then send the SIGCONT signal, and the process continues to run.
Ctrl-d is not a sending signal, but a special binary value, indicating EOF
 
Some signals cannot be blocked, such as interruptions. There should also be signals to kill processes. Otherwise, how should the kernel become the boss in the operating system. In fact, SIGKILL and SIGSTOP signals cannot be blocked or blocked, and their default actions will always be executed.