Order the sequence of events, in scheduling process P1 after process P0

Select the sequence of events that are NOT possible, assuming a non-interruptible kernel code

(Note: non-interruptible kernel code means, if the kernel code is executing, then interrupts will be disabled).

Note: A possible sequence may have some missing steps in between. An impossible sequence will will have n and n+1th steps such that n+1th step can not follow n'th step.

Select all the correct statements about the process init on Linuxes/Unixes.

Write the possible contents of the file /tmp/xyz after this program.

In the answer if you want to mention any non-text character, then write \0  For example abc\0\0 means abc followed by any two non-text characters

int main(int argc, char *argv[]) {

What will this program do?

int main() {

fork();

execl("/bin/ls", "/bin/ls", NULL);

printf("hello");

}

Select all the correct statements about bootloader.

Every wrong selection will deduct marks proportional to 1/n where n is total wrong choices in the question.

You will get minimum a zero.

When you turn your computer ON, on BIOS based systems, you are often shown an option like "Press F9 for boot options". What does this mean?

Select all statements that correctly explain the use/purpose of system calls.

Predict the output of the program given here.

Assume that all the path names for the programs are correct. For example "/usr/bin/echo" will actually run echo command.

Assume that there is no mixing of printf output on screen if two of them run concurrently.

In the answer replace a new line by a single space.

For example::

good

output

should be written as good output

--

main() {