Please help. I am stuck

1.

a. The subcommands in the following Unix command ls | more are executed _________.

	depends on system config
	in parallel
	concurrently
	sequentially

b.

Which of the following is not preemptive scheduling algorithm?

	Shortest Job First
	First Come First Serve
	Round Robin
	Priority scheduling

c. Which of the following statements is correct?

	After executing exec() method, a new program is loaded to the child process memory space
	After creating, the child process executes concurrently with the parent process
	The child process duplicates the parent process when it is created
	All of them

d.

________ is the time interval between the finished time of the process and the submission time of such a process.

	Response time
	Waiting time
	Turnaround time
	CPU Utilization

e.

Which of the following statements on thread creation is correct? (choose the best one)

	Thread creation involves mapping memory segment, copying open files, and variables.
	Thread creation uses less resources than process creation.
	Thread creation involves allocating registers, stack, and PC.
	Thread creation involves allocating registers, stack, and PC which consume less resources than creating process.