Question 21 (1 point)

By using multiple bits, the 'mode bit' concept can be extended to more than two stages.

Question 21 options:

	True
	False

Question 22 (1 point)

The ________ holds the address of the next instruction to be fetched.

Question 22 options:

	Program Counter
	Instruction Counter
	Accumulator
	Instruction Register

Question 23 (2 points)

Question 23 options:

When solving a bounded buffer problem, (Blank)

must not overtake (Blank)

, and overwrite full slots.

Question 24 (1 point)

Allowing the value of a semaphore variable to be negative violates the definition of a semaphore.

Question 24 options:

	True
	False

Question 25 (1 point)

The hardware/user gap is bridged by the OS or by other system software. The task of calling a shared library function would, most likely, not require any OS support.

Question 25 options:

	True
	False