Can someone please help me with the questions? Thanks.

1. The relationship between which stack attributes is responsible for stack overflows?

		Stack base and stack pointer.
		Stack limit and value at the top of the stack.
		Stack limit and stack pointer.
		Stack base and stack limit.

2. What characterizes a memory segment? (Check two correct answers.)

		Base, size, and access permissions.
		Size and access permissions.
		Base, end, and access permissions.
		Base, memory type (RAM vs ROM), and access permissions.

3. Which two instructions are privileged?

		INT/TRAP
		IN
		ADD
		OUT
		DIV

4. The C function iopl() changes the I/O privilege level of the calling process. What two actions does this function allow the calling process to perform? (Hint: Read the appropriate manual page.)

		Have unrestricted access to all ports.
		Disable/enable interrupts.
		Bypass memory protection.
		Modify the interrupt vector.