Ch 10: Hardware Interrupts and PIC 8259

Examines hardware interrupt architecture, masking interrupts via IMR (port 0x21), cascading master and slave PICs, sending non-specific EOI (0x20) commands, and servicing asynchronous peripheral requests.

189 Questions189 MCQs0 Short Questions0 Long Questions

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CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Timed practice exam simulation for CS401 - Computer Architecture and Assembly Language Programming.

Showing 131 – 140 of 189 Questions

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Q131

❓ MCQ📘 CS401📑 Lec 10🏷️ Stack Pointer (SP) Top-of-Stack TrackingEasy🔁⭐💡📄🎓VU🏛️VU

In 8088 stack operations, the Stack Pointer (SP) register contains the 16-bit offset pointing directly to the:

A.Top of the stack
B.Bottom of the stack
C.Middle of the stack
D.Any random stack position

Q132

❓ MCQ📘 CS401📑 Lec 10🏷️ Subroutines and Call/Return MechanicsEasy⭐💡📄🎓VU🏛️VU

Which pair of instructions is used to perform subroutines (procedure calling and returning) in 8088 assembly language?

💻 assembly Snippet

call my_subroutine
...
my_subroutine:
    ret

A.PUSH and POP
B.CALL and RET
C.ADC and SBB
D.MOV and CMP

Q133

❓ MCQ📘 CS401📑 Lec 10🏷️ CALL Instruction Execution and Register ModificationsEasy⭐💡📄🎓VU🏛️VU

The CALL instruction mechanism breaks the sequential thread of execution and branches to a subroutine without altering general-purpose registers, except modifying the:

💻 assembly Snippet

call my_func

A.SI (Source Index)
B.IP (Instruction Pointer)
C.DI (Destination Index)
D.BP (Base Pointer)

Q134

❓ MCQ📘 CS401📑 Lec 10🏷️ Stack Data Structure ConceptEasy⭐💡📄🎓VU🏛️VU

The stack is an essential CPU ________ that behaves in a Last-In, First-Out (LIFO) or First-In, Last-Out (FILO) manner.

A.Program
B.Data structure
C.Heap
D.None of the given

Q135

❓ MCQ📘 CS401📑 Lec 10🏷️ Callee Stack Cleanup with RET nMedium⭐💡📄🎓VU🏛️VU

If the ________ instruction form is not available, cleaning parameters off the stack by the callee subroutine becomes a complicated process.

💻 assembly Snippet

ret 4

A.CALL
B.SBB
C.RET n
D.None of the given

Q136

❓ MCQ📘 CS401📑 Lec 10🏷️ Stack Overflow and SP Memory WraparoundEasy⭐💡📄🎓VU🏛️VU

When pushing data onto a full stack, the Stack Pointer (SP) reaches 0 and wraps around to 0xFFFF, producing unexpected program behavior. This condition is called stack:

A.Overflow
B.Leakage
C.Error
D.Pointer

Q137

❓ MCQ📘 CS401📑 Lec 10🏷️ POP Instruction Destination OperandEasy⭐💡📄🎓VU🏛️VU

The POP operation retrieves a word from the top of the stack and copies it directly into its specified:

💻 assembly Snippet

pop ax

A.Register
B.Operand
C.RET n
D.Pointer

Q138

❓ MCQ📘 CS401📑 Lec 10🏷️ PUSH Instruction MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

Which instruction decrements SP (the Stack Pointer) by two and then transfers a 16-bit word from the source operand to the top of the stack?

💻 assembly Snippet

push ax

A.PUSH
B.POP
C.CALL
D.RET

Q139

❓ MCQ📘 CS401📑 Lec 10🏷️ Register Preservation using PUSH and POPEasy⭐💡📄🎓VU🏛️VU

A common assembly technique uses ________ and ________ operations to preserve register values on the stack before subroutine execution and restore them upon return.

💻 assembly Snippet

push ax
; subroutine body
pop ax

A.POP, ADC
B.CALL, RET
C.CALL, RET n
D.PUSH, POP

Q140

❓ MCQ📘 CS401📑 Lec 10🏷️ POP Instruction Stack Pointer IncrementEasy🔁⭐💡📄🎓VU🏛️VU

The POP instruction transfers the word at the current top of the stack (pointed to by SP) to the destination operand and then ________ SP by two to point to the new top of the stack.

💻 assembly Snippet

pop bx

A.Increments
B.Decrements
C.Multiplies
D.Clears

Ch 10: Hardware Interrupts and PIC 8259

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

Final Term Examination

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

Final Term Examination

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