Ch 14: Preemptive Multitasking & Context Switching

Detailed implementation of a complete preemptive multitasking kernel driven by PIT timer interrupts (INT 08h), managing ready/blocked process queues, and stack-pointer manipulation during context switching.

90 Questions90 MCQs0 Short Questions0 Long Questions

🎯 Exam Practice Papers

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

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

Showing 61 – 70 of 90 Questions

Page 7 of 9

Q61

📝 Short Q📘 CS401📑 Lec 14🏷️ CALL and RET Stack MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

Explain how the CALL and RET instructions interact with the Instruction Pointer (IP) and the system stack to control program execution flow.

💻 assembly Snippet

call my_subroutine
; Next instruction executed after RET

Q62

📝 Short Q📘 CS401📑 Lec 14🏷️ Register-Level Mechanics of PUSH and POP InstructionsEasy🔁⭐💡📄🎓VU🏛️VU

Describe the precise step-by-step register and memory operations executed by 'PUSH AX' and 'POP AX' in 8088 assembly language.

💻 assembly Snippet

push ax
pop ax

Q63

📝 Short Q📘 CS401📑 Lec 14🏷️ Subroutine Context Preservation using PUSH and POPMedium🔁⭐💡📄🎓VU🏛️VU

Why is saving and restoring general-purpose registers using PUSH and POP inside subroutines considered a critical programming standard for context preservation?

💻 assembly Snippet

push ax
push bx
; body
pop bx
pop ax
ret

Q64

📝 Short Q📘 CS401📑 Lec 14🏷️ PUSH and POP Instruction MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

Explain the mechanics of the PUSH and POP instructions in 8088 assembly language, specifying Stack Pointer (SP) modifications and operand roles.

💻 assembly Snippet

push ax
pop bx

Q65

📝 Short Q📘 CS401📑 Lec 14🏷️ Subroutine Context Preservation using PUSH and POPEasy🔁⭐💡📄🎓VU🏛️VU

Why is saving and restoring modified registers using PUSH and POP inside subroutines (like Swap or Bubble Sort) critical for modular programming?

💻 assembly Snippet

bubble_sort:
  push ax
  push cx
  push si
  ; sorting logic
  pop si
  pop cx
  pop ax
  ret

Q66

📝 Short Q📘 CS401📑 Lec 14🏷️ Stack Overflow and Importance of Parameter Stack CleanupEasy🔁⭐💡📄🎓VU🏛️VU

What happens if parameters pushed onto a decrementing stack are repeatedly left uncleared across subroutine calls, and what term describes this memory corruption failure?

Q67

❓ MCQ📘 CS401📑 Lec 14🏷️ Static vs Dynamic Thread CreationEasy⭐💡📄🎓VU🏛️VU

In multi-threaded software architectures and operating systems, thread allocation and creation can be either static or:

A.Static
B.Dynamic
C.Easy
D.Difficult

Q68

❓ MCQ📘 CS401📑 Lec 14🏷️ Multi-Threading Stack Allocation and Local VariablesEasy⭐💡📄🎓VU🏛️VU

In concurrent thread execution, each individual thread maintains its own call stack containing private function calls, parameters, and ________ variables.

A.Global
B.Local
C.Legal
D.Illegal

Q69

❓ MCQ📘 CS401📑 Lec 14🏷️ Multi-Threading Stack Isolation and Local VariablesEasy🔁⭐💡📄🎓VU🏛️VU

During concurrent multi-threading, each individual thread maintains a dedicated execution stack containing function calls, parameters, and ________ variables.

A.Global
B.Local
C.Legal
D.Illegal

Q70

❓ MCQ📘 CS401📑 Lec 14🏷️ Multi-Threading Private Stack AllocationEasy🔁⭐💡📄🎓VU🏛️VU

During concurrent thread execution, threads maintain private call stacks containing function calls, parameters, and ________ variables.

A.Global
B.Local
C.Legal
D.Illegal

Ch 14: Preemptive Multitasking & Context Switching

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

📖 Related CS401 - Computer Architecture and Assembly Language Programming Curriculum Units