Ch 05: Subroutines and Stack Architecture

Examines stack memory allocation, downward growth of the stack, return address pushing, caller vs callee register preservation, and avoiding stack misalignment bugs.

222 Questions222 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 131 – 140 of 222 Questions

Page 14 of 23

Q131

📝 Short Q📘 CS401📑 Lec 5🏷️ Stack Architecture and PUSH / POP MechanicsMedium🔁⭐💡📄🎓VU🏛️VU

Explain the architecture and Last-In, First-Out (LIFO) operational mechanics of the system stack in 8088 assembly language, detailing the execution steps of PUSH and POP instructions.

💻 assembly Snippet

push ax
pop bx

Q132

📝 Short Q📘 CS401📑 Lec 5🏷️ Stack-Based Control Flow and Data Management InstructionsMedium🔁⭐💡📄🎓VU🏛️VU

List and describe the six primary 8088 assembly language instructions that utilize the system stack for temporary data storage, control flow redirection, and hardware/software interrupt handling.

💻 assembly Snippet

push ax
call sub1
int 0x21

Q133

🧠 Long Problem📘 CS401📑 Lec 5🏷️ Register Preservation and Stack Hygiene in SubroutinesHard🔁⭐💡🌟📄🎓VU🏛️VU

Explain why saving and restoring registers on the stack is critical when writing modular subroutines, detailing the required LIFO pushing and popping order to maintain stack hygiene.

💻 assembly Snippet

subroutine:
    push ax
    push bx
    ... 
    pop bx
    pop ax
    ret

Q134

📝 Short Q📘 CS401📑 Lec 5🏷️ Register Preservation and Subroutine TransparencyMedium🔁⭐💡📄🎓VU🏛️VU

Why is register preservation necessary when writing subroutines in 8088 assembly language, and how are PUSH and POP instructions used to achieve register transparency for the caller?

💻 assembly Snippet

push ax
push cx
...
pop cx
pop ax
ret

Q135

📝 Short Q📘 CS401📑 Lec 5🏷️ PUSH Instruction Mechanics and Stack ManipulationEasy🔁⭐💡📄🎓VU🏛️VU

Explain the internal execution sequence of the PUSH instruction in 8088 assembly language, detailing Stack Pointer (SP) modification and data transfer.

💻 assembly Snippet

push ax

Q136

📝 Short Q📘 CS401📑 Lec 5🏷️ POP Instruction Mechanics and Memory RetrievalEasy🔁⭐💡📄🎓VU🏛️VU

Explain the internal execution sequence of the POP instruction in 8088 assembly language, detailing Stack Pointer (SP) modification and data retrieval.

💻 assembly Snippet

pop bx

Q137

📝 Short Q📘 CS401📑 Lec 5🏷️ Intra-Segment CALL Mechanics and Control TransferMedium🔁⭐💡📄🎓VU🏛️VU

Describe the execution flow and stack pointer manipulations performed during an intra-segment direct CALL instruction in 8088 assembly language.

💻 assembly Snippet

call my_procedure

Q138

📝 Short Q📘 CS401📑 Lec 5🏷️ RET Instruction Mechanics and Stack CleanupMedium🔁⭐💡🌟📄🎓VU🏛️VU

Explain the operation of the RET (Return from Subroutine) instruction in 8088 assembly language, and describe how `RET n` performs callee parameter stack cleanup.

💻 assembly Snippet

ret 4

Q139

📝 Short Q📘 CS401📑 Lec 5🏷️ Subroutine Mechanics: RET vs RETF and Stack CleanupMedium🔁⭐💡📄🎓VU🏛️VU

Differentiate between a Near Return (RET) and a Far Return (RETF) instruction in 8088 assembly language in terms of stack popping sequence, register updates, and parameter cleanup (RET n).

💻 assembly Snippet

ret
retf
ret 6

Q140

📝 Short Q📘 CS401📑 Lec 5🏷️ Parameter Passing Through Stack and Stack Frame ArchitectureMedium🔁⭐💡🌟📄🎓VU🏛️VU

Explain how parameters are passed to subroutines through the stack in assembly language, detailing why parameters are pushed in reverse order and how the Base Pointer (BP) accesses them.

💻 assembly Snippet

push word [param2]
push word [param1]
call add_numbers

Ch 05: Subroutines and Stack Architecture

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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