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 221 – 222 of 222 Questions

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Q221

📝 Short Q📘 CS401📑 Lec 5🏷️ 5.1. String InstructionsEasy⭐💡📄🎓VU🏛️VU

What is the Direction Flag (DF) in 8086 assembly language, and how does it control string manipulation processing?

💻 assembly Snippet

; Setting Direction Flag for String Processing
cld    ; Clear DF (DF = 0): Auto-increment mode (left to right)
std    ; Set DF (DF = 1): Auto-decrement mode (right to left)

Q222

📝 Short Q📘 CS401📑 Lec 5🏷️ 5.1. String InstructionsMedium⭐💡📄🎓VU🏛️VU

What are the Source Index (SI) and Destination Index (DI) registers in 8086 assembly language, and how do their default segment associations operate?

💻 assembly Snippet

; Block copy using SI and DI registers
mov si, src_offset ; Source offset relative to DS
mov di, dst_offset ; Destination offset relative to ES
cld                ; Clear direction flag (auto-increment)
movsb              ; Copy byte from [DS:SI] to [ES:DI]

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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