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 171 – 180 of 222 Questions

Page 18 of 23

Q171

📝 Short Q📘 CS401📑 Lec 5🏷️ PUSH Instruction MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

Describe the execution mechanism and function of the PUSH instruction in 8088 assembly language.

💻 assembly Snippet

push ax

Q172

📝 Short Q📘 CS401📑 Lec 5🏷️ Function Calling Conventions and Scratch RegistersEasy🔁⭐💡📄🎓VU🏛️VU

Which CPU registers are conventionally treated as caller-saved (scratch) registers during function calls in x86 architecture?

💻 assembly Snippet

call my_func

Q173

❓ MCQ📘 CS401📑 Lec 5🏷️ Far Subroutine Return (RETF) MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

The RETF (Return Far) instruction pops the target segment address off the stack into which segment register?

💻 assembly Snippet

retf

A.CS (Code Segment) register
B.DS (Data Segment) register
C.SS (Stack Segment) register
D.ES (Extra Segment) register

Q174

❓ MCQ📘 CS401📑 Lec 5🏷️ Parameter Passing Calling Conventions (C vs Pascal)Easy🔁⭐💡📄🎓VU🏛️VU

How many traditional parameter passing calling conventions (specifically C calling convention and Pascal calling convention) exist in standard x86 assembly language programming?

Q175

📝 Short Q📘 CS401📑 Lec 5🏷️ Subroutine Return with Immediate Stack Cleanup (RET n)Easy🔁⭐💡📄🎓VU🏛️VU

What is the exact execution result of the subroutine return instruction 'RET 2'?

💻 assembly Snippet

ret 2

Q176

❓ MCQ📘 CS401📑 Lec 5🏷️ Subroutine Calling Conventions (C vs Pascal)Easy🔁⭐💡📄🎓VU🏛️VU

How many prevalent traditional calling conventions (specifically C calling convention and Pascal calling convention) exist in assembly language programming?

Q177

❓ MCQ📘 CS401📑 Lec 5🏷️ Subroutine Calling Conventions (C vs Pascal)Easy🔁⭐💡📄🎓VU🏛️VU

How many prevalent traditional calling conventions (specifically the C calling convention and the Pascal calling convention) exist in standard x86 assembly language programming?

Q178

📝 Short Q📘 CS401📑 Lec 5🏷️ Calling Conventions Stack Cleanup (C vs Pascal)Easy🔁⭐💡📄🎓VU🏛️VU

Who is responsible for removing parameters from the stack during subroutine calls in the C calling convention versus the Pascal calling convention?

💻 assembly Snippet

; C Calling Convention (Caller cleans stack)
call my_func
add sp, 4

; Pascal Calling Convention (Callee cleans stack)
my_func:
  ; body
  ret 4

Q179

❓ MCQ📘 CS401📑 Lec 5🏷️ Role of DX Register in 16-Bit Multiplication and DivisionEasy⭐💡📄🎓VU🏛️VU

In 8088 16-bit arithmetic operations, register DX plays an essential role in holding the upper 16 bits during:

💻 assembly Snippet

mul bx
div bx

A.Multiplication and Division
B.Addition and Subtraction
C.Bit shifting and Rotating
D.Logical AND/OR operations

Q180

❓ MCQ📘 CS401📑 Lec 5🏷️ SHR (Shift Logical Right) Instruction ExecutionMedium⭐💡📄🎓VU🏛️VU

If register BL contains binary 00000101 (5), what value will BL contain after executing a single Logical Shift Right ('SHR BL, 1') instruction?

💻 assembly Snippet

mov bl, 00000101b
shr bl, 1

A.00000010
B.00000011
C.00001010
D.00000001

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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