Subroutines

Lecture 13: Subroutines

222 Questions172 MCQs45 Short Questions5 Long Questions

Showing 121 – 130 of 222 Questions

Page 13 of 23

Q121📝 Short Q📑 Lec 5Medium⭐High-Yield💡Conceptual

Explain the key operational differences between the `CALL` and `RET` instructions in x86 assembly language.

💻 assembly Snippet

call my_subroutine ; Pushes return address, jumps to my_subroutine
; ...
my_subroutine:
    ; Subroutine body
    ret            ; Pops return address into IP, returns to caller

Q122❓ MCQ📑 Lec 5Medium🔁Repeated⭐High-Yield💡Conceptual

What is the maximum number of parameters a subroutine can receive via registers when all available general-purpose data and index registers are utilized in the 8088 CPU?

💻 assembly Snippet

; Passing parameters via 6 general registers
mov ax, 10
mov bx, 20
mov cx, 30
mov dx, 40
mov si, 50
mov di, 60
call my_subroutine

Q123📝 Short Q📑 Lec 5Easy⭐High-Yield💡Conceptual

Why are procedures (subroutines) used in assembly language programming, and what must be the last executable instruction in a procedure?

💻 assembly Snippet

my_proc:
    ; procedure body
    ret

Q124📝 Short Q📑 Lec 5Medium⭐High-Yield💡Conceptual🌟Starred

Provide valid 8088 assembly instruction(s) to move the word value located at the top of the stack directly into the Instruction Pointer (IP) register.

💻 assembly Snippet

ret

Q125❓ MCQ📑 Lec 5Easy🔁Repeated⭐High-Yield💡Conceptual

In 8088 assembly language, the CALL instruction transfers execution control ________ to a procedure by saving the return address onto the stack.

💻 assembly Snippet

call my_proc

A.Permanently
B.Temporarily
C.Permanently when CALL is near
D.Permanently when CALL is far

Q126❓ MCQ📑 Lec 5Medium🔁Repeated⭐High-Yield💡Conceptual

The far return instruction (RETF) pops two 16-bit words off the stack; into which register is the second word (the segment address) loaded?

💻 assembly Snippet

retf

A.CS register
B.DS register
C.SS register
D.ES register

Q127📝 Short Q📑 Lec 5Easy⭐High-Yield💡Conceptual

Define 'Program Flow' in assembly language programming and explain how conditional branching, loops, and function calls alter sequential instruction execution.

💻 assembly Snippet

call my_subroutine
jmp next_step

Q128🧠 Long Problem📑 Lec 5Hard🔁Repeated⭐High-Yield💡Conceptual🌟Starred

Differentiate between permanent control diversion (JMP) and temporary control diversion (CALL / RET) in 8088 assembly language, detailing stack operations performed by CALL and RET.

💻 assembly Snippet

call my_func
...
my_func:
    ret

Q129📝 Short Q📑 Lec 5Medium🔁Repeated⭐High-Yield💡Conceptual

Describe the primary methods used for Parameter Passing to subroutines in 8088 assembly language, highlighting the advantages and trade-offs of using CPU registers versus the Stack Frame.

💻 assembly Snippet

push ax
push bx
call calculate

Q130📝 Short Q📑 Lec 5Easy🔁Repeated⭐High-Yield💡Conceptual

Define a subroutine in assembly language programming and explain why parameters are passed from the caller to a subroutine.

💻 assembly Snippet

call my_subroutine

Subroutines

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