Ch 06: Parameter Passing and Stack Frames

Detailed analysis of stack frame construction (push bp; mov bp, sp), accessing parameters via [bp+4], [bp+6], allocating local automatic variables via [bp-2], and stack cleanup conventions (cdecl vs stdcall).

216 Questions216 MCQs0 Short Questions0 Long Questions

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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 216 Questions

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Q131

❓ MCQ📘 CS401📑 Lec 6🏷️ Repeat Prefixes and String InstructionsMedium🔁⭐💡📄🎓VU🏛️VU

When executed with the REP prefix (e.g., REP STOSW), how is the CX register modified after each iteration?

💻 assembly Snippet

rep stosw

A.Decremented by 1
B.Decremented by 2
C.Incremented by 1
D.Incremented by 2

Q132

❓ MCQ📘 CS401📑 Lec 6🏷️ Direction Flag and String Pointer Auto-Increment/DecrementMedium🔁⭐💡📄🎓VU🏛️VU

In the STOSW instruction, when the Direction Flag (DF) is set (DF = 1), how is the Destination Index (DI) register modified?

💻 assembly Snippet

std
stosw

A.Decremented by 1
B.Decremented by 2
C.Incremented by 1
D.Incremented by 2

Q133

❓ MCQ📘 CS401📑 Lec 6🏷️ Block Movement Instructions and Flag BehaviorEasy🔁⭐💡📄🎓VU🏛️VU

Which of the following status flags in the FLAGS register are affected by the MOVSW instruction?

💻 assembly Snippet

movsw

A.Direction Flag (DF)
B.Parity Flag (PF)
C.Zero Flag (ZF)
D.No effect on flags

Q134

🧠 Long Problem📘 CS401📑 Lec 6🏷️ Array Sorting Verification and Stack SubroutinesHard⭐💡🌟📄🎓VU🏛️VU

Write an 8088 assembly language subroutine named 'ShowResult' that receives two memory addresses via the stack: the address pushed first is the starting location of a 16-bit signed integer array, and the address pushed second is the memory location containing the array length. The subroutine must determine whether the array elements are sorted in strictly ascending order and print 'Yes' on the screen if sorted, or 'No' if not sorted. Ensure proper stack frame management, register preservation, and stack cleanup.

💻 assembly Snippet

push array_addr
push length_addr
call ShowResult

Q135

❓ MCQ📘 CS401📑 Lec 6🏷️ Display Memory Structure and Character RepresentationEasy🔁⭐💡📄🎓VU🏛️VU

In text mode video memory, how many bytes are allocated to represent a single character cell location on the screen?

💻 assembly Snippet

mov word [es:0], 0x0741    ; Write ASCII 'A' (0x41) with attribute 0x07

A.One byte
B.Two bytes
C.Four bytes
D.Eight bytes

Q136

❓ MCQ📘 CS401📑 Lec 6🏷️ Graphics Mode Memory MappingEasy⭐💡📄🎓VU🏛️VU

In graphics display mode, a specific location in video memory maps directly to a ________ on the physical screen.

💻 assembly Snippet

mov ah, 0x0C
mov al, 0x0F
int 0x10

A.Line
B.Dot (Pixel)
C.Circle
D.Rectangle

Q137

📝 Short Q📘 CS401📑 Lec 6🏷️ ASCII Encoding and Text Mode Video Display MemoryEasy🔁⭐💡📄🎓VU🏛️VU

What is the ASCII encoding standard, and how are ASCII character codes used in x86 text mode video memory to render characters on screen?

💻 assembly Snippet

mov ax, 0xB800
mov es, ax
mov byte [es:0], 'A'
mov byte [es:1], 0x07

Q138

📝 Short Q📘 CS401📑 Lec 6🏷️ Standard ASCII vs IBM Extended ASCII EncodingEasy🔁⭐💡📄🎓VU🏛️VU

What is the ASCII character encoding standard, and how does standard 7-bit ASCII (0–127) differ from IBM Extended ASCII (128–255)?

💻 assembly Snippet

mov al, 'A'
mov bl, 201

Q139

🧠 Long Problem📘 CS401📑 Lec 6🏷️ Display Memory Formation and Text Mode VRAM ArchitectureHard🔁⭐💡🌟📄🎓VU🏛️VU

Explain the architecture and physical memory layout of Text Mode Display Memory (VGA) in IBM-compatible PCs, including screen resolution, memory base address, character cell byte structures, and physical address calculation for a given row and column.

💻 assembly Snippet

mov ax, 0xB800
mov es, ax
; Offset = (row * 80 + col) * 2

Q140

📝 Short Q📘 CS401📑 Lec 6🏷️ VGA Font Rendering and Bitmask Pixel SynthesisMedium🔁⭐💡📄🎓VU🏛️VU

How are character shapes and font glyphs rendered on a VGA screen from ASCII codes stored in video display memory?

Ch 06: Parameter Passing and Stack Frames

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

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CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

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