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.

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Q51

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (AND Bit Masking and Testing)Easy🔁⭐💡📄🎓VU🏛️VU

Which bitwise logical instruction is primarily used as a bit-masking operation to check whether specific bits of a number are set (1) or cleared (0)?

💻 assembly Snippet

and ax, 0x0001 ; Checks if bit 0 is set

A.AND
B.OR
C.XOR
D.NOT

Q52

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (XOR Selective Bit Inversion)Easy🔁⭐💡📄🎓VU🏛️VU

Which bitwise logical instruction is used as a masking operation to selectively invert (toggle) specific bits of an operand?

💻 assembly Snippet

xor ax, 0x00FF ; Inverts lower 8 bits of AX while leaving upper 8 bits unchanged

A.AND
B.OR
C.XOR
D.NOT

Q53

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (Masking Operation Classification)Easy🔁⭐💡📄🎓VU🏛️VU

Bitwise masking operations in assembly language are fundamentally classified into four core functional categories: selective bit __________.

A.Clearing, Setting, Inversion, and Testing
B.Setting, Clearing, Moving, and Testing
C.Addition, Subtraction, Multiplication, and Division
D.None of the given

Q54

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (Left Shift Operation Mechanics)Easy🔁⭐💡📄🎓VU🏛️VU

During a logical or arithmetic Bitwise Left-Shift Operation (`SHL` / `SAL`), what happens to the Most Significant Bit (leftmost bit)?

💻 assembly Snippet

shl ax, 1 ; Leftmost bit shifted into Carry Flag (CF)

A.will drop
B.will go into CF
C.Will come to the right most
D.will be always 1

Q55

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (Left Shift Arithmetic Multiplication)Easy🔁⭐💡📄🎓VU🏛️VU

Suppose the decimal number 35 is shifted binary 2 bits to the left (`35 << 2`). What is its new decimal value?

💻 assembly Snippet

mov al, 35 ; Binary: 00100011 (35 decimal)
shl al, 2  ; Binary: 10001100 (140 decimal)

A.35
B.70
C.140
D.17

Q56

📝 Short Q📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (Program Control Instructions)Easy🔁⭐💡📄🎓VU🏛️VU

Write any two program control / flow control instructions used in 16-bit x86 assembly language.

💻 assembly Snippet

jmp target_label ; Unconditional branch
call subroutine  ; Subroutine call branch

Q57

📝 Short Q📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (ROR Rotate Right Mechanics)Easy🔁⭐💡📄🎓VU🏛️VU

Explain the function and mechanism of the Rotate Right (`ROR`) assembly instruction.

💻 assembly Snippet

mov al, 10000001b
ror al, 1 ; AL becomes 11000000b, CF = 1

Q58

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (JA Unsigned Comparison Logic)Medium🔁⭐💡📄🎓VU🏛️VU

If `AX` contains decimal -2 (0xFFFE in 16-bit hex) and `BX` contains decimal +2 (0x0002 in hex), what happens after executing `CMP AX, BX` followed by `JA label`?

💻 assembly Snippet

mov ax, -2 ; AX = 0xFFFE (65534 unsigned)
mov bx, 2  ; BX = 0x0002 (2 unsigned)
cmp ax, bx ; 65534 > 2 -> CF = 0, ZF = 0
ja  label  ; Jump is taken!

A.Zero flag will set
B.Jump will be taken
C.ZF will contain value -4
D.Jump will not be taken

Q59

📝 Short Q📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (SHR vs SAR Differences)Easy🔁⭐💡📄🎓VU🏛️VU

What is the key functional difference between the `SHR` (Shift Logical Right) and `SAR` (Shift Arithmetic Right) instructions?

💻 assembly Snippet

mov al, 10000000b ; -128 signed / 128 unsigned
shr al, 1 ; AL = 01000000b (64)
sar al, 1 ; AL = 11000000b (-64)

Q60

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Bit Manipulation (Logical Right Shift Integer Division)Easy🔁⭐💡📄🎓VU🏛️VU

If register `BL` contains decimal 5 (`00000101b`), what value will `BL` hold after performing a single bitwise right shift (`SHR BL, 1`)?

💻 assembly Snippet

mov bl, 5 ; BL = 00000101b (5)
shr bl, 1 ; BL = 00000010b (2 integer)

A.2
B.2.5
C.5
D.10

Ch 06: Parameter Passing and Stack Frames

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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