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 61 – 70 of 216 Questions

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Q61

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

After the execution of a Shift Arithmetic Right (`SAR`) instruction on a signed binary operand, what happens to the Most Significant Bit (MSB / sign bit)?

💻 assembly Snippet

mov al, 10000000b (-128)
sar al, 1 ; AL = 11000000b (-64), MSB remains 1

A.The msb is replaced by a 0
B.The msb is replaced by 1
C.The msb retains its original value
D.The msb is replaced by the value of CF

Q62

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (Far Jump Absolute Addressing)Easy🔁⭐💡📄🎓VU🏛️VU

Unlike a short or near jump which is position-relative to the current Instruction Pointer (`IP`), a far jump instruction is __________ because it explicitly specifies both segment and offset target addresses.

💻 assembly Snippet

jmp 0x1000:0x0000 ; Absolute far jump reloads CS and IP

A.memory dependent
B.Absolute
C.temporary
D.indirect

Q63

📝 Short Q📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (Busy Wait Delay Loop via LOOP)Easy🔁⭐💡📄🎓VU🏛️VU

Briefly describe what the following assembly code sequence accomplishes in a single line: `mov cx, 0xffff` `loop $`

💻 assembly Snippet

mov cx, 0xffff ; Load max 16-bit count
loop $        ; Jump to current instruction offset ($) while CX != 0

Q64

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

The bit diagram `| 0 | --> | 1 | 1 | 0 | 1 | 0 | 0 | 0 | --> | C |` illustrates which right-shift operation where 0 enters the MSB and the LSB is shifted into the Carry Flag?

💻 assembly Snippet

shr al, 1 ; Shifts AL right: 0 -> MSB, LSB -> Carry Flag

A.Shl
B.sar
C.Shr
D.Sal

Q65

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

The bit diagram `| C | <-- | 1 | 1 | 0 | 1 | 0 | 0 | 0 | <-- | 0 |` illustrates which left-shift operation where 0 enters the LSB and the MSB is shifted into the Carry Flag?

💻 assembly Snippet

shl al, 1 ; Shifts AL left: MSB -> Carry Flag, LSB <- 0

A.Shl
B.sar
C.Shr
D.Sal

Q66

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (JNE vs JNZ Mnemonic Semantics)Easy🔁⭐💡📄🎓VU🏛️VU

Since `JNE` (Jump if Not Equal) and `JNZ` (Jump if Not Zero) assemble into the exact same machine opcode (`0x75`), the distinction between these two mnemonics exists strictly for __________.

💻 assembly Snippet

cmp ax, bx
jne label ; Checks equality logically (ZF = 0)

sub ax, 1
jnz label ; Checks zero arithmetic result (ZF = 0)

A.Programmer or Logic
B.Assembler
C.Debugger
D.iAPX88

Q67

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (Unconditional Jump JMP)Easy🔁⭐💡📄🎓VU🏛️VU

An instruction that upon execution transfers control unconditionally to a target address regardless of processor flags is called a(n) __________.

💻 assembly Snippet

jmp target_label ; Unconditional branch

A.Jump
B.Conditional jump
C.Unconditional jump
D.Stay

Q68

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (CMP Zero Flag Equality Logic)Easy🔁⭐💡📄🎓VU🏛️VU

When comparing two numbers (`CMP DEST, SRC`), if subtracting the source from the destination yields zero, the Zero Flag is set (`ZF = 1`). This indicates that __________.

💻 assembly Snippet

cmp ax, bx ; Performs AX - BX
; If AX == BX, ZF = 1

A.DEST = SRC
B.DEST!= SRC
C.DEST < SRC
D.DEST > SRC

Q69

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (Carry Flag Unsigned Below Logic)Easy🔁⭐💡📄🎓VU🏛️VU

When an unsigned source operand is subtracted from an unsigned destination operand (`CMP DEST, SRC`) and the destination is smaller (`DEST < SRC`), a borrow occurs, which sets the __________.

💻 assembly Snippet

mov ax, 5
cmp ax, 10 ; 5 - 10 requires borrow -> CF = 1

A.carry flag i.e CF = 0
B.carry flag i.e CF = 1
C.Carry Flag + ZF=1
D.None of the Given

Q70

❓ MCQ📘 CS401📑 Lec 6🏷️ 6.1. Control Flow Instructions (JBE Unsigned Below or Equal Logic)Easy🔁⭐💡📄🎓VU🏛️VU

In unsigned comparison (`CMP DEST, SRC`), if the result produces `ZF = 1` OR `CF = 1`, which relationship condition between unsigned destination (`UDEST`) and unsigned source (`USRC`) is satisfied?

💻 assembly Snippet

cmp ax, bx
jbe label ; Jumps if ZF = 1 or CF = 1 (AX <= BX unsigned)

A.DEST = SRC
B.DEST!= SRC
C.UDEST <= USRC
D.DEST > SRC

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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