Ch 03: Branching, Loops and Program Flow

Examines program control flow in assembly, flag register evaluation (ZF, CF, SF, OF), relative displacement jumps, implementing loops, and bubble sort sorting algorithms in assembly.

261 Questions261 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 151 – 160 of 261 Questions

Page 16 of 27

Q151

🧠 Long Problem📘 CS401📑 Lec 3🏷️ Bitwise Shift Left and Mathematical MultiplicationMedium🔁⭐💡📄🎓VU🏛️VU

Explain the working mechanism, mathematical effect, bit movement, and flag updates of the SHL (Shift Logical Left) instruction in 8088 assembly language.

💻 assembly Snippet

shl ax, 1
mov cl, 3
shl bx, cl

Q152

🧠 Long Problem📘 CS401📑 Lec 3🏷️ Looping Mechanics and Summation AlgorithmsMedium⭐💡🌟📄🎓VU🏛️VU

Analyze the following 8088 assembly language code sequence and determine what value will be stored in the memory variable 'Find' after execution: ```assembly [org 0x0100] mov cx, [num1] mov ax, 0 l1: add ax, cx sub cx, 1 jnz l1 mov [Find], ax ```

💻 assembly Snippet

[org 0x0100]
mov cx, [num1]
mov ax, 0
l1:
add ax, cx
sub cx, 1
jnz l1
mov [Find], ax

Q153

🧠 Long Problem📘 CS401📑 Lec 3🏷️ Register Arithmetic and Memory PreservationMedium🔁⭐💡🌟📄🎓VU🏛️VU

Analyze the following 8088 assembly language code sequence and determine the values stored in memory variables 'num1' and 'num2', as well as the final contents of registers AX and BX after execution: ```assembly [org 0x0100] mov ax, [num1] mov bx, [num2] add ax, bx sub bx, ax add ax, bx mov ax, 0x4c00 int 0x21 num1: dw 5 num2: dw 10 ```

💻 assembly Snippet

[org 0x0100]
mov ax, [num1]
mov bx, [num2]
add ax, bx
sub bx, ax
add ax, bx
mov ax, 0x4c00
int 0x21
num1: dw 5
num2: dw 10

Q154

❓ MCQ📘 CS401📑 Lec 3🏷️ Bitwise Rotation Instructions and Carry Flag OperationsMedium🔁⭐💡📄🎓VU🏛️VU

Which bitwise bit-rotation instruction rotates the destination operand bits to the right through the Carry Flag (CF)?

💻 assembly Snippet

clc
rcr ax, 1

A.ROR (Rotate Right)
B.RCR (Rotate Through Carry Right)
C.SHR (Shift Logical Right)
D.SAR (Shift Arithmetic Right)

Q155

❓ MCQ📘 CS401📑 Lec 3🏷️ Unsigned Division and Register PairingEasy🔁⭐💡📄🎓VU🏛️VU

When a 32-bit dividend is divided by a 16-bit divisor in 8088 assembly language (using the DIV instruction), what is the bit width of the quotient stored in the AX register?

💻 assembly Snippet

mov dx, 0x0001
mov ax, 0x86A0
mov cx, 1000
div cx

A.32 bits
B.16 bits
C.8 bits
D.4 bits

Q156

📝 Short Q📘 CS401📑 Lec 3🏷️ Division Instruction Faults and INT 0Medium🔁⭐💡📄🎓VU🏛️VU

Explain what causes a Divide Overflow exception in 8088 assembly language and state which interrupt vector is automatically triggered.

💻 assembly Snippet

mov dx, 0xFFFF
mov ax, 0xFFFF
mov cx, 1
div cx

Q157

❓ MCQ📘 CS401📑 Lec 3🏷️ Unsigned Division and Implied Register UsageEasy🔁⭐💡📄🎓VU🏛️VU

When executing the 8-bit division instruction 'DIV BL', where is the implied 16-bit dividend stored?

💻 assembly Snippet

mov ax, 100
mov bl, 10
div bl

A.AX
B.BX
C.CX
D.DX

Q158

❓ MCQ📘 CS401📑 Lec 3🏷️ Hardware Exceptions and Divide Error INT 0Easy🔁⭐💡📄🎓VU🏛️VU

When a division by zero error occurs during the execution of a DIV or IDIV instruction, how is the 'Divide by Zero' interrupt handled by the CPU?

💻 assembly Snippet

mov ax, 10
mov bl, 0
div bl

A.INT 0 instruction must be written in code
B.INT 1 instruction must be written in code
C.INT 2 instruction must be written in code
D.This interrupt is generated automatically by hardware

Q159

📝 Short Q📘 CS401📑 Lec 3🏷️ Conditional vs Unconditional Jump InstructionsEasy🔁⭐💡📄🎓VU🏛️VU

Differentiate between Conditional Jump and Unconditional Jump instructions in 8088 assembly language.

💻 assembly Snippet

jmp target
jz label1

Q160

📝 Short Q📘 CS401📑 Lec 3🏷️ Position-Relative Addressing and Jump EncodingMedium🔁⭐💡📄🎓VU🏛️VU

Explain Position-Relative Addressing in jump instructions and describe how target addresses are calculated using the Instruction Pointer (IP).

💻 assembly Snippet

jmp short label1

Ch 03: Branching, Loops and Program Flow

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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