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 51 – 60 of 261 Questions

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Q51

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Register Architecture (Index Registers SI and DI)Easy🔁⭐💡📄🎓VU🏛️VU

Which registers serve as the primary Index Registers in x86 Intel architecture to hold memory addresses for string and block memory access?

💻 assembly Snippet

mov si, src_buffer
mov di, dest_buffer
rep movsb ; Uses SI and DI as source and destination index pointers

A.SI and SS
B.PI and DI
C.SI and IP
D.SI and DI

Q52

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Register Architecture (FLAGS Register Bit Layout)Easy🔁⭐💡📄🎓VU🏛️VU

Which processor register is bit-wise significant, meaning each individual bit position has a distinct status or control meaning?

A.AX
B.FS
C.IP
D.Flags Register

Q53

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (Carry Flag Addition Overflow)Easy🔁⭐💡📄🎓VU🏛️VU

When two 16-bit numbers are added, the sum can be 17 bits long. Where is this extra 17th carry bit placed so it can be subsequently tested?

💻 assembly Snippet

add ax, bx ; 17th bit stored in Carry Flag (CF)

A.carry flag
B.Parity Flag
C.Auxiliary Carry
D.Zero Flag

Q54

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (Intel Syntax Operand Order)Easy🔁⭐💡📄🎓VU🏛️VU

True or False: In Intel x86 assembly language syntax, instructions are formatted as `operation destination, source`.

💻 assembly Snippet

mov ax, bx ; Destination = AX, Source = BX

A.TRUE
B.FALSE

Q55

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (ADD Instruction Action)Easy🔁⭐💡📄🎓VU🏛️VU

Executing the assembly operation `add ax, bx` performs which action?

💻 assembly Snippet

add ax, bx ; AX = AX + BX (BX remains unchanged)

A.Add the bx to ax and change the bx
B.Add the ax to bx and change the ax
C.Add the bx to ax and change the ax
D.Add the bx to ax and change nothing

Q56

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (Define Byte DB Directive)Easy🔁⭐💡📄🎓VU🏛️VU

In assembly language, allocating data using the Define Byte directive (e.g., `num1: db 0`) reserves how much memory space?

💻 assembly Snippet

num1: db 0 ; Allocates 1 byte of memory

A.1byte
B.4bit
C.16bit
D.2byte

Q57

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (ADD AX, BX Accumulation Comment)Easy🔁⭐💡📄🎓VU🏛️VU

Consider the following assembly code snippet: ```assembly [org 0x0100] mov ax, [num1] ; load first number in ax mov bx, [num2] ; load second number in bx add ax, bx ; _________________________________ int 0x21 num1: dw 5 num2: dw 10 ``` What is the most appropriate code comment for line 4 (`add ax, bx`)?

💻 assembly Snippet

add ax, bx ; accumulate sum in ax

A.No comments Will be
B.; accumulate sum in add
C.; accumulate sum in ax
D.; accumulate sum in Bx

Q58

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (16-Bit Unsigned Division DIV DX:AX)Medium🔁⭐💡📄🎓VU🏛️VU

The 16-bit unsigned division instruction `DIV operand` divides a 32-bit dividend stored in register pair `DX:AX` by its 16-bit operand. Where are the quotient and remainder stored upon completion?

💻 assembly Snippet

mov dx, 0
mov ax, 100
mov cx, 7
div cx ; AX = 14 (Quotient), DX = 2 (Remainder)

A.Quotient in AX, Remainder in DX
B.Quotient in DX, Remainder in AX
C.Quotient in AL, Remainder in AH
D.Quotient in CX, Remainder in BX

Q59

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (DIV 16-Bit Quotient Storage in AX)Easy🔁⭐💡📄🎓VU🏛️VU

The 16-bit unsigned division instruction `DIV` divides a 32-bit dividend stored in register pair `DX:AX` by a 16-bit divisor operand and stores the __________ quotient in register `AX`.

💻 assembly Snippet

mov dx, 0
mov ax, 500
mov cx, 10
div cx ; 16-bit quotient (50) is stored in AX

A.16bit
B.17bit
C.32bit
D.64bit

Q60

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Basic Assembly Instructions (DIV Integer Division)Easy🔁⭐💡📄🎓VU🏛️VU

Which x86 assembly language instruction is used to perform integer division (as opposed to floating-point division)?

A.DIV instruction
B.ADC instruction
C.SBB instruction
D.DIVI instruction

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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