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Lecture 8: Branching

261 Questions205 MCQs51 Short Questions5 Long Questions
Showing 51 – 60 of 261 Questions
Page 6 of 27
Q51❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
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
  1. A.SI and SS
  2. B.PI and DI
  3. C.SI and IP
  4. D.SI and DI
Q52❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
Which processor register is bit-wise significant, meaning each individual bit position has a distinct status or control meaning?
  1. A.AX
  2. B.FS
  3. C.IP
  4. D.Flags Register
Q53❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
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)
  1. A.carry flag
  2. B.Parity Flag
  3. C.Auxiliary Carry
  4. D.Zero Flag
Q54❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
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
  1. A.TRUE
  2. B.FALSE
Q55❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
Executing the assembly operation `add ax, bx` performs which action?
💻 assembly Snippet
add ax, bx ; AX = AX + BX (BX remains unchanged)
  1. A.Add the bx to ax and change the bx
  2. B.Add the ax to bx and change the ax
  3. C.Add the bx to ax and change the ax
  4. D.Add the bx to ax and change nothing
Q56❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
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
  1. A.1byte
  2. B.4bit
  3. C.16bit
  4. D.2byte
Q57❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
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
  1. A.No comments Will be
  2. B.; accumulate sum in add
  3. C.; accumulate sum in ax
  4. D.; accumulate sum in Bx
Q58❓ MCQ📑 Lec 3Medium🔁Repeated⭐High-Yield💡Conceptual
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)
  1. A.Quotient in AX, Remainder in DX
  2. B.Quotient in DX, Remainder in AX
  3. C.Quotient in AL, Remainder in AH
  4. D.Quotient in CX, Remainder in BX
Q59❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
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
  1. A.16bit
  2. B.17bit
  3. C.32bit
  4. D.64bit
Q60❓ MCQ📑 Lec 3Easy🔁Repeated⭐High-Yield💡Conceptual
Which x86 assembly language instruction is used to perform integer division (as opposed to floating-point division)?
  1. A.DIV instruction
  2. B.ADC instruction
  3. C.SBB instruction
  4. D.DIVI instruction

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Introduction to Assembly Language 1PracticeIntroduction to Assembly Language 2PracticeIntroduction to Assembly Language 3PracticeSegmented Memory ModelPracticeData Declaration and Direct AddressingPracticeIndirect AddressingPractice