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 221 – 230 of 261 Questions

Page 23 of 27

Q221

❓ MCQ📘 CS401📑 Lec 3🏷️ ADC (Add with Carry) Operand CountEasy🔁⭐💡📄🎓VU🏛️VU

In x86 assembly language, how many explicit operands does the ADC (Add with Carry) instruction take?

💻 assembly Snippet

adc ax, bx

A.0 Operands
B.1 Operand
C.2 Operands
D.3 Operands

Q222

❓ MCQ📘 CS401📑 Lec 3🏷️ Far Jump Absolute AddressingEasy🔁⭐💡📄🎓VU🏛️VU

A 'Far' jump instruction is not position-relative but is classified as:

💻 assembly Snippet

jmp far ptr target_label

A.Memory dependent
B.Absolute
C.Temporary
D.Indirect

Q223

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Conditional JumpsHard🔁⭐💡📄🎓VU🏛️VU

If AX contains decimal -2 (0xFFFE) and BX contains decimal 2 (0x0002), what will occur after executing 'CMP AX, BX' followed by 'JA label'?

💻 assembly Snippet

mov ax, -2   ; AX = 0xFFFE
mov bx, 2    ; BX = 0x0002
cmp ax, bx   ; Unsigned comparison: 65534 > 2
ja target    ; Branch taken because CF = 0 and ZF = 0

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

Q224

📝 Short Q📘 CS401📑 Lec 3🏷️ 3.3. Unconditional JumpEasy🔁⭐💡📄🎓VU🏛️VU

Write down any two control flow instructions used in 8088 assembly language.

Q225

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.2. Unconditional JumpMedium🔁⭐💡📄🎓VU🏛️VU

A Far Jump instruction is not position-relative; instead, it specifies a destination address that is:

💻 assembly Snippet

jmp 0x1234:0x0100  ; Absolute Far Jump

A.Memory dependent
B.Absolute
C.Temporary
D.Indirect

Q226

📝 Short Q📘 CS401📑 Lec 3🏷️ 3.3. Unconditional JumpMedium🔁⭐💡📄🎓VU🏛️VU

What does the following assembly code sequence do? mov cx, 0xffff loop $

💻 assembly Snippet

mov cx, 0xffff
loop $

Q227

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Conditional JumpsEasy🔁⭐💡📄🎓VU🏛️VU

What is the primary difference between conditional jump instructions JNE (Jump if Not Equal) and JNZ (Jump if Not Zero)?

💻 assembly Snippet

jne target_label
jnz target_label  ; Both assemble to opcode 0x75

A.Programmer or logic readability
B.Assembler opcode encoding
C.Debugger execution
D.iAPX88 hardware execution

Q228

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.2. Unconditional JumpEasy🔁⭐💡📄🎓VU🏛️VU

An assembly instruction that transfers program execution control to a target location regardless of processor flag states is called an:

💻 assembly Snippet

jmp target_label

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

Q229

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Conditional JumpsEasy🔁⭐💡📄🎓VU🏛️VU

When an unsigned source operand is subtracted from a smaller unsigned destination operand, a borrow is required. Which status flag is set as a result?

💻 assembly Snippet

sub ax, bx  ; Sets CF = 1 if AX < BX

A.Carry Flag cleared (CF = 0)
B.Carry Flag set (CF = 1)
C.Carry Flag set and Zero Flag set (CF = 1, ZF = 1)
D.None of the given options

Q230

❓ MCQ📘 CS401📑 Lec 3🏷️ 3.1. Conditional JumpsEasy🔁⭐💡📄🎓VU🏛️VU

When comparing operands using a CMP instruction (which subtracts the source from the destination), setting the Zero Flag (ZF = 1) indicates that:

💻 assembly Snippet

cmp ax, bx  ; ZF = 1 if AX == BX

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

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

📖 Related CS401 - Computer Architecture and Assembly Language Programming Curriculum Units