Ch 02: 16-Bit Segmented Memory Model & Addressing Modes

Deep dive into 16-bit real mode memory segmentation (CS, DS, SS, ES), pointer/index registers (SP, BP, SI, DI), and calculating effective physical addresses across memory boundaries.

395 Questions395 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 151 – 160 of 395 Questions

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Q151

❓ MCQ📘 CS401📑 Lec 2🏷️ Overlapping Memory SegmentsEasy🔁⭐💡📄🎓VU🏛️VU

In a program where CS, DS, SS, and ES all hold the exact same segment base value, this configuration is called __________.

💻 assembly Snippet

mov ax, cs
mov ds, ax
mov es, ax
mov ss, ax

A.equal memory
B.overlapping segments
C.segment hiding
D.overlapping SI

Q152

❓ MCQ📘 CS401📑 Lec 2🏷️ Paragraph Boundaries and 16-Byte Segment AlignmentEasy🔁⭐💡📄🎓VU🏛️VU

In 8088 real mode architecture, memory segments can only begin at 16-byte aligned address boundaries called __________ boundaries.

A.segment
B.paragraph
C.cell
D.RAM

Q153

❓ MCQ📘 CS401📑 Lec 2🏷️ NASM Data Types (DB Directive)Easy🔁⭐💡📄🎓VU🏛️VU

In the NASM assembly data declaration statement 'num1: db 5', what is the size of the allocated memory location?

💻 assembly Snippet

num1: db 5

A.1 byte
B.4 bits
C.16 bits
D.2 bytes

Q154

❓ MCQ📘 CS401📑 Lec 2🏷️ Register Addressing ModeEasy🔁⭐💡📄🎓VU🏛️VU

Which addressing mode is used in the assembly instruction 'MOV AX, BX'?

💻 assembly Snippet

mov ax, bx

A.Immediate Addressing
B.Indirect Addressing
C.Direct Addressing
D.Register Addressing

Q155

❓ MCQ📘 CS401📑 Lec 2🏷️ Based Register Indirect Addressing ModeEasy🔁⭐💡📄🎓VU🏛️VU

Which addressing mode is used in the assembly instruction 'MOV AX, [BX]'?

💻 assembly Snippet

mov ax, [bx]

A.Based Register Indirect Addressing
B.Indirect Addressing
C.Base Indirect Addressing
D.Immediate Addressing

Q156

❓ MCQ📘 CS401📑 Lec 2🏷️ Immediate Addressing ModeEasy🔁⭐💡📄🎓VU🏛️VU

Which addressing mode is used in the assembly instruction 'MOV AX, 5'?

💻 assembly Snippet

mov ax, 5

A.Immediate Addressing Mode
B.Direct Addressing Mode
C.Register Addressing Mode
D.Indirect Addressing Mode

Q157

❓ MCQ📘 CS401📑 Lec 2🏷️ Based Register + Offset Addressing ModeMedium🔁⭐💡📄🎓VU🏛️VU

Which addressing mode is used in the assembly instruction 'MOV AX, [num1 + BX]'?

💻 assembly Snippet

mov ax, [num1 + bx]

A.Offset + Indirect Addressing
B.Register + Direct Addressing
C.Indirect + Reference Addressing
D.Based Register + Offset Addressing

Q158

❓ MCQ📘 CS401📑 Lec 2🏷️ Effective Address CalculationEasy🔁⭐💡📄🎓VU🏛️VU

In segmented architecture addressing, what is the resulting 16-bit offset address obtained by adding base/index register values to a displacement offset called?

A.Address
B.Mode
C.Effective Address
D.Physical Address

Q159

❓ MCQ📘 CS401📑 Lec 2🏷️ Segment Override PrefixesMedium🔁⭐💡📄🎓VU🏛️VU

In the instruction 'MOV AX, [CS:BX]', what is the exact effect of the segment override prefix 'CS:'?

💻 assembly Snippet

mov ax, [cs:bx]

A.Associates segment CS with register AX for memory access
B.Associates register BX with segment CS instead of the default segment DS
C.Associates register BX with register AX
D.None of the given options

Q160

❓ MCQ📘 CS401📑 Lec 2🏷️ Effective Address ComputationEasy🔁⭐💡📄🎓VU🏛️VU

Given BX = 0x0100 and DS = 0xFFF0, what is the calculated Effective Address (EA) for the instruction 'MOV [BX + 0x0100], AX'?

💻 assembly Snippet

mov [bx + 0x0100], ax

A.0x0020
B.0x0200
C.0x0300
D.0x02000

Ch 02: 16-Bit Segmented Memory Model & Addressing Modes

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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