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

🎯 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 101 – 110 of 395 Questions

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Q101

🧠 Long Problem📘 CS401📑 Lec 2🏷️ Segmented Memory Model and Segment AssociationHard⭐💡📄🎓VU🏛️VU

Compare the roles of the Code Segment Register (CS) and Data Segment Registers (DS / general data registers) in 8088 architecture.

💻 assembly Snippet

mov ax, cs
mov ds, ax

Q102

❓ MCQ📘 CS401📑 Lec 2🏷️ Stack Mechanics and Push/Pop OperationsEasy🔁⭐💡📄🎓VU🏛️VU

Which 8088 assembly instruction decrements the Stack Pointer (SP) by two bytes and then transfers a 16-bit word from the source operand onto the top of the stack?

💻 assembly Snippet

push ax    ; Decrements SP by 2 and stores AX at [ss:sp]

A.PUSH
B.POP
C.CALL
D.MOV

Q103

📝 Short Q📘 CS401📑 Lec 2🏷️ FLAGS Register Access and Stack OperationsEasy🔁⭐💡📄🎓VU🏛️VU

Provide valid 8088 assembly instruction(s) to copy the contents of the FLAGS register into register AX.

💻 assembly Snippet

pushf
pop ax

Q104

📝 Short Q📘 CS401📑 Lec 2🏷️ Stack Operations and PUSH/POP MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

Describe the working mechanism and stack operation of the POP instruction in 8088 assembly language.

💻 assembly Snippet

pop ax

Q105

📝 Short Q📘 CS401📑 Lec 2🏷️ Stack Pointer Mechanics during Push OperationsEasy🔁⭐💡📄🎓VU🏛️VU

When the instruction 'push ax' is executed in a downward-growing (decrementing) stack, how does the value of SP (Stack Pointer) change?

💻 assembly Snippet

push ax

Q106

❓ MCQ📘 CS401📑 Lec 2🏷️ Instruction Operands and Addressing ModesEasy🔁⭐💡📄🎓VU🏛️VU

In 8088 assembly language instructions, a constant (immediate value) can never be used as a ________ operand.

💻 assembly Snippet

mov ax, 10    ; Valid: 10 is source
mov 10, ax    ; Invalid: Constant cannot be destination

A.Source
B.Destination
C.Memory
D.Register

Q107

❓ MCQ📘 CS401📑 Lec 2🏷️ Data Movement Restrictions and Memory AccessEasy🔁⭐💡📄🎓VU🏛️VU

True or False: In 8088 assembly language, a single MOV instruction can copy data directly from one memory location to another memory location (e.g., 'mov [num2], [num1]').

💻 assembly Snippet

; Invalid instruction:
mov [num2], [num1]

; Valid equivalent:
mov ax, [num1]
mov [num2], ax

A.True
B.False

Q108

❓ MCQ📘 CS401📑 Lec 2🏷️ Operand Size Matching RulesEasy🔁⭐💡📄🎓VU🏛️VU

True or False: In 8088 assembly language, arithmetic and data movement instructions allow mixing operands of different sizes (such as adding an 8-bit register directly to a 16-bit register: 'add bx, al') without explicit zero/sign extension.

💻 assembly Snippet

; Invalid mismatched operation:
add bx, al

; Valid size-matched operation:
mov ah, 0
add bx, ax

A.True
B.False

Q109

❓ MCQ📘 CS401📑 Lec 2🏷️ Assembly Language Instructions and OperandsEasy⭐📄🎓VU🏛️VU

In the 8088 assembly language instruction 'MOV AX, 5', how many operands are present?

💻 assembly Snippet

mov ax, 5

Q110

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

All memory addressing modes in the Intel 8088 (iAPX88) processor calculate an offset within a segment, which is called the ________ address.

💻 assembly Snippet

mov ax, [bx+si+4]    ; Effective Address EA = BX + SI + 4

A.Effective Address
B.Indirect Address
C.Direct Address
D.Faulty Address

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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