Ch 08: String Instructions and Primitives

Comprehensive study of x86 string primitives operating across DS:SI and ES:DI, hardware-accelerated memory copy, screen clearing via STOSW, string length calculation via SCASB, and string comparison via CMPSB.

307 Questions307 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 71 – 80 of 307 Questions

Page 8 of 31

Q71

📝 Short Q📘 CS401📑 Lec 8🏷️ 8.1. Hardware Interrupts (INT 3 Breakpoint Interrupt Mechanics)Medium⭐💡📄🎓VU🏛️VU

Briefly describe the functionality and usage of `INT 3` in x86 microprocessor architecture.

💻 assembly Snippet

int 3 ; Special 1-byte breakpoint opcode (0xCC)

Q72

❓ MCQ📘 CS401📑 Lec 8🏷️ 8.1. Hardware Interrupts (Interrupt Service Routine ISR Definition)Easy🔁⭐💡📄🎓VU🏛️VU

The software routine that executes in response to a hardware or software interrupt (`INT`) instruction is called a(n) __________.

A.ISR
B.IRS
C.ISP
D.IRT

Q73

❓ MCQ📘 CS401📑 Lec 8🏷️ Interrupt Types and Non-Maskable InterruptsMedium⭐💡📄🎓VU🏛️VU

Which of the following interrupt vectors in the x86 architecture is assigned to the hardware Non-Maskable Interrupt (NMI)?

A.INT 0
B.INT 1
C.INT 2
D.INT 3

Q74

❓ MCQ📘 CS401📑 Lec 8🏷️ Software Interrupt Execution MechanismEasy🔁⭐💡📄🎓VU🏛️VU

Which 8088 assembly language instruction is used to invoke a software interrupt routine?

💻 assembly Snippet

mov ax, 0x4c00
int 0x21        ; Invokes DOS terminate service via software interrupt

A.GO INT interrupt_number
B.Call interrupt_number
C.INT interrupt_number
D.Call INT interrupt_number

Q75

📝 Short Q📘 CS401📑 Lec 8🏷️ Software Interrupt Mechanics and Stack OperationsMedium🔁⭐💡📄🎓VU🏛️VU

Describe the changes that occur on the stack when an INT (software interrupt) instruction is executed in the 8088 microprocessor.

💻 assembly Snippet

int 0x21

Q76

❓ MCQ📘 CS401📑 Lec 8🏷️ Dedicated CPU Interrupts and INTO InstructionEasy🔁⭐💡📄🎓VU🏛️VU

Which software interrupt vector is automatically invoked by the INTO instruction when an arithmetic overflow occurs (Overflow Flag OF = 1)?

💻 assembly Snippet

add ax, bx
into        ; Generates INT 4 if Overflow Flag (OF) is set

A.INT 1
B.INT 2
C.INT 3
D.INT 4

Q77

📝 Short Q📘 CS401📑 Lec 8🏷️ Interrupt Flag (IF) and Critical SectionsEasy🔁⭐💡📄🎓VU🏛️VU

Define the Interrupt Flag (IF) in the 8088 microprocessor and detail its function in controlling maskable hardware interrupts.

💻 assembly Snippet

cli
; critical section
sti

Q78

❓ MCQ📘 CS401📑 Lec 8🏷️ BIOS Video Services (INT 10h)Easy🔁⭐💡📄🎓VU🏛️VU

Which software interrupt vector is used by the system to invoke BIOS video services in assembly language?

💻 assembly Snippet

mov ah, 0x00
mov al, 0x03
int 0x10

A.RAM Services
B.Disk Services
C.BIOS Video Services
D.DOS Video Services

Q79

❓ MCQ📘 CS401📑 Lec 8🏷️ Interrupt Return (IRET) MechanicsEasy🔁⭐💡📄🎓VU🏛️VU

Which instruction is used to exit an Interrupt Service Routine (ISR) and restore pre-interrupt CPU execution state in 8088 assembly language?

💻 assembly Snippet

iret

A.RET
B.RETF
C.IRET
D.POP

Q80

❓ MCQ📘 CS401📑 Lec 8🏷️ Hardware Interrupt Pins (INTR and NMI)Easy🔁⭐📄🎓VU🏛️VU

How many physical processor pins on the 8088 CPU are utilized by external hardware components to signal interrupts?

A.1 Pin
B.2 Pins
C.3 Pins
D.4 Pins

Ch 08: String Instructions and Primitives

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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