CS401 Quiz 3 2024

Which of the following is the destination register in the IN instruction?

• DL or DX
• CL or CX
• BL or BX
• AL or AX

Which of the following is the standard interrupt request line assigned to the keyboard controller in traditional PC architectures?

• IRQ 0
• IRQ 1
• IRQ 2
• IRQ 3

Each entry in the interrupt vector table is how many bytes long?

• 1
• 2
• 4
• 8

In the context of data and code descriptors, which bit indicates whether the segment is currently in memory?

• DPL
• P
• S
• X

Which of the following is the standard interrupt request line assigned to the serial port COM2 in older computer systems?

• IRQ 0
• IRQ 1
• IRQ 2
• IRQ 3

How many forms does the MOVS instruction have?

• 1
• 2
• 3
• 4

Which of the following is the interrupt service routine (ISR) number used by BIOS (Basic Input/Output System) for keyboard services in older computer systems?

• INT 10
• INT 16
• INT 21
• INT 14

Which of these are the standard data pins on a parallel port used for sending data from the processor to the connected device?

• 1 to 9
• 2 to 9
• 10 to 18
• 18 to 25

In the 8088 FLAGS register, which flag is set if the last mathematical or logical instruction produced a zero in its destination?

• Carry Flag (C)
• Parity Flag (P)
• Sign Flag (S)
• Zero Flag (Z)

What is the maximum number of descriptors possible in the Global Descriptor Table (GDT) in protected mode?

• 1024
• 4096
• 8192
• 65536