Computer Architecture & Assembly Language MCQs with Answers
Practice important Computer Architecture & Assembly Language MCQs with answers and explanations.
Multiple Choice Questions
Q311: What is stored at the start of the device driver file?
- A: BPB
- B: Header
- C: FAT
- D: Data sector
View Answer
B
Q312: How does a DOS device driver differentiate between character and block devices?
- A: Using bit 15 in the device attribute word
- B: Using the FAT
- C: Using the BPB
- D: Using the file system interface
View Answer
A
Q313: What does the instruction int 0x21, ah=4B do in the multitasking TSR caller program?
- A: Load and execute a program
- B: Resize memory
- C: Allocate memory
- D: Free memory
View Answer
A
Q314: What is the main difference between serial and parallel port communication?
- A: Bits are sent one by one
- B: Bytes are sent one by one
- C: Bytes are sent in parallel
- D: Bits are sent in parallel
View Answer
A
Q315: What type of connector is used for a serial port?
- A: DB-25
- B: DB-9
- C: RJ-45
- D: USB
View Answer
B
Q316: How many wires are sufficient for full duplex serial communication?
- A: One
- B: Two
- C: Three
- D: Four
View Answer
C
Q317: What is the standard format used for serial port communication?
- A: RS422
- B: RS485
- C: RS232
- D: USB
View Answer
C
Q318: What is the purpose of the start bit in RS232 communication?
- A: End data transmission
- B: Indicate an error
- C: Start data transmission
- D: Parity check
View Answer
C
Q319: How many data bits can be used in RS232 communication?
- A: 4 to 7
- B: 5 to 8
- C: 7 to 9
- D: 6 to 9
View Answer
B
Q320: What BIOS service initializes the serial port?
- A: INT 14 - AH = 01h
- B: INT 14 - AH = 02h
- C: INT 14 - AH = 03h
- D: INT 14 - AH = 00h
View Answer
D