Serial port programming

Lecture 38: Serial port programming

90 Questions65 MCQs22 Short Questions3 Long Questions

Showing 21 – 30 of 90 Questions

Page 3 of 9

Q21❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield

On a standard 9-pin DB-9 serial communications connector, which pin number is assigned to the Data Carrier Detect (CD / DCD) signal line?

Q22❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield

What is the standard name for the 9-pin serial communications connector used on PCs?

Q23❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield

On a standard 9-pin RS-232 (DB-9) serial port connector, which pin number is assigned to the Receive Data (RD / RXD) line?

Q24❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield

On a standard 9-pin RS-232 (DB-9) serial port connector, which pin number is assigned to the Data Terminal Ready (DTR) signal?

Q25❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield

On a standard 9-pin RS-232 (DB-9) serial port connector, which pin number is assigned to the Data Set Ready (DSR) signal?

Q26❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield💡Conceptual

Which BIOS software interrupt provides serial port communication services (COM1–COM4) in assembly language?

💻 assembly Snippet

mov ah, 0x01
mov al, 'A'
mov dx, 0
int 0x14

Q27❓ MCQ📑 Lec 14Easy🔁Repeated⭐High-Yield

On a standard 9-pin RS-232 (DB-9) serial port connector, which pin number is assigned to the Ring Indicator (RI) signal line?

Q28📝 Short Q📑 Lec 14Easy🔁Repeated⭐High-Yield💡Conceptual

In BIOS INT 14h Service 02h (Read Character from Serial Port), which 8-bit register returns the received ASCII character?

💻 assembly Snippet

mov ah, 0x02
mov dx, 0
int 0x14

Q29📝 Short Q📑 Lec 14Medium🔁Repeated⭐High-Yield💡Conceptual

Define 'Baud Rate' in serial communication and explain the purpose and function of the Parity Bit.

Q30🧠 Long Problem📑 Lec 14Medium🔁Repeated⭐High-Yield

Describe the names and functions of any five pins on a standard 9-pin DB-9 RS-232 serial communication connector.