Asynchronous Flow Control

Embedded System

This set of Embedded Systems Multiple Choice Questions & Answers (MCQs) focuses on “Asynchronous Flow Control”.

1. Which can prevent the terminal of data transmission?
a) flow control
b) increasing flow
c) increasing count
d) terminal count

2. Which of the following is the first flow control method?
a) software handshaking
b) hardware handshaking
c) UART
d) SPI

3. Which one of the following is the second method for flow controlling?
a) hardware
b) peripheral
c) software
d) memory

4. Which can restart the data transmission?
a) XON
b) XOFF
c) XRST
d) restart button

5. Which of the following is a common connector?
a) UART
b) SPI
c) I2C
d) DB-25

6. What does pin 22 in DB-25 indicate?
a) transmit data
b) receive data
c) ring indicator
d) signal ground

7. Which pin indicates the DSR in DB-25?
a) 1
b) 2
c) 4
d) 6

8. Which of the following connections are one to one?
a) Modem cables
b) SPI
c) UART
d) I2C

9. Which of the following are used to link PCs?
a) modem cable
b) null modem cable
c) serial port
d) parallel port

10. Which of the following method is used by Apple Macintosh?
a) hardware handshaking
b) software handshaking
c) no handshaking
d) null modem cable

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