RS 232 protocols - MCQs with answer

RS 232 protocols - MCQs with answer

1. Which lines are utilized during the enable state of hardware flow control in DTE and DCE devices of RS232 ?

a. CD & IR
b. DSR & DTR
c. RTS & CTS
d. None of the above

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2. Which among the below stated lines represent the handshaking variant usually and only controlled by the software in the handshaking process?

a. XON/ XOFF
b. DCD & GND
c. TxD & RxD
d. All of the above

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3. Match the following registers with their functions :

A. Line Status Register ------------------ 1. Set Up the communication parameters
B. Line Control Register ----------------- 2. Sharing of similar addresses
C. Transmit & Receive Buffers ------------ 3. Status Determination of Tx & Rr

a. A-2, B-1, C-3
b. A-1, B-2, C-3
c. A-3,B-1, C-2
d. A-3, B-2, C-1

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