Serial Communication Unit Questions

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1.

The serial communication is

A

cheaper communication

B

requires less number of conductors

C

slow process of communication

D

all of the mentioned

Correct Answer: D

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2.

The serial communication is used for

A

short distance communication

B

long distance communication

C

short and long distance communication

D

communication for a certain range of distance

Correct Answer: B

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3.

The mcs 51 architecture supports

A

serial transmission and reception

B

simultaneous transmission and reception

C

transmission and reception of data using serial communication interface

D

all of the mentioned

Correct Answer: D

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4.

The number of bits transmitted or received per second is defined as

A

transmission rate

B

reception rate

C

transceiver rate

D

baud rate

Correct Answer: D

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5.

The task of converting the byte into serial form and transmitting it bit by bit along with start, stop and parity bits is carried out by

A

reception unit

B

serial communication unit

C

transmission unit

D

all of the mentioned

Correct Answer: C

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6.

The transmission unit does not require assistance from processor if once a byte for transmission is written to

A

SCON register

B

SBUF register

C

SFR address

D

Any of the mentioned

Correct Answer: B

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7.

The common unit shared by the receiver unit and transmission unit of serial communication unit is

A

SCON(Serial Port Control) Register

B

SBUF(Serial Buffer) register

C

8-bit serial data interface

D

All of the mentioned

Correct Answer: D

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8.

During serial reception, the buffer that receives serial bits and converts to a byte is

A

receive buffer 0

B

receive buffer 1

C

receive buffer 2

D

none

Correct Answer: B

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9.

If SM0=1, SM1=0, then the transceiver selected is

A

8-bit synchronous

B

9-bit synchronous

C

8-bit asynchronous

D

9-bit asynchronous

Correct Answer: D

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10.

If the microcontroller is expected to communicate in a multiprocessor system, then the required condition is

A

SM0 is set

B

SM1 is set

C

SM2 is set

D

REN is set

Correct Answer: C

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