UART & TIMERS Interview Question and Answers

Q. UART Protocol was Designed by_________________.

• Intel
• ARM
• ATMEL
• GORDON BELL
• BORERT BOSCH

ANS-> GORDON BELL

Q. 8051 has two_________bits timers/counters

• 8 bits
• 16 bits
• 32 bits
• non

ANS-> 16 bits

Q. For 2ms delay. what should be the value of TH0 & TL0? Assuse that XTAL is 12 MHZ.

• 0xFC18
• 0xFC1A
• 0xF832 
• 0xF830

ANS-> 0xF830

Q. What is the baud rate?

• Numbers of bits transmitted per second
• Speed of communication
• Frequency
• all above

ANS-> Numbers of bits transmitted per second

Q. The UART is________________protocol.

• Full-duplex
• half-duplex
• Full-duplex, asynchronous serial communication
• Half-duplex, asynchronous serial communication
• Full-duplex, asynchronous & synchronous serial communication
• Half-duplex, asynchronous & synchronous serial communication

ANS-> Full-duplex, asynchronous serial communication

Q. The maximum speed of the UART protocol is____________-.

• 9600bps
• 56800pbs.
• 1Mbps
• 5Mbps

ANS-> 5Mbps

Q. The UART is____________wired communication protocol.

• 1-Wired
• 2-Wired
• 3-Wired
• 4-Wired

ANS-> 2-Wired Communication

Q. The UART data-tarnsfer direction is from__________.

• MSB to LSB
• LSB to MSB
• None
• All above

ANS-> LSB to MSB

Q. In the 8051, one tick of timer is equal to_________--.

• 1 clock cycle
• 1 machine cycle
• 5 state
• None of above 

ANS-> 1 machine cycle

 

Further Reading:

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