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UART Mcq unit 1
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1. How many wires does UART use?
One
two
Three
four
2. The UART frame consists of ___________ bits
Data
Start/stop
Parity
All the above
3. Which bit is used for error detection?
Data
Start/stop
Parity
All of the above
4. In which parity the number of 1’s must be even?
Even
Odd
Both A & B
none of the above
5. ___________ are the UART registers
Control and status
Receive
Transmit
All of the above
6. Which one of the following registers contains settings for the UART?
Control
Receive
Transmit
All of the above
7. Which one of the following registers contains information about the UART state or condition?
Control
Receive
Transmit
Status
8. The universal asynchronous receiver transmitter can be _____________
Simplex
Full-duplex
Half-duplex
All of the above
9. In which parity the number of 1’s must be odd?
even
odd
Both A & B
none
10. The number of bits sent every second is known as ________ rate
Bit
Byte
Baud
none of the above
11. The number of symbols sent every second is known as ________ rate
Bit
Byte
Baud
None of the above
12. Which one is a type of UART flag?
TDRE
RSR
RDR
None of the above
13. Which one is a type of UART register?
TDRE
RSR
SCSR
none of the above
14. What is the standard form of TDRE?
Transmit Data Register Empty
Transmit Data Rate Empty
Transmit Data Register Enable
None of the above
15. ___________ is an example for data communication equipment
Modem
Computer
Terminal
none of the above
16. What is the standard form of DTE?
Data Transfer Equipment
Data Terminal Equipment
Data Transmit Equipment
none of the above
17. What is the standard form of RDRF?
Receiver Data Register Full
Receiver Data Rate Full
Register Data Receiver Full
none of the above
18. ____________ is an example for data terminal equipment
Terminal
Computer
Both A & B
none of the above
19. What is the standard form of DCE?
Data Communication Equipment
Data Common Equipment
Data Control Unit Equipment
none of the above
20. What are the advantages of UART?
Uses only two wires
Widely used method
Clock signal is not necessary
All of the above
21. What is the standard form of RDR?
Receiver Data Register
Register Data Receiver
Register Data Receiver
Receiver Shift Register
22. What are the disadvantages of UART?
Doesn’t support multiple slave
Data frame size is limited to a 9 bits max
Both a and b
None of the above
23. What is the function of the UARTn_TXD signal?
Serial data transmit-receive
Clear to send handshaking signal
Both a and b
None of the above
24. The transmitter section of an UART consists of __________
Transmitter shift register
Transmitter hold register
Both a and b
None of the above
25. What is the standard form of RSR?
Receiver Data Register
Register Shift Receiver
Receive Shift Register
None of the above
26. What is the standard form of RSR?
Receiver Data Register
Register Shift Receiver
Receive Shift Register
none of the above
27. What is the function of UARTn_RTX?
Serial data receive
Clear to send handshaking signal
Both a and b
none of the above
28. Which one of the following was used to enable or disable the interrupt request?
IER
IIR
Both A & B
All of the above
29. Which one of the following is a write-only register?
FIFO control register
Interrupt identification register
Both a and b
None of the above
30. What is the standard form of TDR?
Transport Data Register
Transmit Data Register
Transmit Data Receiver
None of the above
31. Which one of the following is a divisor latch?
DLH
DLL
Both A & B
None of the above
32. The baud rate of 8-bit UART is ___________ 1200bps
1500bps
1500bps
9600bps
None of the above
33. In 8-bit UART 1 byte is equal to ____________ bits
Two
Four
Eight
Sixteen
34. The bits transferred per second is _______ in 8-bit UART
1,000
5,098
8,192
6,789
35. The data in a UART is detected by __________
Counter
Clock
Both A & B
None of these
36. What is the standard form of TSR?
Transmit Shift Register
Transport Status Register
Transmit Status Receiver
None of the above
37. The baud rate of 16 bit UART is ___________
1200bps
1500bps
9600bps
None of the above
38. In 16-bit UART 1 byte is equal to ____________ bits
2
4
8
16
39. The bits transferred per second is ______ in 16 bit UART
12,898
15,089
96,230
16,384
40. Which register does UART contain?
Clock
Shift
Both A & B
none of the above
41. What is the standard form of SCCR?
Serial Communication Control Register
Serial Communication Common Register
Serial Communication Register
none of the above
42. _______ are the handshaking signals
RI, DCD, CTS
DSR, RTS
DTR
All of the above
43. The MSP430 family operates in _________ mode
Synchronous
Asynchronous
Both a and b
none of the above
44. What is the standard form of SCSR?
Serial Communication Serial Register
Serial Communication Status Register
Serial Communication Register
None of the above
45. The speed of the UART is ________ compare to USART
Less
High
Very high
none of the above
46. Which one of the following uses data signal for its functioning?
UART
USART
Both a and b
None
47. In which one of the following the data is transmitted in the form of bytes?
UART
USART
Both A & B
None of the above
48. What is the standard form of UDR?
UART Data Register
USART Data Register
USART Control Register
none of the above
49. Which one of the following is an SPI register? All of the above
SPDR
SPCR
SPSR
All of the above
50. The transmitter type of LIN is ____________
Synchronous
Asynchronous
Both a and b
None of the above
51. The data rate of a UART is __________
10Kbps
20Kbps
40Kbps
50Kbps
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