Книга: Introduction to Microprocessors and Microcontrollers

Quiz time 17

In each case, choose the best option.

1 The fastest design of analogue to digital conversion is a:

(a) ramp converter.

(b) flash converter.

(c) comparator.

(d) successive approximation converter.

2 Quantization error can be reduced by:

(a) increasing the number of levels in the ADC.

(b) increasing the speed of the conversion.

(c) using vectored interrupts rather than polling.

(d) using a flash converter.

3 Using the RS232C standard, a binary 0 is most likely to be transmitted as:

(a) –4 V.

(b) +2 V.

(c) –5 V.

(d) +10 V.

4 A modem is:

(a) a type of USART.

(b) normally connected between the UART and the RS232C converter.

(c) only used in fibre optic systems.

(d) used to convert digital signals into audio tones for transmission over telephone cables.

5 This received transmission has sixteen bits of data and includes an error. It is using odd parity on the ones in a block of 25 bits:

0000111010111000100110011.

The corrected data is:

(a) 1000111010111000101110011.

(b) 0000111010111000101110010.

(c) 0000111010111000101110011.

(d) 0000111010111000100110011.

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