Exam Practice

Question 1

CD players utilise an infrared laser to read the data on the disk.

Answer 1

True

Question 2

The inverted commas Type in the following specification indicates “usable bandwidth”
Frequency Response: 0.35Hz – 200Khz ‘+0/-3.0dB’.

Answer 2

False

Question 3

Thunderbolt combines USB and DisplayPort technology into one serial signal.

Answer 3

True. DisplayPort and PCI Express and USB.

Question 4

A microphone designed for bass drum recording would not need to have a flat
frequency response.

Answer 4

True

Question 5

The bandwidth of a critical band increases as frequency increases.

Answer 5

True.

Question 6

USB 2.0 transmits data at 480Mb per second.

Answer 6

True.

Question 7

Signal to noise ratio is the difference in dB between the maximum acceptable signal and any system noise that is present

Answer 7

True.

Question 8

Blu-ray stores 25Gb of data per layer.

Answer 8

True.

Question 9

CD quality audio is sampled at 44.1 KHz.

Answer 9

true.

Question 10

Flash drives utilize flash memory in combination with a USB interface.

Answer 10

True

Question 11

A data multiplexer is used to add error protection to a digital audio signal.

Answer 11

False.

Question 12

CD-RW is a write once, read many CD format

Answer 12

False.

Question 13

PCM stands for Pulse Code Modulation

Answer 13

True.

Question 14

MADI is a multichannel digital audio transmission system.

Answer 14

True.

Question 15

The cyclic redundancy check code adds 1 bit of redundant data to each binary
word in order to detect errors

Answer 15

False

Question 16

Data Compression is a lossy process used to reduce the files size or data transmission rate of an audio file. Some data is permanently removed through
this process.

Answer 16

False.

Question 17

Digital Audio Signals are continuous in nature. They change from moment to moment but do so smoothly and without breaks or gaps.

Answer 17

False

Question 18

Quantisation can be defined as the process of measuring the value of each
sample and assigning a code word to express this value.

Answer 18

True.

Question 19

Sampling can be defined as the process of measuring a waveform as it passes
by at a set rate per second.

Answer 19

True.