# Audio Engineering MCQ Questions and Answers – Binary and Digital

This set of Audio Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Binary and Digital”.

1. What is known as each digit in binary?
a) Bit
b) Byte
d) Mega

Explanation: The binary system is the simplest numbering scheme as there are only two digits or symbols 0 and 1. Each digit is known as bit. One bit is called datum and many bits are called data. Logically, in binary system there are only two states: either true or false.

2. A high voltage represents a binary 1.
a) True
b) False

Explanation: As there are only two States to identify, binary systems have the greatest resistance to such effects. A high voltage representing a true state or binary 1 and a low voltage representing a false logic state or binary 0.

3. Which information is compared with the threshold level in a binary system?
a) Digital
b) Video
c) Audio
d) Binary

Explanation: The binary information is compared with threshold level. It is set halfway between the ideal levels. If any output voltage is above the threshold voltage is considered a 1 and any voltage below is considered a 0. This process is called slicing.

4. What is the main advantage of binary signal?
a) We can store large data
b) We can store less data
c) We cannot store data
d) High gain

Explanation: The main advantage of binary signals is that bits can be packed more densely means we can store large data on to storage media, which results in increase of the performance and reducing the cost.

5. A combination of how many bits in a binary number is commonly called a word?
a) 32
b) 64
c) 16
d) 8

Explanation: A combination of 16 bit in binary number is commonly called as a word, and the number of bits in the given word is called the word length. The rightmost bit is considered as least significant bit (LSB), whereas leftmost bit is considered as most significant bit (MSB).
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6. Which bit is used for signed numbers in binary signal?
a) MSB
b) LSB
c) PCM
d) ACD

Explanation: The MSB bit it is used for signed numbers. In all cases, the possible range of a word is limited by the word length. Thus a 4 bit word has 16 combinations and could address memory having 16 locations. A 16 bit word has 65,536 combinations.

7. What is equal to 1024 bytes?
a) 10K
b) 3K
c) 5K
d) 1K

Explanation: The capacity of memory is and storage media is measured in bytes, but to avoid large numbers, kilobytes, megabytes and gigabytes are often used. A 10 bit word has 1024 combination, which is close to 1000. In digital terminology, 1K is defined as 1024, so kilobytes of memory contain 1024 bytes.

8. In which audio systems, the sound is first converted into analog electrical signals using a microphone as a transducer?
a) Digital
b) Analog
c) Binary
d) Passive

Explanation: In digital audio systems, the sound is first converted into analog electrical signals using the microphone as a transducer. Then those analog signals are converted into digital signal using analog to digital converter. Then that data can be used to record, store, generate, manipulate and reproduce sound.

9. Binary data can be copied as many times as one wants without any loss of data.
a) True
b) False

Explanation: The above statement is false. Digital audio system is widely used and accepted everywhere around the world because of its many benefits over analog system. Digital data can be copied as many times as one wants without any loss of data or any distortion or effects on quality.

10. What numbers is digital information made of?
a) Discrete
b) Continuous
c) Binary
d) Prime

Explanation: Digital information is made of discrete numbers. When they are packed densely on a medium, however some error occurs because of noise or dropout. But original value can be restored by error correction. Compared to analog systems, digital systems are less expensive and easy to use.

11. What type of errors can be eliminated for stereo images in digital systems?
a) Gross
b) Limiting
c) Timing
d) Random

Explanation: Timing errors between channels can be eliminated for accurate stereo images. When a digital recording is copied, the same number appears on copy i.e. it is a duplicate and is undistinguishable. If the copy is undistinguishable from the original there is no generation loss.

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