1.1 Analogue and Digital Data

Quiz
•
English
•
8th Grade
•
Medium
F BINYUSOFF
Used 10+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What type of data can have any value within a range, like a dimmer switch?
A) Digital
B) Analogue
C) Binary
D) Sampling
Answer explanation
Analogue data can take any value within a range, similar to how a dimmer switch adjusts brightness smoothly. In contrast, digital data is discrete, binary data has only two states, and sampling refers to capturing data at intervals.
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following best describes digital data?
A) It can be in an in-between state
B) It only has two states: on and off
C) It changes smoothly like sound waves
D) It is very difficult to store and process
Answer explanation
Digital data is characterized by having only two states: on and off, which corresponds to binary code (0s and 1s). This makes option B the best description, while other options incorrectly suggest more complex states.
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the main purpose of a transistor in a CPU?
A) To create sound
B) To store data
C) To act as a switch
D) To capture sound waves
Answer explanation
The main purpose of a transistor in a CPU is to act as a switch. It controls the flow of electrical signals, enabling the CPU to perform calculations and process data efficiently.
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is sampling?
A) Converting analogue data into sound
B) Taking regular pieces of signal and converting them into a digital form
C) Making the sound clearer
D) Changing digital data into analogue
Answer explanation
Sampling refers to taking regular pieces of a signal to convert it into a digital format. This process is essential in digital audio and video, making option B the correct choice.
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
In a binary system, the digit 1 represents:
A) Off
B) On
C) Neither
D) Both
Answer explanation
In a binary system, the digit 1 represents 'On', indicating an active or true state, while 0 represents 'Off', indicating an inactive or false state. Therefore, the correct answer is B) On.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The more samples taken per second, the:
A) Clearer the sound recording
B) Faster the processing
C) Higher the frequency
D) Lower the volume
Answer explanation
The more samples taken per second, the clearer the sound recording becomes. Higher sampling rates capture more detail in the audio, resulting in better sound quality.
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What device changes digital data back to analogue so it can be heard through speakers?
Transistor B) DAC (Digital-to-Analogue Converter) C) CPU D) Binary System
DAC (Digital-to-Analogue Converter)
CPU
Binary System
Answer explanation
DAC (Digital-to-Analogue Converter), which converts digital data into analogue signals, allowing the sound to be played through speakers. Other options do not perform this function.
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