Class 9 Computer Science · Chapter 2 · Test 2
Additional MCQs
30 MCQs
25 questions · 25 min · 25 marks
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Sample questions
The first 5 of 25. Try each one, then tap to see the answer.
Question 1
What does a signal represent?
- AInformation
- BEnergy
- CFrequency
- DPower
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Answer: A
A signal represents information that can be transmitted or processed.
Question 2
Which type of signal uses 0s and 1s?
- AAnalog signal
- BElectromagnetic signal
- CDigital signal
- DRadio signal
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Answer: C
Digital signals use 0s and 1s to represent information.
Question 3
Which device converts analog signals into digital signals?
- ADAC
- BADC
- CMicrophone
- DCDC
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Answer: B
An Analog-to-Digital Converter (ADC) converts analog signals into digital signals.
Question 4
Which component acts as an ADC in a computer?
- AMicrophone
- BSound card
- CSpeaker
- DCPU
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Answer: B
A sound card can act as an ADC by converting analog audio signals into digital data.
Question 5
The AND operator of Boolean algebra is denoted by:
- A. (dot)
- B+
- CBar over the variable
- D*
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Answer: A
The AND operator of Boolean algebra is denoted by a dot (.).
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