Data, Files, and Digital Information: Digital vs Analog and Real-World Applications

Engineering

Knowledge check on digital representation of real-world information

10 XP
Reward
10
Questions
5–10 min
Time
Q1 Question 1 of 10

Analog signals (like sound waves) are continuous. How do computers capture analog audio and convert it to digital?

Q2 Question 2 of 10

Why is digital data generally more reliable for storage and transmission than analog data?

Q3 Question 3 of 10

A music streaming service claims to offer 'lossless' audio. What does this mean for the listener?

Q4 Question 4 of 10

What is a 'checksum' and how is it used to verify file integrity?

Q5 Question 5 of 10

Why does converting a photo from JPEG to PNG and back to JPEG result in lower quality than the original JPEG?

Q6 Question 6 of 10

What information can be found in the EXIF metadata of a photo taken with a smartphone?

Q7 Question 7 of 10

A city installs 1,000 traffic sensors collecting data every second. Each reading is 50 bytes. How much data do they collect per day?

Q8 Question 8 of 10

What is 'open data' and why do some governments and organizations publish it?

Q9 Question 9 of 10

What is 'big data' and what makes it different from regular data?

Q10 Question 10 of 10

When you use an incognito/private browsing window, which of these does it actually prevent?