What is the difference between Bluetooth and Wi-Fi?
Compares two wireless technologies based on range, speed, power consumption, and use cases.
Why Interviewers Ask This
Both are ubiquitous wireless standards. Interviewers check if you understand their distinct niches, such as personal area networks versus local area networks.
How to Answer This Question
Compare range, bandwidth, power usage, and typical applications. Highlight Bluetooth for short-range, low-power devices and Wi-Fi for high-speed internet access. Mention frequency bands and connection topologies like piconets vs infrastructure mode.
Key Points to Cover
- Range comparison
- Bandwidth differences
- Power consumption
- Use case scenarios
Sample Answer
Bluetooth is designed for short-range, low-power communication between personal devices like headphones and phones. Wi-Fi offers higher data rates and longer range, suitable for connecting to the internet or local networks. While Bluetooth consumes less power, Wi-Fi provides the bandwidth needed for streaming and large file transfers.
Common Mistakes to Avoid
- Confusing frequencies
- Ignoring power efficiency
- Overlooking security differences
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