10 interview questions and answers on NB-Fi

Here’s a list of questions and answers about the NB-Fi. This guide can help you prepare for job interviews for NB-Fi skill requirements.

List of 10 NB-Fi Questions and Answers

Question 1: What is the NB-Fi protocol?

Answer 1: NB-Fi is a narrowband communication protocol designed by WAVIoT for long range, low power IoT applications. It uses the license free ISM band.

Question 2: What frequency band does NB-Fi operate in?

Answer 2: It operates in the sub-GHz ISM band (430 to 500 MHz), allowing deep indoor penetration and extended range.

Question 3: How does NB-Fi differ from NB-IoT?

Answer 3: NB-Fi is a proprietary protocol, while NB-IoT is standardized by 3GPP. NB-Fi offers simpler deployment with lower costs.

Question 4: What are the key advantages of NB-Fi?

Answer 4: It supports long range communication (up to 10 km urban), low power consumption and simple infrastructure.

Question 5: Which modulation scheme does NB-Fi use?

Answer 5: NB-Fi typically uses DBPSK or DQPSK modulation, enabling robust communication over narrow bandwidths.

Question 6: What is the data rate of NB-Fi?

Answer 6: The protocol supports up to 25 kbps, sufficient for most sensor based applications.

Question 7: How is security handled in NB-Fi?

Answer 7: It uses AES-128 encryption to ensure end to end data protection.

Question 8: What is the battery life of NB-Fi-enabled devices?

Answer 8: Due to its low power nature, devices can operate for up to 10 years on a single battery.

Question 9: What are typical NB-Fi applications?

Answer 9: Smart metering, asset tracking, smart city sensors and agriculture monitoring.

Question 10: Does NB-Fi require cellular infrastructure?

Answer 10: No, it uses its own base stations and does not depend on other cellular networks, making it ideal for private deployments.