BlueTooth Interview Questions and Answers
Question - 21 : - Name few applications of Bluetooth?
Answer - 21 : -
- Wireless control of and communication between a cell phone and a hands free headset or car kit. This is the most popular use.
- Wireless networking between PCs in a confined space and where little bandwidth is required.
- Wireless communications with PC input devices such as mouses and keyboards and output devices such as printers.
- Transfer of files between devices via OBEX.
- Transfer of contact details, calendar appointments, and reminders between devices via OBEX.
- Replacement of traditional wired serial communications in test equipment, GPS receivers and medical equipment.
- For remote controls where infrared was traditionally used.
- Sending small advertisements from Bluetooth enabled advertising hoardings to other, discoverable, Bluetooth devices.
- Wireless control of a games console, Nintendo’s Wii and Sony’s PlayStation 3 will both use Bluetooth technology for their wireless controllers.
- Sending commands and software to the upcoming LEGO Mindstorms NXT instead of infra red.
Question - 22 : - Why can Bluetooth equipment integrate easily in TCP/IP network?
Answer - 22 : - Because Bluetooth uses wireless LAN standards IEEE for data transmission.
Question - 23 : - Is it possible to connect multiple Bluetooth hubs?
Answer - 23 : - No, only one hub can be used at a time with a computer. USB or Serial devices can be added.
Question - 24 : - What are Different Classes in Bluetooth?
Answer - 24 : -
Bluetooth is a radio standard and communications protocol primarily designed for low power consumption, with a short range (power class dependent: 1 meter, 10 meters, 100 meters) based around low-cost transceiver microchip in each device.
Bluetooth lets these devices communicate with each other when they are in range. The devices use a radio communications system, so they do not have to be in line of sight of each other, and can even be in other rooms, so long as the received power is high enough.
Question - 25 : - What is FCC and how does it relate to Bluetooth?
Answer - 25 : - FCC is Federal Communication Commission, which issues licenses to the stations for specific frequencies. It also decides who is able to use which frequency for what purpose. Since Bluetooth is using unlicensed spectrum, FCC has no direct involvement with Bluetooth
Question - 26 : - What are some of the uses of Bluetooth?
Answer - 26 : - Depending on the Bluetooth profiles included on the device, Bluetooth technology has the capability to wirelessly synchronize and transfer data among devices. The Bluetooth audio capabilities can be used for headset and hands free applications. The exact functionality provided by a Bluetooth enabled device depends on the Bluetooth profiles included.
Question - 27 : - How does Bluetooth fit in with WiFi?
Answer - 27 : - The 802.11b (WiFi) standard is commonly used for wireless networking. Bluetooth is not a competitor with 802.11b, but rather a complement to it. While 802.11b is generally a replacement for wired local area networking, Bluetooth is more commonly used as a replacement for cables between individual devices. Bluetooth is designed to link devices within a very short range (up to 33 feet ). Bluetooth is part of the 802.15 standard.
Question - 28 : - Under what frequency range does Bluetooth work?
Answer - 28 : - 2.45 GHz is the frequency range.
Question - 29 : - Which Bluetooth version uses adaptive frequency hopping? Why?
Answer - 29 : - In Version 1.2 Adaptive frequency hopping method is used, which improves resistance to radio interference, and provides higher transmission speed.
Question - 30 : - What are the other (competing or not) wireless technologies?
Answer - 30 : - Wi-Fi, IrDa, EDGE, UWB (Ultra Wide Band)