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Bluetooth Interview Questions & Answers - Learning Mode

Bluetooth Interview Questions & Answers - Learning Mode

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). A Bluetooth device uses radio waves instead of wires or cables to connect to a phone or computer. A Bluetooth product, like a headset or watch, contains a tiny computer chip with a Bluetooth radio and software that makes it easy to connect. When two Bluetooth devices want to talk to each other, they need to pair.

Try Bluetooth Interview Questions & Answers - Exam Mode

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Bluetooth Interview Questions & Answers - Learning Mode
Try Bluetooth Interview Questions & Answers - Exam Mode
Question: What is RJ-45 and full name of RJ-45?

Answer: RJ45 (Registered Jack 45) is a physical interface often used for terminating twisted pair type cables. "RJ" stands for Registered pack which is part of theUnited states Code of Federal Regulations. It has eight "pins" or electrical connections per connector.

It is frequently terminated using the T568A or T568B pin/pair assignments that are defined in TIA/EIA-568-B:
Question: Describe TCP flow control

Answer: The receiver will have buffers in order to collect the frames sent by sender. the buffer should not get over loaded. if the buffer becomes full, the receiver sends a stop signal to sender. the sender then stops transmitting data. after the receiver processes all data in buffer, it sends a go signal to the sender. then, the sender starts its transmission. it is flow control in tcp.
Question: Why is Bluetooth called a cable replacement technology?

Answer: Bluetooth technology allows the creation of Personal Area Networks without cables or wires that are usual in home networks. Source:
Question: What is Piconet?

Answer: A collection of devices connected through Bluetooth technology in an ad hoc fashion. Source:
Question: How does traceroute work

Answer: traceroute is used to find the quality of internet connection.

the cmd is used as: tracert

depending on the ms values displayed after the processing of the cmd, the latency is found and the quality is determined.
Question: What is IP Spoofing? What do hackers do with it

Answer: Ip spoofing is a technique used to gain unauthorized access to computers, whereby the intruder sends messages to a computer with an IP address indicating that the message is coming from a trusted host. To engage in IP spoofing, a hacker must first use a variety of techniques to find an IP address of a trusted host and then modify the packet headers so that it appears that the packets are coming from that host. Source:
Question: How can you keep a TCP connection from tearing down when no data will be sent for a long time?

Answer: What ever type of connection it is TCP cannot go tearing unless and untill the connection type is cut i.e if the connection type is dialup and you hung it up / if it is Ethernet port and you remove the rj 45 chord. No matter what time you send / do not send the data.
Question: What are the other (competing or not) wireless technologies?

Answer: Wi-Fi, IrDa, EDGE, UWB (Ultra Wide Band) Source:
Question: What is ICMP, ARP, Multicast, Broadcast

Answer: ICMP:internet control message protocol

for PING command dis ICMP packets will come


To see the properties of TCP/IP protocol, means like if v want to know odar ssystem MAC address it ll b use ful

in dis (arp -a) and (arp -s) commands r der


class D is useful 4 multi casting

Broad casting

if all HID portion bits ones dat s broadcasting
Question: What are the different applications of bluetooth?

Answer: Bluetooth applications are cellphones to transfer data between two mobiles.Using bluetooth device connection can be possible with internet to computer using cellphones. Source:
Question: Difference between TCP and UDP

Answer: TCP-Transmission Control Protocol.
Protocol responsible for control over Transmission of data over the network.
It breaks the data into packets.
It supports error correction.

UDP-User Datagram Protocol
It also breaks the data into packets like the TCP.
But it does not support error correction. Source:
Question: Which technology is used in Bluetooth for avoiding interference?

Answer: Frequency hopping is the technology used in Bluetooth. Source:
Question: Explain TCP connection establishment and tear down

Answer: Tcp connection is made as follows:

1) sender and receiver synchronizes so that a connection is made. The OS in both the end are informed that a conenction is established.

2) then sender starts transmitting data. it also gets acknowledgements. a timer is started as soon as the sender starts sending data.

3) if the sender has not received any ack even after the timer exceeds it limit, then it retransmits data.

4) in case of windowing,if the buffer on the recei Source:
Question: What is FCC and how does it relate to Bluetooth?

Answer: 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 Source:
Question: What companies are involved in the Bluetooth initiative?

Answer: Global technology leaders Ericsson, Nokia, IBM, Intel and Toshiba founded the Bluetooth SIG in 1998. These companies are now supported by over 1,000 other organizations with a wide range of expertise, including Widcomm, Inc. Source:
Question: What are the different types of routing possible at layer 3

Answer: static routing and dynamic routing

Question: How is Bluetooth used?

Answer: Bluetooth can be used to wirelessly synchronize and transfer data among devices. Bluetooth can be thought of as a cable replacement technology. Typical uses include automatically synchronizing contact and calendar information among desktop, notebook and palmtop computers without connecting cables. Bluetooth can also be used to access a network or the Internet with a notebook computer by connecting wirelessly to a cellular phone. Source:
Question: What is Service Discovery Protocol?

Answer: Discovery services are crucial part of the Bluetooth framework. These services provide the basis for all the usage models. Using SDP, device information, services and the characteristics of the services can be queried and after that, a connection between two or more Bluetooth devices can be established. SDP is defined in the Service Discovery Protocol specification. Source:
Question: What types of routing are possible in a wireless network

Answer: Static routingdyanmic routing(rip, igrp,eigrp and ospf) Source:
Question: What is the data throughput speed of a Bluetooth connection?

Answer: Bluetooth transfers data at a rate of 721 Kbps, which is from three to eight times the average speed of parallel and serial ports, respectively. This bandwidth is capable of transmitting voice, data, video and still images Source:

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Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
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