Mobile Computing

Mobile computing is the interaction between humans and computers, during which a computer allows normal data transmission (video and audio). It is a technical field that includes mobile communication, mobile software, and hardware. Generally, mobile communication engages with infrastructure networks, communication protocols, properties, formats of data, and solid technologies. Mobile hardware includes the device and its components. Mobile software engages with the requirements and features of mobile applications. The major principle of the technology is portability, connectivity, interactivity, and individuality. The most used forms of mobile computing are smart cards, mobile phones, wearable computers, desktops, tablets and beyond.

Multiple-choice questions

1. _______ stores the data related to the user and is relevant to GSM (Global System for Mobile communication) mobile systems as well.

1. 1. SIM (Subscriber Identity Module)
   2. CMR (Customer- Managed Relationship)
   3. VLR (Visitor Location Register)
   4. HMR (Header Manipulation Rule) 

Answer- A 

2. Which type of multiplexing enables to use of the whole bandwidth simultaneously?

1. 1. FDMA
   2. CMDA
   3. TDMA
   4. None of the above

Answer- B

3. On which of the following factor does the shape of the cell depends on the cellular network?

1. 1. Social conditions
   2. Environmental conditions
   3. Political conditions
   4. All of the above

Answer- B

4. Which of the following techniques utilises a similar frequency in the cellular network?

1. 1. Frequency planning
   2. Frequency hopping
   3. Frequency reuse
   4. All of these

Answer- C 

5. Which of the following technology uses wireless communication mode to exchange data or transfer data between several mobiles in the short-range?

1. 1. Bluetooth technology
   2. Ad hoc computing
   3. Mobile computing
   4. None of the mentioned

Answer- A

6. What is the prime vision of the file system?

1. 1. To support access to data without any interruption
   2. To support efficient access to data
   3. To support transparent access to data
   4. All of these 

Answer- D 

7. Which of the following is/are crucial challenges for distributed systems when applied to DFS?

1. 1. Concurrent access to the data
   2. Replication of data
   3. Migration of data
   4. All of the above

Answer- D 

8. The main characteristics of CODA (Constant Data Availability) is/are _________.

1. 1. It has the ability to give great performance through client-side continuous caching
   2. It can provide a disconnected operation for mobile computing
   3. It is available freely under a liberal licence
   4. All of the mentioned

Answer- D

9. What is/are the advantages of applying frequency reuse in mobile computing?

1. 1. The capacity is increased remarkably
   2. A common spectrum can be allocated to the other networks as well
   3. Only a spectrum in a limited amount is needed
   4. All of the mentioned 

Answer- D 

10. By what other term can mobile computing environment be referred to generally?

1. 1. Distributed computing
   2. Grid computing
   3. Both of these
   4. None of these

Answer- A 

11. Which of the following statements is/are not valid for FHSS?

1. 1. It is the abbreviation for Frequency Hopping Spread Spectrum
   2. It utilises the 82 frequency in the 2.4 GHz
   3. It is a narrowband signal
   4. All of the above

Answer- B 

12. In which year was the communication in 2G launched in the market?

1. 1. 1978
   2. 1992
   3. 1988
   4. 1984

Answer- C 

13. Which of the following is/are the main uses of the padding system?

1. 1. In making audio calls
   2. In sending numeric messages
   3. In sending alphanumeric messages
   4. All of the mentioned

Answer- D 

14. For a full-duplex, which of the given statement is valid?

1. 1. The bi-directional communication is possible
   2. The communication is only possible in one direction
   3. The communication is only possible in one direction at a particular time instant
   4. None of the above is valid

Answer- A 

15. _______ is transmitted with the call initiation request during a mobile call.

1. 1. MIN
   2. SCM
   3. ESN
   4. All of the above

Answer- D

16. Which of the following term is associated with the transportation of a mobile station from one base station to the other?

1. 1. Forward channel
   2. MIN
   3. Roamer
   4. Handoff or hand over

Answer- D 

17. What is/are the functions of Personal Communications Networks (PCN)?

1. 1. It gives the ability to make and receive calls
   2. It introduced a wireless concept for calling
   3. It supports generally calls irrespective of the location
   4. All of the above

Answer- D 

18. How is the capacity of the radio enhanced in cellular?

1. 1. By increasing the total base stations and by channel reuse
   2. By increasing the spectrum of the radio
   3. Both of these
   4. None of these

Answer- A

19. Which of the following statements support the fact that the hexagon shape is utilised for the coverage of the radio?

1. 1. The number of cells needed when hexagon shape is used is few.
   2. The shape approximates a pattern of circular radiation
   3. It uses the maximum coverage area
   4. All of the mentioned

Answer- C 

20. Which of the following is/are valid with reference to forwarding voice channels?

1. 1. It connects mobile with PSTN (public switched telephone network)
   2. It is responsible for the transmission of the voice to the mobiles from the base station
   3. It initiates mobile calls
   4. It provides broadcasting of traffic for mobiles

Answer- C 

21. The examples of wireless communications are

1. 1. Mobiles
   2. Zigbee
   3. Wi-Fi
   4. All of the above

Answer- D 

22. Which of the following is the first cellular system developer in the world?

1. 1. NTT (Nippon Telephone and Telegraph)
   2. Qualcomm
   3. Motorola, and Bellcore
   4. None of the mentioned

Answer- A 

23. _______ file system offers the same features that the Andrew File System provides.

1. 1. ROVER
   2. CODA
   3. Both of these
   4. None of these

Answer- A 

24. In mobile computing, HLR is the abbreviation of which the following?

1. 1. Home Live Register
   2. House Live Register
   3. Home Location Register
   4. House Location Register

Answer- C

25. For the purpose of making mobile communication effective, the technique of frequency modulation was invented by ________

1. 1. Nikola Tesla
   2. David Bohm
   3. Albert Einstein
   4. Edwin Armstrong

Answer- D 

26. Which of the following are the limitations of mobile devices?

1. 1. It consumes power very rapidly
   2. The keypad is smaller as compared to the desktop
   3. It is a constant distraction
   4. All of the above

Answer- D

27. Which of the following protocol enables access to the internet from a mobile device?

1. 1. HTTP (Hypertext Transfer Protocol)
   2. WAP (Wireless Application Protocol)
   3. ISD (International Subscriber Dialling)
   4. TCP/IP (Transmission Control Protocol)

Answer- B

28. What does the server provides when the client sends the request in a distributed system?

1. 1. Information
   2. Data
   3. Service
   4. None of the above

Answer- C

29. What is the basic function of the snooping TCP?

1. 1. Flow control
   2. Congestion control
   3. To buffer the data that is in proximity to the mobile host for enabling fast local retransmission if the pocket loss is the case
   4. All of the above 

Answer- C

30. A 4G communication supports the data rates of ________.

1. 1. 200 Mbps
   2. 1024 Mbps
   3. 100 Mbps
   4. 50 mbps 

Answer- B 

31. For the transmission purpose, which of the following code is applied because of its special characteristics?

1. 1. CDMA (Code-Division Multiple Access)
   2. GSM (Global System for Mobile communication)
   3. GPRS (General Packet Radio Service)
   4. None of these 

Answer- A 

32. The packet mode data transfer service is offered by which of the following protocol?

1. 1. TCP (Transmission Control Protocol)
   2. GSM (Global System for Mobile communication)
   3. GPRS (General Packet Radio Service)
   4. None of the mentioned

Answer- C 

33. In which of the following techniques the total bandwidth is divided into the required number of channels of smaller bandwidth along with the guard spaces between the channels?

1. 1. DSSS (Direct sequence spread spectrum)
   2. FHSS (Frequency-hopping spread spectrum)
   3. Both of these
   4. None of these 

Answer- A

34. In which of the following type of handover, does the handover takes place between distinct cells but within the range of similar BSC?

1. 1. Intercell, Intra BSC handover
   2. Inter MSC handover
   3. Intercell, intra MSC handover
   4. Intracell handover

Answer- A 

35. A transfer rate of how much kbit/s is possible in GPRS depending on the code?

1. 1. 190
   2. 125
   3. 110
   4. 170

Answer- D

36. Which of the following service of GSM provides to permit transparent or non-transparent, asynchronous or synchronous transmission of the data?

1. 1. Supplementary services
   2. Bearer services
   3. Teleservices
   4. All of the above

Answer- B

37. Which of the following layer of protocol architecture all the radio-related functions for signalling?

1. 1. The layer 2 or LAPD (Link Access Protocol Balanced)
   2. The layer 1 or physical layer
   3. Mobility management layer
   4. Call management layer

Answer- B

38. For the purpose of encapsulating all packets destined for the UE, which tunnelling protocol is used?

1. 1. UMTS tunnelling protocol (Universal Mobile Telecommunications System)
   2. GPRS tunnelling protocol (General Packet Radio Service)
   3. RNS tunnelling protocol (Radio Network Subsystem)
   4. PDCP tunnelling protocol (Packet Data Convergence Protocol)

Answer- B