.gif)
Mobile computing Technical questions
1. Which communication system is called as two way communication?
i] simplex ii] half duplex iii] full duplex
A] i B] ii C] iii D] ii & iii
2. which radio channel used for control purposes in telephone transmission?
A] control channel B] forward channel C] both A & B D] None
3. A mobile station which operates in service area other than that from which service has been subscribed is called as
A] hand-off B] roamer C] page D] MTSC
4. MSC is otherwise called as
A] MTSO B] BSC controller C] MS D]GMSC
5. Forward voice channel is used for
A] voice transmission from BS to Mobile C] Both A & B
B] voice transmission from Mobile to BS D] None
6. Function of network layer_________________
A] Routing B] Data transfer C] Error check D] None
7. Actual coverage area of a cell is _________________
A] Perigee B] BSS C] Footprint D] Cell Capacity
8. Structure of a cell is in the shape of_______________
A] polygon B] square C] hexagon D] Circle
9. Which wave is used as Carrier in modulation?
A] sine wave B] sawtooth wave C] square wave D] None
10. Multiplexing Means
A] one to many B] Many to many C] Many to one D] many to many
11. Relationship between ,f, and velocity c is
A] =1 / f B] = c / f C] f = c D] c = f /
12. Relationship between bandwidth and cost is
A] BW cost B] BW 1/cost C] BW = cost D] None
13. A phase shift of 90 degree on a point is called as ______________
A] In-phase B] Quadrature C] half- phase D] None
14. A straight line exists between the sender and receiver is called as__________
A] LOS B] FPL C] PL D] None
15. Which one is represented as Barker code?
A] 10110111000 B] 11001101 C] 10101 D] 10001001
16. Function of Transport layer______________
A] Correction of errors B] routing the packets
C] establish end-end connection D] None
17. Function of datalink layer______________
A] Correction of errors B] routing the packets
C] Establish end-end connection D] None
18. Which one is a modulation technique?
A] CDMA B] FDMA C] SDMA D] NONE
19. Which one is multiplexing access technique?
A] FDM B] CDM C] TDMA D] SDM
20. Main advantage of Spread spectrum is_______________
A] Spreading the bandwidth B] Both A & C
C] Resistance to narrow bandwidth D] Medium Usage
21. How will find a chipping sequence is too good using CDMA?
A] Matrix calculation B] Orthogonal C] both B & D
D] Autocorrelation
22. IEEE 802.11i is developed for ____________
A] spectrum Managed B] MAC enhancement C] IAP Protocol
D] Enhance Security Mechanisms
23. In database, what is referred as ACID?
A] Atomicity and Isolation B] Durability C] Consistency D] ALL
24. Is adhoc needs an infrastructure?
A] Yes B] No C] Either Yes or No D] Neither Yes nor NO
25. Digital Audio Broadcasting Systems can use
A] single frequency network B] Multicasting C] Broadcasting D] None
26. What is the condition to keep a satellite in a stable circular orbit?
A] Fg * Fc B] Fg = Fc C] Fg + Fc D] Fg – Fc
27. Which TCP protocol splits the connection into two connections?
A] Mobile TCP B] Snooping TCP
C] Indirect TCP D] None
28. Which control said to be a temporary overload in transmission path?
A] Selective Retransmission B] Congestion
C] Slow start D] Fast Recovery/Fast Retransmit
29. Which Protocol is Friendly manner in network?
A] TCP B] UDP C] FTP D] HTTP
30. Scatternet refers
A] group of Bluetooth devices B] group of piconets
C] group of parked devices D] group of master and slave devices
31. Bluetooth is
A] an ADHOC piconet B] a Wireless network
C] a limited coverage with infrastructure D] None
32. Allowing all terminal and software from different vendors to communicate with networks from different providers is known as
A] Scalable B] Reliable C] Interoperable D] None
33. MAC layer responsible is
I] medium access II] fragmentation of data III] Encryption
A] Either I or II B] Either I or III C] Neither I nor II nor III D] All
34. High Definition TV(HDTV) with a resolution of
A] 800*600 B] 600*800 C] 1920*1080 D] 1080*1920
35. Unidirectional Communication system means
A] Symmetrical B] Asymmetrical C] both A & B D] None
36. How many GEO satellites are enough to cover full area of our earth?
A] 5 B] 2 C] 3 D]10
37. Which packet switching connection exists a path between two end users after DISC?
A] Virtual B] Circuit
C] Destination identity D] None
38. In OVSF spreading factor “n” becomes
A] 2n B] n/2 C] n+1 D] n*n
39. Cell capacity and Cell diameter are the two major difference between
A] DECT & UMTS B] DECT & TETRA
C] GSM & DECT D] TETRA & UMTS
40. Which Mode refers not reachable state in mobile?
A] BUSY B] STANDBY C] IDLE D] FREE
41. Whenever Handover needs?
A] MS out of range B] signal level decreases C] load balancing D] All
42. Heart of the GSM is__________________
A] NSS B] OSS C] RSS D] All
43. Which controls the databases in GSM?
A] BSS B] MSC C] BTS D] NSS
44. MMS, EMS, SMS services are offered by ________ in GSM.
A] Bearer B] Supplementary C] Tele D] None
45. GSM expands _____________________________
A] Groupe Speciale Mobile B] Global System for Mobile communication
C] Both A & B D] Either A or B
46. Which one is Scarce Resource?
A] TDMA B] FDMA C] CDMA D] SDMA
47. Which is used to access the medium only “If the carrier is IDLE, decreases the probability of collision”?
A] CSMA B] DAMA C] MACA D] ISMA
48. In frequency hopping “Hops per bit” referred as
A] Fast hopping B] Slow hopping
C] Frequency Hoping D] A&B
49. Delay spread caused by _____
A] Attenuation Loss B] Propagation Effects
C] Multipath Propagation D] LOS
50. Which is the responsible for conversion of bits into signals in ISO?
A] Application Layer B] Datalink Layer
C] Physical Layer D] None
ANSWERS:
1. D 2. A 3. B 4. A 5. B
6. A 7. A 8. C 9. A 10. C
11. D 12. A 13. B 14. A 15. A
16. A 17. C 18. D 19. C 20. C
21. C 22. D 23. D 24. B 25. A
26. B 27. C 28. B 29. A 30. B
31. A 32. C 33. D 34. C 35. B
36. C 37. B 38. A 39. C 40. C
41. D 42. A 43. B 44. C 45. C
46. B 47. A 48. A 49. C 50. C
No comments:
Post a Comment