Correct : B. Gateway Mobile Service Switching Center
7. AMPS stands for
Correct : B. Advanced Mobile Phone System
8. AMPS is used in
Correct : A. 1G
9. GPRS technology was introduced in
Correct : A. 2G
10. GPRS stands for
Correct : D. General Packet Radio Service
11. Which functional block in GSM architecture,consists of the radio transmitters and receivers circuits and their associated antennas?
Correct : A. BTS
12. Which functional block in GSM architecture, allocates radio resourses to a mobile call and for handovers?
Correct : B. BSC
13. Which functional block in GSM architecture is responsible for necessary switching functions required for MSs located in an associated geographical area?
Correct : C. MSC
14. ………………provides MS information used by MSC and maintains a list of legitimate,fraudulent or faulty MSs.
Correct : B. EIR
15. ……….. Is the database that allows checking of the user with assigned SIM card.
Correct : A. AUC
16. ……recognizes that the MS is from another PLMN when roaming is allowed.
Correct : D. VLR
17. …….stores the subscrier information and part of mobile information from home PLMN.
Correct : C. HLR
18. IMEI stands for
Correct : B. International Mobile Equipment Identity
19. IMSI stands for....
Correct : C. International Mobile Subscriber Identity
20. The IMEI can be found by entering what on the handset keypad?
Correct : B. *#06#
21. In GSM-900 system, two subbands of ………..are assigned.
Correct : D. 25 MHz
22. In GSM-900 system, total number of radio carriers are……………
Correct : B. 124
23. In GSM-900 system, uplink frequency is ……………
Correct : A. 935MHz-960MHz
24. In GSM-900 system, downlink frequency is ……………
Correct : D. 890MHz-915MHz
25. In GSM-900 system, uplink and downlink carrier frequency differ by ……………
Correct : B. 45MHz
26. A single 2G GSM frame consists of……..time slots
Correct : B. 8
27. GSM Architecture consists of …..
Correct : D. All the above
28. GSM Architecture consists of ….. Interface
Correct : D. All the above
29. GSM Architecture consists of …..
Correct : D. All the above
30. DCS 1800 has the uplink frequency range
Correct : B. 1710MHz-1785MHz
31. DCS 1800 has the uplink frequency range
Correct : C. 1805MHz-1880MHz
32. DCS 1800 has the uplink and downlink frequency interval of …..
Correct : C. 95MHz
33. DCS 1800 has ……number of duplex channels
Correct : B. 374
34. ……..services are supported by the GSM
Correct : D. All the above
35. 2G GSM architecture follows ……. Reference Model
Correct : A. OSI Model
36. Which kind of switching technique indicates the transfer of coded values from input to output during the same interval of time?
Correct : A. Space Switching
37. Which form/s of grading design has/have the tendency to share every trunk between equal number of groups?
Correct : A. Homogeneous Grading
38. The-------------- is a circuit switched network, while the -------------- is a packet- switched network
Correct : A. telephone, ATM
39. When a switch capacity is full, calls coming into that switch are said to be____.
Correct : C. blocked
40. Example of circuit switching and S&F (Stored and Forward) switching is
Correct : A. Telephone and Post of Telegraph
41. In ------------- each packet is treated independently of all others
Correct : B. datagram switching
42. In message switching system, an incoming message gets ____ especially if the required route is busy.
Correct : B. Stored in a queue & retransmitted
43. Which type of switching network involves the establishment of a dedicated path between two stations?
Correct : C. Circuit Switching
44. In packet switching, what does the header of each short size of packet consist of?
Correct : D. All of the above
45. If a group of trunk is offered 1200 calls during the busy hour & 20 calls are lost along with the average call duration of about 7 min, then what would be the total duration of congestion period?
Correct : C. 57.6 sec
46. In two-stage network, which phenomenon/situation occurs due to impossible connectivity of given incoming trunk to selected outgoing trunk specifically because of link utilization for other connection between primary and secondary switches?
Correct : C. Blocking
47. By how many times does the time division exchange exhibit connection and disconnection with respect to every millisecond, due to its ability of using rearrangeable networks?
Correct : C. 8
48. Which signals are regarded as call-progress signals as they are sent back to inform the caller about the progress of the call?
Correct : B. Status Signals
49. Which among the following can be adopted as a dedicated path between the source and destination in circuit switching?
Correct : D. All of the above
50. Consider the statements given below. Which among them represents the operational step executed in datagram Packet Switched Network?
Correct : D. Transmission of short messages of one or two packet length
51. Rectangular crosspoint array is a
Correct : A. Space switching
52. A time division time switch can be controlled in
Correct : D. All of above
53. In a one-stage space division switch, if N = 200, the number of cross points is
Correct : C. 40,000
54. ESS stands for
Correct : A. Electronic Switching System
55. Circuit switching takes place at the layer of
Correct : B. physical
56. Trunks are the lines that run between
Correct : C. Switching stations
57. Availability of single processor system is given by
Correct : D. MTBF/(MTBF+MTTR)
58. Unavailability of single processor system is given by
Correct : B. MTTR/MTBF
59. Availability of Dual processor system is given by
Correct : D. (MTBF)2/(MTBF)2+2(MTTR)2
60. Unavailability of Dual processor system is given by
Correct : B. 2MTTR2/MTBF2
61. Who developed the fundamental of trunking theory?
Correct : C. Erlang
62. MTTR means
Correct : C. Mean Time To Repair.
63. Which form/s of grading design has/have the tendency to share every trunk between equal numbers of groups?
Correct : A. Homogeneous Grading
64. In a time multiplexed space switching system, one speech sample appears every
Correct : A. 125 micro sec
65. Time synchronization is necessary in
Correct : B. TDM
66. Three methods of switching are
Correct : B. circuit switching, packet switching, and message switching
67. If ‘n’ number of users are present in a network with point-to-point links, then how many links will be required in the network?
Correct : B. n (n – 1) / 2
68. Which among the following is/are adopted by cross bar systems with hard wired control subsystem?
Correct : C. Both a and b
69. What is the hardware, used to establish connection as an electrical path between inlet and outlet pair in switching system, known as?
Correct : C. Both a and b
70. In folded type of network, ____
Correct : B. output lines are folded back to input lines
71. For the two-group grading consisting of 14 trunks, availability = 5, Ak = 1.4E and the required grade of service of about 0.01, what would be its traffic capacity?
Correct : A. 4.98 E
72. Which kind of switching system does not comprise any subscriber, concentrator or expander?
Correct : D. Tandem
73. In Electronic Switching Centre (ESC), the transmission rate of X.25 protocol is ____9.6 Kbps.
Correct : C. Greater than
74. In a single stage network
Correct : B. There is redundancy
75. What are the Methods to move data through a network of links and switches
Correct : D. Both a and b
76. In _________ resources are allocated on demand.
Correct : A. Packet switching
77. The situation when both transmitter and receiver have to work in tandem is referred to as
Correct : C. Synchronous
78. Given that MTBF=2000Hrs and MTTR = 4Hrs. Calculate the unavailability for single processor systems for 10 years and 30 years.
Correct : A. For 10years: U=175.2Hrs and For 30 Years, U=525.6 Hrs.
79. Given that MTBF=2000Hrs and MTTR = 4Hrs. Calculate the unavailability for dual processor systems for 10 years and 30 years.
Correct : A. For 10years: U=40.04 min and For 30 Years, U=2.1 Hrs.
80. Dual processor operates in ____ modes
Correct : D. All of the above
81. Total number of crosspoints in the two stage concentrator network
Correct : A. C2=2/M1/2 N
82. Total number of crosspoints in the two stage Expander network
Correct : B. C2=2/N1/2 M
83. Total number of crosspoints in the three stage concentrator network
Correct : C. C3=2N/(M+N)1/2
84. Total number of crosspoints in the three stage expander network
Correct : D. C3=2M/(M+N)1/2
85. Number of inlets and outlets in the two stage concentrator network are given by the formula
Correct : A. m = n= M1/2
86. Number of inlets and outlets in the two stage Expander network are given by the formula