1) The modulation technique used for mobile communication systems during World War II was
a. Amplitude modulation
b. Frequency modulation
c. ASK
d. FSK
ANSWER: Frequency modulation
2) ---- introduced frequency modulation for mobile communications systems in 1935.
a. Edwin Armstrong
b. Albert Einstein
c. Galileo Galilei
d. David Bohm
ANSWER: Edwin Armstrong
3) The first push-to-talk FM telephone systems were used in
a. Simplex Mode
b. Half duplex mode
c. Full duplex mode
d. None of the above
ANSWER: Half-duplex mode
4) DECT means
a. Telex European digital cell phone
b. Digitized emergency cell phone
c. European Digital Cordless Phone
d. Digital European Cell Phone
ANSWER: Digital European Cordless Telephone
5) The world's first cellular system was developed by
a. Nippon Telephone and Telegraph (NTT)
b. Bellcore and Motorola
c. AT & T Bell Laboratories
d. Qualcomm
ANSWER: Nippon Telephone and Telegraph (NTT)
6) Paging systems were based on
a. Simplex Systems
b. Half duplex systems
c. Full duplex systems
d. None of the above
ANSWER: Simplex Systems
(7) Paging systems could be used to
a. Send numeric messages
b. Send alphanumeric messages
c. Voicemail
d. All of the above
ANSWER: All of the above
8) The garage door opener is a
a. Transmitter
b. Receiver
c. Transceiver
d. None of the above
ANSWER: Transmitter
9) The carrier frequency of a TV remote control is in range
a. From Infra red
b. <100 MHz
c. <1 GHz
d. <2 GHz
ANSWER: from Infra red
10) The half duplex system for communication has
a. One-way communication
b. Communication in one direction at a time
c. Communication in both directions at the same time
d. None of the above
ANSWER: One-way communication at a time
11) MIN means
a. Mobile Identification Number
b. Mobile Internet
c. Network Mobility
d. None of the above
ANSWER: Mobile Identification Number
12) The process of transferring a mobile station from one base station to another is
a. MSC
b. Roamer
c. Free hands
d. Feed channel
ANSWER: Handsfree
13) PCN is
a. Wireless concept of making calls
b. To receive calls
c. Regardless of the location of the user
d. All of the above
ANSWER: All of the above
14) IMT-2000 is a digital mobile system that works as
a. Pager
b. Without cable
c. Low Earth Orbit Satellites
d. All of the above
ANSWER: All of the above
15) The 2G cellular network uses
a. TDMA / FDD
b. CDMA / FDD
c. Digital modulation formats
d. All of the above
ANSWER: All of the above
16) NADC is a 2G standard for
a. TDMA
b. CDMA
c. Both a & b
d. None of the above
ANSWER: TDMA
17) 2G standard CDMA - cdma one supports up to
a. 8 users
b. 64 users
c. 32 users
d. 116 users
ANSWER: 64 users
18) 2G Standards Support
a. Limited Internet browsing
b. Short Messaging Service
c. Both a & b
d. None of the above
ANSWER: Both a & b
19) GSM 2G technology uses carrier separation of
a. 1.25 MHz
b. 200 KHz
c. 30 kHz
d. 300 kHz
ANSWER: 200 KHz
20) 3G W-CDMA is also known as
a. UMTS
b. DECT
c. DCS-1800
d. ETACS
ANSWER: UMTS
21) The mode commonly used for 3G networks is
a. TDMA
b. FDMA
c. TDD
d. FDD
ANSWER: FDD
22) The minimum spectrum allocation required for W-CDMA is
a. 5 MHz
b. 2 MHz
c. 500KHz
d. 100 kHz
ANSWER: 5MHz
23) CDMA2000 1xEV provides high-speed data access with channel allocation
a. 5 MHz
b. 50 MHz
c. 1.25 MHz
d. 4 MHz
ANSWER: 1.25 MHz
24) In TD-SDMA, there is a frame of _____milliseconds and the frame is divided into _____ time slots.
a. 5, 7
b. 7.5
c. 2, 5
d. 5, 2
ANSWER: 5, 7
25) Interference between neighboring base stations is avoided by
a. Assigning different groups of channels
b. Use of transmitters with different power levels
c. Use of different antennas
d. All of the above
ANSWER: Assigning different channel groups