Recent questions tagged wireless-mobile-network

Description : Which of the following is not backward compatible with Cdma2000? a) Cdma2000 1xRTT b) Cdma2000 3xRTT c) Cdma2000 1xEV-DO d) Cdma2000 1xEV-DT

Last Answer : c) Cdma2000 1xEV-DO

Description : What are the two options provided by Cdma2000 1xEV? a) Cdma2000 1xRTT. Cdma2000 3xRTT b) Cdma2000 1xEV-DO, Cdma2000 1xEV-DV c) Cdma2000 1xEV-DT, Cdma2000 1xEV-DO d) Cdma2000 1xRTT, Cdma2000 1xEV-DV

Last Answer : b) Cdma2000 1xEV-DO, Cdma2000 1xEV-DV

Description : How is bandwidth increased in Cdma2000? a) Clubbing adjacent radio channels b) Changing the hardware of base stations c) Change of spectrum d) Change of RF equipment

Last Answer : a) Clubbing adjacent radio channels

Description : Cdma2000 1xEV was developed by ________ a) Motorola b) AT&T Laboratories c) Qualcomm d) NTT

Last Answer : c) Qualcomm

Description : Which of the following is not a characteristic of Cdma2000? a) Adaptable baseband signalling rates b) Adaptable baseband chipping rates c) Multicarrier technologies d) OFDMA

Last Answer : d) OFDMA

Description : Cdma2000 works in TDD mode only. a) True b) False

Last Answer : b) False

Description : How many users are supported by Cdma2000 1X in comparison to 2G CDMA standard? a) Half b) Twice c) Six times d) Ten times

Last Answer : b) Twice

Description : Within ITU IMT-2000 body, Cdma2000 1xRTT is also known as ____________ a) Cdma2000 1xEV-DO b) Cdma2000 1xEV-DV c) IS-95B d) G3G-MC-CDMA-1X

Last Answer : d) G3G-MC-CDMA-1X

Description : Which of the following the first 3G CDMA air interface? a) IS-95 b) IS-95B c) Cdma2000 1xRTT d) CdmaOne

Last Answer : c) Cdma2000 1xRTT

Description : 2G and 2.5G CDMA operators may selectively introduce 3G capabilities at each cell without changing entire base stations and reallocate spectrums. a) True b) False

Last Answer : a) True

Description : Which of the following has no backward compatibility with 3G Cdma2000? a) IS-95 b) GPRS c) IS-95A d) IS-95B

Last Answer : b) GPRS

Description : The 2G GSM technology uses a carrier separation of _____________ a) 1.25 MHz b) 200 KHz c) 30 KHz d) 300 KHz

Last Answer : b) 200 KHz

Description : Which one of the following 2G standard is used in Japan? a) IS-136 b) GSM c) PDC d) AMPS

Last Answer : c) PDC

Description : 2G CDMA standard, IS-95, was proposed by which company? a) Nippon Telephone and Telegraph (NTT) b) Qualcomm c) Bellcore and Motorola d) AT&T Bell Laboratories

Last Answer : b) Qualcomm

Description : GSM (Global System for Mobile) was earlier also known as _____________ a) Group System Mobile b) Global Special Meaning c) Group Special Mobile d) Global Special Mobile

Last Answer : c) Group Special Mobile

Description : Which is one of the disadvantages of 2G standards? a) Short Messaging Service (SMS) b) Digital modulation c) Limited capacity d) Limited Internet Browsing

Last Answer : d) Limited Internet Browsing

Description : IS-136 uses which modulation technique? a) π/4 DQPSK b) BPSK c) GMSK d) AFSK

Last Answer : a) π/4 DQPSK

Description : IS-95 uses which modulation technique? a) GMSK b) BPSK c) QAM d) AFSK

Last Answer : b) BPSK

Description : Which modulation technique is used by GSM? a) GMSK b) BPSK c) QPSK d) GFSK

Last Answer : a) GMSK

Description : How many users are supported in IS-95 for each 1.25 MHz? a) Eight b) Sixty four c) Sixteen d) Twenty five

Last Answer : b) Sixty four

Description : How many voice channels are supported for each 30 KHz radio channel in IS-136? a) Eight b) Thirty c) Three d) Sixteen

Last Answer : c) Three

Description : How many users or voice channels are supported for each 200 KHz channel in GSM? a) Eight b) Three c) Sixty four d) Twelve

Last Answer : a) Eight

Description : Popular 2G CDMA standard IS-95 is also known as ______________ a) CdmaOne b) CdmaTwo c) IS-136 d) IS-95B

Last Answer : a) CdmaOne

Description : Which of the following is a CDMA standard of second generation network? a) IS-95 b) IS-136 c) ETACS d) EDGE

Last Answer : a) IS-95

Description : Which one is not a TDMA standard of second generation networks? a) GSM b) IS-136 c) AMPS d) PDC

Last Answer : c) AMPS

Description : Which of the following multiple access techniques are used by second generation cellular systems? a) FDMA/FDD and TDMA/FDD c c) FDMA/FDD and CDMA/FDD d) FDMA/FDD only

Last Answer : b) TDMA/FDD and CDMA/FDD

Description : Choosing a discrete value that is near but not exactly at the analog signal level leads to a) PCM error b) Quantization error c) PAM error d) Sampling error

Last Answer : b) Quantization error

Description : In PCM encoding, quantization level varies as a function of ________ a) Frequency b) Amplitude c) Square of frequency d) Square of amplitude

Last Answer : b) Amplitude

Description : Quantization noise can be reduced by ________ the number of levels. a) Decreasing b) Increasing c) Doubling d) Squaring

Last Answer : b) Increasing

Description : The length of the code-word obtained by encoding quantized sample is equal to a) l=log(to the base 2)L b) l=log(to the base 10)L c) l=2log(to the base 2)L d) l=log(to the base 2)L/2

Last Answer : a) l=log(to the base 2)L

Description : The signals which are obtained by encoding each quantized signal into a digital word is called as a) PAM signal b) PCM signal c) FM signal d) Sampling and quantization

Last Answer : b) PCM signal

Description : Which protocol is commonly used to retrieve email from a mail server? a) FTP b) IMAP c) HTML d) TELNET

Last Answer : b) IMAP

Description : Which is a link layer protocol? a) ARP b) TCP c) UDP d) HTTP

Last Answer : b) TCP

Description : In IPv4, service type of service in header field, first 3 bits are called ______ a) Type of service b) Code bits c) Sync bits d) Precedence bits

Last Answer : d) Precedence bits

Description : In IPv4 layer, datagram is of ________ a) Fixed length b) Variable length c) Global length d) Zero length

Last Answer : b) Variable length

Description : Header of datagram in IPv4 has _________ a) 0 to 20 bytes b) 20 to 40 bytes c) 20 to 60 bytes d) 20 to 80 bytes

Last Answer : c) 20 to 60 bytes

Description : Network layer at source is responsible for creating a packet from data coming from another ________ a) Station b) Link c) Node d) Protocol

Last Answer : d) Protocol

Description : In version field of IPv4 header, when machine is using some other version of IPv4 then datagram is __________ a) Discarded b) Accepted c) Interpreted d) Interpreted incorrectly

Last Answer : a) Discarded

Description : Checksum is used in Internet by several protocols although not at the _________ a) Session layer b) Transport layer c) Network layer d) Data link layer

Last Answer : d) Data link layer

Description : An internet is a __________ a) Collection of WANS b) Network of networks c) Collection of LANS d) Collection of identical LANS and WANS

Last Answer : b) Network of networks

Description : Protocols are set of rules to govern _________ a) Communication b) Standard c) Metropolitan communication d) Bandwidth

Last Answer : a) Communication

Description : Several protocols for upper layers in bluetooth use _________ a) UDP b) HSP c) ITC d) L2CAP

Last Answer : d) L2CAP

Description : How much increase in spectral efficiency is provided by W-CDMA in comparison to GSM? a) Two times b) Three times c) No increase d) Six times

Last Answer : d) Six times

Description : W-CDMA requires a complete change of RF equipment at each base station. a) True b) False

Last Answer : a) True

Description : What is the minimum spectrum allocation required by W-CDMA? a) 5 MHz b) 20MHz c) 1.25 MHz d) 200 KHz

Last Answer : a) 5 MHz

Description : How much packet data rate per user is supported by W-CDMA if the user is stationary? a) 2.048 Kbps b) 100 Mbps c) 2.048 Mbps d) 1 Gbps

Last Answer : c) 2.048 Mbps

Description : W-CDMA works in FDD mode only. a) True b) False

Last Answer : b) False

Description : What is the chip rate of W-CDMA? a) 1.2288 Mcps b) 3.84 Mcps c) 270.833 Ksps d) 100 Mcps

Last Answer : b) 3.84 Mcps

Description : UMTS is also known as _____________ a) IS-95 b) GPRS c) CdmaOne d) W-CDMA

Last Answer : d) W-CDMA

Description : UMTS does not has backward compatibility with ____________ a) GSM b) IS-136 c) IS-95 d) GPRS

Last Answer : c) IS-95