MCQs in Communications Engineering Part 10

Compiled Miscellaneous Multiple Choice Questions in Communications Engineering Part 10 of the series. Familiarize each and every questions compiled here in Preparation for the ECE Board Exam

This is the Miscellaneous Multiples Choice Questions Part 10 of the Series in Communications Engineering. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in Communications Engineering field (Electronics Systems and Technologies). In the actual board, you have to answer 100 items in Electronic Systems and Technologies within 5 hours. You have to get at least 70% to pass the subject. Electronic Systems and Technologies is 30% of the total 100% Board Rating along with Mathematics (20%), General Engineering and Applied Sciences (20%) and Electronics Engineering (30%).

The Series

Following is the list of multiple choice questions in this brand new series:

Miscellaneous Communications Engineering MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII
PART 8: MCQs from Number 351 – 400                 Answer key: PART VIII
PART 9: MCQs from Number 401 – 450                 Answer key: PART IX
PART 10: MCQs from Number 451 – 500                 Answer key: PART X

Continue with Part X of the Series

Choose the letter of the best answer in each questions.

451. What is the operating frequency of Wibro?

• A. 2.1 GHz
• B. 2.3 GHz
• C. 2.2 GHz
• D. 2.4 GHz

452. What is the base station data throughout for Wibro?

• A. 30 to 50 Mbps
• B. 40 to 60 Mbps
• C. 50 to 70 Mbps
• D. 60 to 80 Mbps

453. The maximum radius for Wibro is ____.

• A. 2 km
• B. 3 km
• C. 4 km
• D. 5 km

454. _____ is a published specification set of high level communication protocols designed to use small, low-power digital radios based on the IEEE 802.15.4 standard for wireless personal area networks.

• A. bluetooth
• B. wpan
• C. zigbee
• D. wlan

455. In a Zigbee network, a single device that controls the network is called _____.

• A. master
• B. server
• C. coordinator
• D. pointer

456. Devices being controlled in a zigbee network are known as _____.

• A. end devices
• B. clients
• C. slaves
• D. beggars

457. The modulation scheme used by IEEE 802.11b

• A. OFDM
• B. CCK
• C. QPSK
• D. FDM

458. The modulation scheme used by IEEE 802.11a

• A. OFDM
• B. CCK
• C. QPSK
• D. FDM

459. The World Wide Web or WWW was invented in the year _____.

• A. 1991
• B. 1990
• C. 1989
• D. 1995

460. He invented the World Wide Web or WWW

• A. Karel Capek
• B. Tim Berners-Lee
• C. Jon Von Neumann
• D. Bill Gates

461. The number of satellites used by GLONASS

• A. 30
• B. 26
• C. 24
• D. 31

462. A 3G technology that delivers broadband-like data speeds to mobile devices.

• A. EDGE
• B. HSCSD
• C. VOIP
• D. 3GSM

463. ADSL has maximum distance of _____.

• A. 16,000 feet
• B. 8,000 feet
• C. 18,000 feet
• D. 12,000 feet

464. ______ is an implementation of ADSL that automatically adjusts the connection speed to adjust for the quality of the telephone line.

• B. SDSL
• D. HDSL

465. A type of DSL that was developed to support exceptionally high-bandwidth applications such as High-Definition Television (HDTV).

• A. VDSL
• B. SDSL
• D. XDSL

466. A method for moving data over regular phone lines which is much faster than a regular phone connection and the wires coming into the subscriber’s premises are the same copper wires used for regular phone service.

• A. VOIP
• B. DSL
• C. Cable Internet
• D. POTS

467. What is the IEEE designation for Bluetooth?

• A. 802.15
• B. 802.14
• C. 802.10
• D. 802.16

468. The IEEE designation for wireless LAN

• A. 802.12
• B. 802.13
• C. 802.5
• D. 802.11

469. The IEEE designation for broadband wireless network

• A. 802.16
• B. 802.15
• C. 802.14
• D. 802.13

470. The file extension for jpeg

• A. .jpg
• B. .jpe
• C. .jfif
• D. any of these

471. In SMS, the number of characters being sent in the network is _____ when Latin alphabet is used.

• A. 80
• B. 160
• C. 65
• D. 100

472. In SMS, the number of characters being sent in the network is _____ when non-Latin alphabet is used.

• A. 50
• B. 60
• C. 70
• D. 80

473. It is an enhancement of data services of all current GSM networks, it allows you to access nonvoice services at 3 times faster

• A. GPRS
• B. HSCSD
• C. VOIP
• D. 3GSM

474. A language derived from HTML especially for wireless network characteristics.

• A. Delphi
• B. PHP
• C. Pearl
• D. WML

475. The founding father of the Internet

• A. Tim Burners-Lee
• B. Vinton Gray Cerf
• C. Jon Von Neumann
• D. Carel Kapek

476. What term is used by in asynchronous transfer mode (ATM) system to describe a byte?

• A. harmonic
• B. octet
• C. actave
• D. bit

477. The relative permittivity of silicon is _____

• A. 11.7
• B. 1.17
• C. 1.18
• D. 11.8

478. One of the following is NOT classified as a Customer Premises Equipment (CPE) by the NTC.

• A. Automatic Teller Machine
• B. Videophone Terminal Equipment
• C. VSAT
• D. ISDN Terminal Equipment

479. Zigbee network layer supports the following topologies except:

• A. tree
• B. bus
• C. star
• D. mesh

480. An Internet Messaging service can be either _____.

• A. user-based or company based
• B. sender-based or receiver based
• C. network-based or device-based
• D. feature-based or attachment-based

481. The level of ____ within an IM program brings up the issue of privacy.

• A. users signed up
• C. technology
• D. presence awareness

482. One reason behind the success of the Internet is the fact that it is built on _____.

• A. open standard
• B. user trust
• C. safe architecture
• D. solid ground

483. Which of the following is not an additional revenue opportunity offered by advance messaging services?

• A. electronic commerce
• C. targeted marketing
• D. taxes

484. ADSL increases existing twisted-pair access capacity by _____.

• A. twofold
• B. threefold
• C. thirtyfold
• D. fiftyfold

485. What appears to be the practical limit for analog modems over a standard telephone?

• A. 33 kbps
• B. 28.8 kbps
• C. 24 kbps
• D. 19.2 kbps

486. Which of the parameters will need to be incorporated into next generation billing solutions to calculate new 3G charges?

• A. number of packets
• B. location
• C. quality of service
• D. any of these

487. Which of the following is not considered as 3G service?

• A. streaming video
• B. wireless voice
• C. interactive shopping
• D. on-line banking and stock trading

488. ATM timing requirements feature _____ elements.

• A. 3
• B. 4
• C. 32
• D. 64

489. All are required for broadband media services delivery over IP except:

• A. high bandwidth
• C. a narrowband connection
• D. DSL

490. All are network components for broadband media services except

• A. video server
• B. catv box
• C. set-top box
• D. video encoder

491. A Cable Modem Termination System (CMTS) provides an Ethernet network with a geographic reach of up to _____.

• A. 1 mile
• B. 10 miles
• C. 100 miles
• D. any of these

492. The upstream data channel specification requirement for cable modem feature which of the following?

• A. 64 and 256 QAM formats
• B. data rates from 320 kbps to 10 Mbps
• C. 6 MHz-occupied spectrum that coexists with other signals in the cable plant
• D. all of the above

493. DWDM enables different formats, such as ______, to be transmitted over the optical layer.

• A. IP and ATM
• B. ATM and SONET
• C. SONET and SDH
• D. all of the above

494. Future DWDM terminals will have the capacity to transmit _____ volumes of an encyclopedia in one second.

• A. 90
• B. 250
• C. 1500
• D. 90000

495. DWDM allows the transmission of _____ over the optical layer.

• A. voice and e-mail
• B. multimedia and video
• C. data
• D. all of the above

496. Which of the following is expected to take the largest share of the three DSL varieties?

• A. SDSL
• B. HDSL
• D. IDSL

497. Which of the following standards defines procedures and message sequences used for fax communications?

• A. T.10
• B. T.30
• C. T.37
• D. T.38

498. The _____ is a particular set of standards that allows the internetworking of products from different vendors. It usually embodies a fiber-optic ring that will permit transmission in both directions.

• A. local-area network (LAN)
• B. wide-area network (WAN)
• C. synchronous optical network (SONET)
• D. common channel signaling network

499. H.255 can be defined as _____.

• A. media stream control
• B. control signaling
• C. call signaling
• D. media stream transport

500. H.245 can be defined as _____.

• A. media stream control
• B. control signaling
• C. media stream transport

501. H.323 can be defined as _____.

• A. multimedia services over B-ISDN
• B. multimedia services over guaranteed QoS networks
• C. multimedia services over packet networks
• D. multimedia services over SCN

502. H.320 can be defined as _____.

• A. multimedia services over B-ISDN
• B. multimedia services over guaranteed QoS networks
• C. multimedia services over packet networks
• D. multimedia services over ISDN

503. One of the major advances that result from implementing intelligent networks is that _____.

• A. computers no longer have control over the network
• B. wide-area service outages are much less likely
• C. services can be adapted to user needs more efficiently
• D. service providers are now limited to a single equipment provider

504. The development of the intelligent network places increased emphasis on a consistent _____.

• A. switch model
• B. network model
• C. intelligence model
• D. call model

505. How many layers are there to the PCS air resistance?

• A. 1
• B. 2
• C. 3
• D. 4

506. What is the maximum possible number of characters in a PCS message?

• A. 64
• B. 256
• C. 1021
• D. 239

507. Signaling units are broken up into units of how many bits?

• A. 8
• B. 16
• C. 32
• D. 64

508. Two digital signals whose transitions occur at almost the same rate are _____.

• A. asynchronous
• B. synchronous
• C. plesiochronous
• D. none of these

509. Which of the following are not basic SONET network elements?

• A. switch interference
• B. digital loop carrier
• C. service control point

510. Higher-order SDH cross-connects route what entity?

• A. 1.5 Mbps
• B. ATM cells
• C. management data channels
• D. payload within 155 Mbps

511. Scrambling is used in SDH for which reason?

• A. to randomize the bit sequence for better transmission performance
• B. to reduce the power consumption of equipment
• C. to allow for upgrade to higher bit rates
• D. to prevent unauthorized access

512. FDMA allocated ____ users per channel.

• A. 1
• B. 3
• C. 6
• D. 10

513. The G.723.1 specification for audio codecs, recommended by the VoIP Forum, requires:

• A. 6.3 kbps
• B. 7.9 kbps
• C. 8.4 kbps
• D. 10.4 kbps

514. ITU’s H.320 standard defines the protocols for transporting voice, data and video over;

• A. PSTN
• B. ISDN networks
• C. the public internet
• D. GSM network

515. Which of the following is not a layer in the WAP gateway stack?

• A. WDP
• B. context manager
• C. TCP
• D. WSP

516. Queries to the HLR are performed to find the location of the serving MSC in _____.

• A. TDMA
• B. CDMA
• C. GSM
• D. all of the above

517. The SMSC delivers messages directly to the _____.

• A. HLR
• B. VLR
• C. MSC
• D. BSC

518. Which of the following pairs of technologies use IS-41?

• A. GSM and TDMA
• B. CDMA and GSM
• C. TDMA and CDMA
• D. all of the above

519. Which of the following technologies has significant advantages in medium-density and high-density population areas because it is capable of carrying higher levels of traffic, provides better voice quality, and can transmit data at higher rates?

• A. GSM
• B. PCS
• C. CT-2
• D. DECT

520. IS-41 is a standard currently being embraced by wireless providers because it encourages _____.

• A. increased network capabilities
• B. paging
• C. roaming
• D. all of the above

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