MCQ in Digital and Data Communication Networks Part 11 | ECE Board

This is the Multiple Choice Questions Part 11 of the Series in Digital and Data Communication Networks as one of the Communications Engineering topic. 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 but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

MCQ Topic Outline included in ECE Board Exam Syllabi

• MCQ in Bit and and Binary Transmission
• MCQ in Signaling Rate
• MCQ in Error Probability, Digital Filtering, Switching, Packet Circuit, Vertical Circuit
• MCQ in Open systems Interconnection
• MCQ in Multiplying, Modulation and Synchronization
• MCQ in Pulse Code Modulation, Companding, Encoding, Bandwidth and Signal to Noise Ratio
• MCQ in Delta Modulation, Slope Overload, Adaptive Delta Modulation, Codes and Protocol
• MCQ in Error Detection and Correction, Digital Carrier systems
• MCQ in Frequency Shift Keying, Phase Shift Keying, Differential Phase Shift keying
• MCQ in DC nature of data transmission, loops, Neutral and Polar
• MCQ in Binary transmission and the concept of time
• MCQ in Asynchronous and Synchronous, timing, Distortion, Bits, band, WPM
• MCQ in Data Interface standards, Data input/output devices
• MCQ in Digital Transmission on analog channel, Modulation-demodulation schemes parameters
• MCQ in Circuit conditioning, Modem Applications
• MCQ in Serial and Parallel Transmission

Continue Practice Exam Test Questions Part 11 of the Series

⇐ MCQ in Digital and Data Communication Networks Part 10 | ECE Board

Choose the letter of the best answer in each questions.

501. The non-coherent FSK needs Eb/N0 than coherent FSK.

A. 1 dB more

B. 1 dB less

C. 3 dB more

D. 3 dB less

502. The DPSK needs Eb/N0 than BPSK.

A. 1 dB more

B. 1 dB less

C. 3 dB more

D. 3 dB less

503. Which is easier to implement and is preferred?

A. coherent system

B. non coherent system

C. coherent & non coherent system

D. none of the mentioned

504. Which is the main system consideration?

A. probability of error

B. system complexity

C. random fading channel

D. all of the mentioned

505. In the frequency of the carrier signal is varied based on the information in a digital signal

A. ask

B. psk

C. fsk

D. qam

506. In the amplitude of the carrier signal is varied based on the information in a digital signal

A. ask

B. psk

C. fsk

D. qam

507. In modulation, the bit rate is 8 times the baud rate

A. 8-qam

B. 64-qam

C. 256-qam

D. none of above

508. In modulation, the baud rate is 1/4 times the bit rate

A. 4-qam

B. 2-psk

C. 4-psk

D. none of above

509. Which of the following is not a characteristic of PN sequence?

A. balance property

B. autocorrelation property

C. run property

D. non deterministic

510. _____ symbols.

A. 2m

B. m

C. 2m

D. 2m-1

511. PN sequence can be generated using.

A. sequential logic circuits

B. op-amp

C. timer ic

D. mosfet

512. DSSS system spreads the baseband signal by the baseband pulses with a pseudo noise sequence.

A. adding

B. subtracting

C. multiplying

D. dividing

513. Frequency hopping involves a periodic change of transmission

A. signal

B. frequency

C. phase

D. amplitude

514. What is the set of possible carrier frequencies in FH-SS?

A. hopset

B. hop

C. chips

D. symbols

515. The bandwidth of the channel used in the hopset is called

A. hopping bandwidth

B. total hopping bandwidth

C. instantaneous bandwidth

D. 3 dB bandwidth

516. The processing gain of FH systems is given by ratio of

A. hopping bandwidth and hopping period

B. instantaneous bandwidth and hopping duration

C. 3 dB bandwidth and bit rate

D. total hopping bandwidth and instantaneous bandwidth

517. Pseudorandom signal predicted.

A. can be

B. cannot be

C. maybe

D. none of the mentioned

518. In FH-SS which of the following Modulation Demodulation Technique has been used

A. bpsk

B. fsk

C. ask

D. qam

519. In DS-SS which of the following Modulation Demodulation Technique has been used

A. bpsk

B. fsk

C. ask

D. qam

520. Frequency division multiple access (FDMA) assigns channels to users.

A. individual, individual

B. many, individual

C. individual, many

D. many, many

521. The FDMA channel carries phone circuit at a time.

A. ten

B. two

C. one

D. several

522. The bandwidth of FDMA channel is

A. wide

B. narrow

C. large

D. zero

523. The symbol time in FDMA systems is thus intersymbol interference is

A. large, high

B. small, low

C. small, high

D. large, low

524. Due to transmission scheme bits are needed for overhead in FDMA systems.

A. continuous, few

B. discontinuous, few

C. continuous, many

D. discontinuous, many

525. ______ is based on FDMA/FDD.

A. gsm

B. w-cdma

C. cordless telephone

D. amps

526. Which of the following is not true for TDMA?

A. single carrier frequency for single user

B. discontinuous data transmission

C. no requirement of duplexers

D. high transmission rates

527. Because of transmissions in TDMA, the handoff process in

A. continuous, complex

B. continuous, simple

C. discontinuous, complex

D. discontinuous, simple

528. _____ synchronization overhead is required in TDMA due to _____ transmission.

A. high, burst

B. high, continuous

C. low, burst

D. no, burst

529.  ______ of TDMA system is a measure of the percentage of transmitted data that contains information as opposed to providing overhead for the access scheme.

A. efficiency

B. figure of merit

C. signal to noise ratio

D. mean

530. A TDMA system uses 25 MHz for the forward link, which is broken into radio channels of 200 kHz. If 8 speech channels are supported on a single radio channel, how many simultaneous users can be accommodated?

A. 25

B. 200

C. 1600

D. 1000

531. US digital cellular system based on CDMA was standardized as

A. is-54

B. is-136

C. is-95

D. is-76

532. Which of the following technique used in CDMA

A. qam

B. gmsk

C. ds-ss bpsk

D. fh-ss fsk

Questions and Answers in Digital and Data Communication Networks Series

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

Complete List of MCQ in Communications Engineering per topic