Description : The most common technique to change an analog signal to digitaldata is called __________. A) PAL B) PCM C) sampling D) none of the abov
Last Answer : PCM
Description : Infiber optics, thesignal is_______ waves. A) light B) radio C) infrared D) very low-frequency
Last Answer : light
Description : The _______ technique uses M different carrier frequencies that are modulated by the source signal. At one moment, the sign modulates one carrier frequency; at the next moment, thesignal modulates another carrier frequency. A) FDM B) DSSS C) FHSS D) TDM
Last Answer : FHSS
Description : In TDM, the transmissionrate of the multiplexed path isusually_______ thesum of thetransmission rates of thesignal sources. A) greater than B) less than C) equal to D) not related to
Last Answer : greater than
Description : When propagationspeed is multiplied by propagation time, we get the ________. A) throughput B) wavelength of thesignal C) distortionfactor D) distancea signal or bit has traveled
Last Answer : distancea signal or bit has traveled
Description : The main advantage of DM over PCM is:
Last Answer : simple circuit
Description : In SQL, which command(s) is(are) used to change atable's storage characteristics? A. ALTER TABLE B. MODIFY TABLE C. CHANGE TABLE D. All of theabove E. None of the abov
Last Answer : ALTER TABLE
Description : PIM-DM is used in a _______ multicast environment, suchas a LAN. A) dense B) sparse C) a or b D) none of the above
Last Answer : dense
Description : Involves compression in the transmitter after the input sample has been converted to a linear PCM code and then expansion in the receiver prior to PCM coding:
Last Answer : Digital companding
Description : Type of PCM which is designed to take advantage of the sample-to-sample redundancies in the typical speech waveform
Last Answer : Differential PCM
Description : Inan HFC network, the upstream data are modulated using the _______ modulation technique. A) QAM B) QPSK C) PCM D) ASK
Last Answer : QPSK
Description : Inan HFC network, the downstream data are modulated using the _______ modulation technique. A) PSK B) QAM C) PCM D) ASK
Last Answer : QAM
Description : The first step in PCM is ________. A) quantization B) modulation C) sampling D) none of the above
Last Answer : sampling
Description : PCM is an example of _______ conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digital
Last Answer : analog-to-digital
Description : Floppy disks typically in diameter a. 3‛ b. 5.25‛ c. 8‛ d. All of abov
Last Answer : All of abov
Description : The maximum frame length for 10-Mbps Ethernet is ________ bytes. A) 1518 B) 1500 C) 1200 D) none of the abov
Last Answer : 1518
Description : A virtual local areanetwork (VLAN) is configured by _________. A) software B) physical wiring C) hardware D) none of the abov
Last Answer : software
Description : A bridge can use the _________algorithm tocreate aloopless topology. A) binary tree B) spanning tree C) multiway tree D) none of the abov
Last Answer : spanning tree
Description : ___ cable can carry signals ofhigher frequency ranges than_____ cable. A) Twisted-pair; fiber-optic B) Coaxial; fiber-optic C) Coaxial; twisted-pair D) none of the abov
Last Answer : Coaxial; twisted-pair
Description : _________ utilization is the useof availablebandwidthto achieve specificgoals. A) Frequency B) Bandwidth C) Amplitude D) None of the abov
Last Answer : Bandwidth
Description : In_________ transmission, we send bits oneafter another without startor stop bits or gaps. It is the responsibilityof the receiver togroup the bits. A) synchronous B) asynchronous C) isochronous D) none of the abov
Last Answer : synchronous
Description : In IPv6,a ______address is used ifa site with several networks uses the Internetprotocols but is not connectedto the Internet for security reasons. A) link local B) site local C) mapped D) none of the abov
Last Answer : site local
Description : In IPv6,options are inserted between the _________and the ___________ data. A) baseheader;extensionheader B) baseheader;upper-layer data C) base header; frame header D) noneof the abov
Last Answer : baseheader;upper-layer data
Description : _____defines how a particular pattern to be interpreted,and whataction is tobe taken based on that interpretation. A) Semantics B) Syntax C) Timing D) None of the abov
Last Answer : Semantics
Description : Which of the following will happen when data is entered into a memory location? a. It will add to the content of the location b. It will change the address of the memory location c. It will erase the previous content d. It will not be fruitful if there is already some data at the location
Last Answer : It will erase the previous content
Description : A scientist finds a foramina on a bone sample. What can the scientist conclude?
Last Answer : this bone was located near the brain
Description : Inthe _______method, after thestation finds the line idle it sends or refrainfrom sending based on the outcome ofa random number generator. If the line is busy, it tries again A) nonpersistent B) 1-persistent C) p-persistent D) none of the above
Last Answer : p-persistent
Description : Inthe _________ method, after the station finds the lineidle, it sends its frame immediately. If the line isnot idle, it continuously senses theline until it finds it idle. A) nonpersistent B) 1-persistent C) p-persistent D) none of the above
Last Answer : 1-persistent
Description : Touse a cable network for data transmission, we needtwo keydevices:a ______ and a _________ A) CM; CMS B) CT; CMTS C) CM; CMTS D) none of the above
Last Answer : CM; CMS
Description : Which of the following wavelengths where absorption of electromagnetic waves becomes peak due to vibrational resonances in the water vapor molecule? A. 1.35 cm and 1.7 mm B. 1.5 mm and 5 mm C. 1.35 dm and 1.7 cm D. 1.5 cm and 5mm
Last Answer : A. 1.35 cm and 1.7 mm
Description : Which of the following wavelengths where absorption of electromagnetic waves becomes peak due to vibrational resonances in the water vapor molecule? A. 1.35 cm and 1.7 mm B. 1.5 mm and 5mm C. 1.35 dm and 1.7cm D. 1.5 cm and 5 mm
Description : The radius of hydrogen atom is about a) 5 x 10-11 m b) 5 x 10-11 cm c) 5 x 10-11 mm d) 5 x 10-11 dm
Last Answer : a) 5 x 10-11 m
Description : Rotary drilling (A) Is not suitable for deposits containing very coarse gravel (B) Hinders the ground water observations and permeability test (C) Is not economical for holes of less than 10 cm (D) All the above
Last Answer : Answer: Option D
Description : The size of a floor tile commonly used, is (A) 15 cm × 15 cm × 1.8 cm (B) 20 cm × 20 cm × 2 cm (C) 22.5 × 22.5 cm × 2.2 cm (D) All the abov
Description : A sample of NO experiences a change in pressure from 0.5734 atm to 5.1663 atm. If its new volume is 89.811 L, what was its original volume in liters ____ L?
Last Answer : 809.2(Explanation): boyle's law of PV=PV for this problem. Plug in values we know, (the pressures and new volume) to get 0.5734V=(5.1663)(89.811). Now solve for V by dividing by 0.5734 on both sides. You get 809.1917846. Round to 4 sig figs to get 809.2.
Description : ______ is a branch of computer science which deals with helping machines finds solutions to complex problems in a more human like fashions A. Artificial Intelligence B. Internet of Things C. Embedded System D. Cyber Security
Last Answer : A. Artificial Intelligence
Description : Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about (A) 8800 kcal/m3 (B) 8800 kcal/kg (C) Same as that of coal middling (D) 25000 kcal/kg
Last Answer : (B) 8800 kcal/kg
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 modern days, sales approach is based on ________ 1. value sharing 2. relation building 3. coordinated approach 4. all of the above 5. none of the abov
Last Answer : all of the above
Description : The RTS and CTS frames in CSMA/CA ____ solvethe hidden stationproblem. The RTS and CTS frames in CSMA/CA ____ solve the exposed station problem. A) can; cannot B) cannot; can C) can; can D) cannot; cannot
Last Answer : can; cannot
Description : A generator that contains afactor of ____ can detectall odd-numberederrors. A) x B) x + 1 C) 1 D) none of the above
Last Answer : x
Description : We candivide today's networks into ____ broad categories. A) four B) three C) five D) two
Last Answer : three
Description : We candivide ____ into two different schemes: synchronousor statistical. A) FDM B) TDM C) WDM D) none of the above
Last Answer : TDM
Description : ____ is designed to use thehigh bandwidthcapabilityof fiber-optic cable. A) FDM B) TDM C) WDM D) None of the above
Last Answer : WDM
Description : In a multiplexed system,__ lines share thebandwidthof ____ link. A) 1; n B) 1; 1 C) n; 1 D) n; n
Last Answer : n; 1
Description : The signal rate is sometimes called the ____ rate. A) baud B) bit C) signal D) none of the above
Last Answer : baud
Description : In IPv6,____ address defines a groupof computers with addresses that have thesame prefix. A) aunicast B) a multicast C) an anycast D) none of the above
Last Answer : an anycast
Description : RPF guarantees that eachnetwork receives only ____ of the multicast packet. A) one copy B) two copies C) a or b D) none of the above
Last Answer : none of the above
Description : ____ are special-interest groups that quickly test, evaluate, andstandardize new technologies. A) Forums B) Regulatory agencies C) Standards organizations D) All of theabove
Last Answer : Forums
Description : Application layer protocol defines ____ a.types of messages exchanged b.message format, syntax and semantics c.rules for when and how processes send and respond to messages d.all of the mentioned
Last Answer : d.all of the mentioned