Multiplexer Question & AnswersApril 1, 2022 By WatElectronics This article lists 50 Multiplexer MCQs for engineering students. All the Multiplexer Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Multiplexer.In the world of digital systems specifically in large-scale based digital systems, a combinational device that has ‘2n’ number of input and ‘n’ number output lines along with 2 power n selectors is called a mux or a multiplexer. A multiplexer selects between 2 types of input signals namely analogue and digital. The function of multiplexers is to amplify information and boost information. They are classified as 2by1, 4by1, 8by1, and 16by1 MUX.The different types of multiplexing technologies include wavelength division multiplexing, add/drop multiplexing, inverse multiplexing, etc. They benefit in terms of minimum wires are required; zero K-maps and less circuit complexity. The disadvantage of multiplexer includes additional IO ports, complex firmware, and single-port access at a time. The field of applications of multiplexers includes communication systems, computer memory, and telephone network.1). A multiplexer is also called ___? MUX Data selector Multiplexor All the above Hint3 names.2). A multiplexer selects between ___ type of input signals? Analog Digital Both a and b None of the above Hint2 types.3). A multiplexer has ___ number of inputs? n 2 ^ n 2n n/2 HintHigher value.4). A multiplexer has ___ number of outputs? n 2^ n 2n n/2 HintOdd number.5). Which of the following is the function of multiplexer? Amplifiers information Boosts information Removes noise Both a and b Hint2 functions.6). How many inputs does a 4by1 mux consist of? 1 2 4 3 HintEven number.7). How many outputs does a 4by1 mux consist of? 1 2 4 3 HintOdd number.8). How many inputs does 2 by 1 mux comprises of? 1 2 3 4 HintEven number.9). How many outputs does 2 by 1 mux comprises of? 1 2 3 4 HintOdd number.10). If inputs (a,b) is (0,0) for a 2by 1 mux with selector ‘0’. Then the output is ___? 1 0 X None of the above HintLogic low.11). If inputs (a,b) is (0,1) for a 2by 1 mux with selector ‘0’. Then the output is ___? 1 0 X None of the above HintLogic high.12). If inputs (a,b) is (1,0) for a 2by 1 mux with selector ‘1’. Then the output is ___? 1 0 X None of the above HintLogic high.13). If inputs (a,b) is (1,1) for a 2by 1 mux with selector ‘1’. Then the output is ___? 1 0 X None of the above HintLogic high.Multiplexer Interview Questions and Answers14). A method of transmitting many signals over a specific medium is known as ____? Multiplexing De-multiplexing Aliasing Amplifying HintMultiple inputs single output line.15). Which of the following are the types of multiplexing technologies? Wavelength Division Multiplexing Add/Drop Multiplexing Inverse Multiplexing All the above Hint3 types.16). Which of the following is the Analog type multiplexer? Frequency Division Multiplexing Wavelength division multiplexing Synchronous TDM Both a and b Hint2 types.17). Which of the following is the Digital type multiplexer? Frequency Division Multiplexing Asynchronous TDM Synchronous TDM Both b and c Hint2types.18).Which of the following are the applications of FDM? Automation fields Textile industry Television All the above HintCommunication appliances.19). How many OR logic gates are required to design a 4by1 multiplexer? 1 2 3 4 HintOdd number.20). How many AND logic gates are required to design a 4by1 multiplexer? 1 2 3 4 HintEven number.21). Which of the following is the advantage of FDM? Zero synchronization between transmitter and receiver Budge friendly Greater latency All the above Hint3 advantages.22). Which of the following is the disadvantage of FDM? Cross talk Less throughput Requires high hardware All the above Hint3 disadvantages.23). A multiplexer is a ___ circuit? Combinational Sequential Both a and b None of the above HintA memory-less circuits.24). ____ pin in MUX represents the connection between nby1 MUX? Input Output Selector Both a and b Hinta nby1 MUX has n/2 pin.Multiplexer Quiz Questions and Answers.25). Which of the following is an example of non-electronic multiplexer circuit? Single pole multi position switch Bi-pole multi position switch Multi-pole position switch All the above HintUni-pole based.26). A multiplexer is constructed using ____ components? Active Passive Both a and b Zero components HintElectronic components. Read more about Electronic Circuits.27). Which of the following are the components of Analogue type multiplexer? Relays Transistors Logic gates Both a and b Hint2 components.28). Which of the following are the components of digital type multiplexer? Relays Transistors Logic gates Both a and b Hint0’s and 1’s operations are performed.29). A multiplexers are classified in to ___ number of types? 2 3 4 5 HintEven number.30). A 2by1 type of multiplexer has ___ number of selector lines? 1 2 3 4 Hint2 power n = 2; what is the value of n?31). A 4by1 type of multiplexer has ___ number of selector lines? 1 2 4 3 Hintb-A 4by1 type of multiplexer has 2 number of selector lines32). A 16by1 type of multiplexer has ___ number of selector lines? 1 2 3 4 Hint2 power n = 16; what is the value of n?33). A 8by1 type of multiplexer has ___ number of selector lines? 1 2 3 4 Hint2 power n= 8; what is the value of n?34). How many AND logic gates are required to design a 8by1 multiplexer? 1 3 8 4 Hint‘n’ number.35). How many OR logic gates are required to design a 8by1 multiplexer? 1 2 3 8 HintOdd value.36). Which of the following is the advantage of multiplexer? Minimum wires are required Zero K-maps Less circuit complexity All the above Hint3 advantages.37). Which of the following is the disadvantage of multiplexer? Additional IO ports Complex firmware Single port access at a time All the above Hint3 disadvantages.38). Which of the following are the field of applications of multiplexers? Communication systems Computer memory Telephone network All the above Hint3 and more application fields.39). Which of the following electronic device has single input and multiple output? Multiplexer De-multiplexer Amplifier Both a and c HintA de-multiplexer is an electronic device has single input and multiple output.Multiplexer MCQs for Exams40). Which of the following are the advantages of Demux? AV signal transmission Merging MUX and De-Mux enhances communication Decoder All the above Hint3 advantages. Read more about DeMUX.41). Which of the following are the disadvantages of Demux? Wastage in BW Delays Noise addition All the above Hint3 dis-advantages.42). Which of the following are the applications of De-mux? Communication system ALU Serial to parallel convertor All the above Hint3 applications.43). A mux is a _____ component? Data selector Data destroyer All the above HintA 2by1 mux has one connector.44). A De-mux is a _____ component? Data selector Data distributor Data destroyer All the above HintUsed in digital type circuits.45). A MUX is deployed in ___? Digital switches Digital circuits Analogue circuits All the above HintOn-Off operation.46). ____ type conversion is observed in mux? Serial to Parallel Parallel to Serial Serial to Serial Parallel to Parallel Hint2power n inputs, one output.47). TDM type of mux is used at which end in communication? Transmitter Receiver Both a and b Channel HintSenders end. Read more about TDM.48). A De-MUX is deployed in ___? Digital switches Digital circuits Analogue circuits All the above HintCombination of electronic components.49). Which of the following are the ICs of MUX? 74157 74158 74153 All the above HintOp-amp ICs.50). Which of the following is the function of 74147 IC (MUX)? Quad 2:1 Quad 4:1 8:1 16:1 HintMUX with 2 selector lines. Please fill in the comment box below. Time is Up! Time's up
