Asynchronous Counter Question & AnswersMay 3, 2022 By WatElectronics This article lists 75 Asynchronous Counter MCQs for engineering students. All the Asynchronous Counter 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 on their fundamentals on Asynchronous Counter.Counters are defined as a number of events or processes that occurred in presence of clock timings. There exist two types of basic counters asynchronous counters and synchronous counters. Counters whose output is unoccupied by applying different clock signals are called Asynchronous counters. The number of logic gates required to design it is very less. The alternative name for asynchronous counters is Ripple counters. Flip flops used in asynchronous/ripple-counters depend upon a number of states of the counter and the output of its states is called Modulus or MOD of the counter.The highest number of states used by the counter is 2n, where n is represented by the number of flip flops used in the counter. Example: If we use 2 Flip flops, then the number of states at the output of the counter is 4. i.e, 2*2=4.It is also called Modulus-4 or MOD-4 Counter. There are many types of Asynchronous/ripple counters like Up counter, Down counter, Ripple Up/Down Counter, and Ripple BCD counter.Up counter: Ripple counter starts the count from 0 to maximum range n. n depends upon the number of FFs used. Ripple Up counter can be built using D and T flip flops. Design differs based on the type of Flip flops used in the circuit. Toggling will be the same in both D and T flip-flops.Down Counter: Ripple Down counter starts the count from the maximum possible range to 0 and resets back from the maximum count. The design is the same as the Up counter the only difference is toggling in D and T flip flops differs. The output of each flip flop will be given as input to succeeding flip flops. So that it activates the counter to count from backward. Up/Down Counter: This counter can do both Up and Down counting based on the type of mode select switch. When the mode switch is high, then the counter will count up whereas when the mode switch is low, then the counter will count down. Here we use 2*1 MUX to select two clock signals.Asynchronous BCD Counter: The Asynchronous BCD Counter is the same as the Asynchronous Up counter, when the count reaches the decade it resets to zero flip flops.1). Counters defines the combination of ________ data. Digital Automated Cybernated Programmed HintBinary format.2). How many types of counters exist? Three Four Five Two HintPaired.3). Other name for Asynchronous counters is _______counters. Ripple Up counters Down counters Modulus HintWavelet parameter.4). Asynchronous counters are_______ to design. Difficult Moderate Simple Tough HintQuick changes can be done to the design.5). Number of logic gates required to design asynchronous counters are? More Less Moderate None of the above HintLow.6). Flip flops in Asynchronous/Ripple counters are supplied with ______ clock signals. Different Same Moderate None of the above HintIncompatible.7). Flip flops depends on number of ______? Values Digits States Signals HintPositions/Conditions.8). The output states of ripple counter are called______ counter. Modulus Synchronous Asynchronous Server HintNon simultaneous.9). Modulus can also be written as ______ counter. MOD DOM COUNT MODBUS HintMOD=modulus.10). Maximum number of states available in counters are? n+1 n n-1 2n HintMultiples.11). Number of flip flops used in the counter are represented by___? m n a b HintMultiple.12) How many flip flops produce the output 4 at the counter. 1 2 3 4 HintEven number.13). Modulus-4 counter is represented as ______. MOD-4 DOM-4 DOL-4 COM-4 HintModulus = MOD14). Which of the following are the types of Asynchronous counters available? Asynchronous 4-bit UP counter Asynchronous 4-bit DOWN counter Asynchronous 4-bit UP/DOWN counter All of the above Hint3 types.15). Which of the following circuit is responsible for driving the counter circuit with delay _____? Propagation delay Ripple counter Modulus Clock ripple HintTime wavelet.16). Asynchronous counters are designed with______ type of flip flops. T SR JK None of the above HintHas one input and output.17). D-flip flops are used to design ______ counters. Asynchronous Decade Synchronous Decade Asynchronous Synchronous HintSimultaneous.Asynchronous Counter Quiz Questions and Answers.18). Ripple counters are used in_____ circuits. Low speed High speed Moderate Least level HintLess.19). Asynchronous counters are used as_______ counters. Divide by zero Divide by n Divide by 1 Divide by n+1 HintBy multiples.20). ________ counters are used to design any MOD number of counters. Truncated Clock ripple Delay Propagation Synchronous HintShortened.21). Counting error occurs due to ______ propagation delay. Small Medium Large Least HintNo output observed.22). Asynchronous counters are used in _____ counters. Asynchronous Decade Synchronous Decade Ring counters Synchronous counters HintClosed.23). Asynchronous counters are used in _____ quantity noise emission. High Low Medium Null HintHigher efficiency.24). Which of the following is the reason for requirement of more flip flops in Asynchronous counters for? Synchronization Re synchronization High propagation delay Clock ripple HintPose multiple operation.25). MOD 3, MOD 5, MOD 7 counters are all ______ type of counters. Even Multiple Odd Single Hint1,3,5,7.... are ___ numbers.26). Always propagation delays are represented by_____ lines. Black Brown Blue White HintVIBGYOR- third one27). Clock ripple is used as a_______ counter. Significant Insignificant Reliable Temporary HintWell founded.28). Asynchronous/Ripple counters are also used in _____ applications. High power Low power Medium Short delay HintLess.29). Ripple counters are also used to design _____ counters. Asynchronous Decade Synchronous Decade Ring counters Synchronous counters HintTen counter.Asynchronous Counter Interview Questions and Answers30). Ripple counters are also used in ____ counters. Modulus Asynchronous Decade Ring counter Johnson counters HintAlternative name for asynchronous counter.31). Asynchronous counter can have _______ counting states. 2^n-1 2n 2n-1 2n+1 Hint〖(2〗^n-1)232). When Modulo-16 asynchronous counter is modified by decade then it is referred as____ counter. Decade Ripple Asynchronous Synchronous HintTen also called?33). J-K flip flop multi-vibrators set up for the______ mode. 0 1 Toggle Infinity HintSwitch.34). Four bit sequence toggles between 1 and _____. Infinity 1 2 0 HintNull value35). Ripple effect is seen in______ circuits. Binary Adder Full adder Subtractor Binary Multiplier Hint0/1 adding.36).In ______ circuits common problem of ripple effect is also observed. Data transfer Data retrieving Data conversion None of the above HintChanging information. Read more aboutBinary Adder and Subtractor Circuits..37). The output bits will ripple in sequence from ____. LSB to MSB LSB to 0 LSB to 1 LSB to infinity HintLHR=RHS38)._________ is a technique deployed to gain the output of an asynchronous/ripple counter. Ripple effect Strobing Triggering Counting HintBlinking/pulsating39). Ripple counter circuit is_________ to design. Difficult Simple Tough None of the above HintNot difficult.40). Which of the following is the output frequency for 1-bit asynchronous/ripple counter will be__________? f f/2 f %2 1/2f Hintf/1+141). Output frequency for 2-bit asynchronous/ripple counter will be_______? f/2 f /4 f 1/4f Hintf/2*242). Put M=1 and M^'=0 in Y= M’Q + MQ’, then the output will be? Q 2Q^' Q^' 2/Q^' HintNegative value.43). Asynchronous decade counter has _____ number of JK Flip-flops. 2 3 4 6 Hint2*2?44). Decade counter has 4 JK flip flops and_____ number of logic gates. NAND AND OR NOT HintIf a=1, b=1 then y=0(output)45). NAND gate in decade counter is represented as _____ IC? 74LS10D 74LS11D 74SL10D 74SL01D HintICs with decade counter.46). Decimal value of 1001 is___? 5 6 7 9 Hint1000+147). Binary number of decimal value 7 is______? 1000 0101 0110 0111 Hint0110+1.48). Decimal value of binary number 0011 is____? 1 2 3 4 Hint0010+1=?49). Binary value of 6 is represented by______? 0011 0110 0101 0111 Hint0101+1=?50). When decade counters output reaches to decimal value 9 then the counters are _____ to zero. Move Constant Reset Stop HintRestart.51). Abbreviation of BCD is____? Binary Coded Decimal Binary Counter decimal Bit Coded Decimal Binary Coded Decoder HintDecimal with binary values.52). 3-bit flip flop arrangement counter can have___ falling edges. 7 8 9 6 HintCube of 2.53). Number of states depends on number of _____________ occupied in the circuit. Counters Timers Flip flops Decoders HintTurn about 0/1 or 1/0.54). Designing of counters depends upon types of _______ component used. Counters Timers Flip flops Decoders HintTurn about 0/1 or 1/0.55). Which of the following is the range of Asynchronous/Ripple counter, counting range? 1 to maximum range 2 to maximum range 0 to maximum range 3 to maximum range HintMaximum coverage range.Asynchronous Counter MCQs for Exams56). Which of the following parameter is the major difference between Up and down counter flip flop? Toggling Increasing Decreasing Static HintSwitching. Read more about Digital Counter .57). In up-counter, we use positive edge flip flops which are represented by____? 2Q ̅ Q ̅ Q ̅/2 Q ̅/4 HintNegative value.58). In down counter we use Q as ______? Flip flop Counters States Clock signal HintTimer.59). Up/down counter works depending upon the _____ switch. Low High Select None of the above HintShortlisting.60). Up and down counters use _____ with clock signals. 1*3 MUX 2*1 MUX 1*2 MUX 1*1 MUX Hint(1+1)*161). Asynchronous BCD counter is same as Ripple ____ counter. Up/Down Up Down Decade HintRaise-up.62). To count the truncated counters sequence, additional _____ logic is needed. Active Inactive Feedback None of the above HintResponse.63). For designing BCD counter ____ number of T-flip flops are required. 3 4 5 2 Hint2*2?64). Delay of next flip flop is added to the sum of individual flip flops are known as _________. Ripple clock Propagation delay Ripple BCD Decade propagation HintTransmission delay.65). The operation of Up/down counter is very ____ than up counter. Fast Immediate Static Slow HintDelay in operation od Up/down counter.66). Down counter is quick than _______ counter. Ripple counter BCD counter Clock ripple Up/Down counter HintWhich counts in both directions.67). Because of additional propagation delay added to _____ gate, up/down becomes slower. NOR AND OR NAND HintIf a=1, b=1 then y=0(output).68). In clock ripple, at clock pulse 8 the output should change from 11102 to _____. 00012 00120 00002 00001 Hint99090-1110269). If present count=3, then the next count will be____ using down counter. 2 5 4 6 HintSum of count-1.70). 4-bit down counter counts from_____. 15 to 1 0 to 15 2 to 15 15 to 33 HintDescending order.71). If present count=3, then the next count will be____ using up counter. 2 5 4 6 HintSum of count+172). In asynchronous 4-bit up counter with d- flip flop it counts from 0 to ___. 11 10 12 15 HintPreceding number of 16.73). Asynchronous counter is also known as_____ counter. Parallel Serial Hybrid None of the above HintSide-by-side.74). ____________ are produced in asynchronous counter. Decoding errors Encoding Difference Delays HintInaccuracy.75).______________ is fixed in asynchronous counter. Count sequence Ripple clock Decade count Counting errors HintTotal order.For More MCQsSynchronous Counter Question & Answers Please fill in the comment box below. Time is Up! Time's up
