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Flip Flops Question & Answers

May 18, 2021 By WatElectronics

This article lists 100 Flip Flop MCQs for engineering students. All the Flip Flop Questions & Answers given below includes solution and link wherever possible to the relevant topic.

In a sequential circuit design, flip-flops are the basic building blocks. In a short or in a very simple way we can say that flip flop is on and off. The sequential circuit is generally a combinational circuit with memory. The flip flop stores only binary data that has two states are logic 1 and logic 0. The set-reset, JK, delay, and trigger or toggle are the most commonly used flip flops.

The multiplexer is an example of a combinational circuit and the flip flop is an example of a sequential circuit. The combinational circuit doesn’t have a memory unit whereas the sequential circuit has a memory unit.

The first flip flop was invented by F.W.Jordan and William Eccles. The Delay flip flop converts into other flip flops in three ways they are D to JK, T, and SR flip flop. The type of operation performed by flip flops is synchronous and the type of operation performed by latches is asynchronous.

The flip flops require more area and more power compared to latches. The toggle or trigger flip flop convert to other flip flops in three ways they are T to JK, SR, and D flip flop. The flip-flops store only one bit of information. The required flip flop in T to D flip flop conversion is D flip flop, and the required flip flop in JK to D flip flop conversion is D flip flop.

1). The output of the sequential circuit depends upon _________

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2). The flip flops are categorized into ________

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3). What is the standard form of S-R flip flop?

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4). When the set is enabled in S-R flip flop then the output will be __________

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5). When the set is disabled and reset is enabled in S-R flip flop then the output will be __________

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6). When both set and reset are disabled in S-R flip flop then the output will be __________

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7). When both set and reset are enabled in S-R flip flop then the output will be __________

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8). In which flip flop the present input will be the next output?

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9). The J-K flip flops has ___________ memory

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10). The preset input is used to make output ______

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11). The clear input is used to make output ______

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12). The preset and clear inputs don’t need synchronization?

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13). When preset=0, clear=1 then the output will be ________

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14). When preset=1, clear=0 then the output will be ________

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15). There are total ______ steps for flip flop conversions

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16). In SR to JK flip flop conversion which one is an available flip flop?

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17). In SR to JK flip flop conversion which one is a required flip flop?

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18). The shift registers are categorized into ________

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19). How many possible conversions are there to convert SR flip flop to other flip flops?

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20). A flip flop is an __________

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21). The operation of the flip flop is slow?

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22). How many types of latches are there?

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23). The flip flop requires _________

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24). _________ are the applications of flip flop

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25). Does the flip flop based on enable function input?

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Flip-Flops Important Questions with Hints

26). The flip flops works with ________

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27). The flip flop can’t be used as a register is it true?

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28). What is the standard form of T flip flop?

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29). The JK flip flop convert to other flip flops in ________?

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30). How many types of triggers are there?

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31). When S=0, R=0, CLK=X then the output will be ___________

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32). When reset is low and set is high in a NOR D-latch table then the output will be __________

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33). When reset is high and set is low in a NOR D-latch table then the output will be __________

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34). When reset is high and set is low in a NAND D-latch table then the output will be __________

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35). When reset is low and set is high in a NAND D-latch table then the output will be __________

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36). Which circuit doesn’t have a memory unit?

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37). ________ is an example for sequential circuit

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38). _______ is an example for combinational circuit

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39). How many possible conversions are there to convert T flip flop to other flip flops?

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40). What is the standard form of D flip flop?

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41). How many inputs does the RS latch have?

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42). When triggers on high clock level then this type of trigger is known as ________

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43). When triggers on low clock level then this type of trigger is known as ________

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44). The flip flops require ________

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45). The type of operation performed by flip flop is _______

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46). The type of operation performed by latches is _______

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47). The flip flop is a _______ device

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48). In which year the first flip flop was invented?

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49). How many possible conversions are there to convert D flip flop to other flip flops?

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50). Who invented first flip flop?

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Read more about Flipflops

Flip-Flops Important Questions for Engineering Students

51). The set-reset flip flops constructed by cross-coupling of ______ gates

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52). The sequential circuits are categorized into _______

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53). How many inverters does the basic latch consists of?

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54). How many additional AND gates does SR flip flop consists of?

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55). The J-K flip flop characteristic similar to _________ flip flop

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56). The latch is a __________ device

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57). When toggle condition occurs in JK flip flop?

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58). The no-change conditions occur when ________ in JK flip flop

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59). The flip flop are categorized into _______ types

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60). How many outputs does D-flip flop have?

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61). When the clock input is low in a D flip flop then the input of the D flip flop is _______

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62). When the clock input is high and D input is high then the output of a D flip flop will be _______

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63). The combinational circuit have ____________ number of stable states

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64). How many inputs does D flip flop have?

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65). The flip flops are activated by _____________ trigger

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66). The RS flip flop input clock is given to _______

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67). How many NAND gates does the D flip flop circuit consists of?

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68). The inputs of the SR, JK, and D flip flop are the _____ inputs

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Read more about Gates
69). The counters are categorized into ______

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70). How many states does the decimal counter have?

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71). The synchronous counter is one type of _______ counter

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72). The BCD is one type of counter which is also known as __________

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73). The counter circuit parallel outputs represent _________

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74). How many of states are there in a 4 bit counter?

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75). An IC 7493 is a______ bit binary ripple counter

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Flip-Flops Important Questions for Interviews

76). How many JK master-slave flip flops are required for IC 7493?

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77). Which IC is a decade counter?

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78). How many pins does ripple counter IC have?

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Read more about Counters
79). __________ type of counter counts in an upward manner

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80). In which manner does down counter count?

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81). The high-speed counter is a __________ type of counter

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82). The another name for fundamental mode is ____________

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83). Is it true that the up-down counter is a combination of latches and flip-flops?

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84). How many of states are there in a 3 bit counter?

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85). Which one is also called as a multimode counter?

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86). __________ is a truncated modulus example

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87). Is register is a type of combinational circuit?

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88). What is the standard form of SISO?

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89).What is the standard form of PIPO?

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90). The Johnson and ring shift counters are _________ type of counters

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91). Does an IC 74HC195 use for all SISO, PIPO, SIPO, and PISO operations?

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92). How many bits of information do flip-flop store?

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93). The very large scale integration chip is made up of _______

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94). How many of states are there in a 2 bit counter?

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95). What is the standard form of SOSI?

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96).What is the standard form of POSI?

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97). Read-only memory consists of _______ arrays

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98). What is the available flip flop in T to D flip flop conversion?

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99). What is the required flip flop in T to D flip flop conversion?

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100). What is the required flip flop in JK to D flip flop conversion?

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