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Shift Register Question & Answers

May 17, 2022 By WatElectronics

This article provides 100 multiple choice questions and answers on shift registers for engineering students. These MCQs are available with a hint and appropriate link where the user can get information on relevant topics. The following shift register MCQs are very helpful for beginners, students, and professionals for preparing the exams, quizzes, and interviews by knowing the basics of the shift register concept.

The set of flip-flops (FFs) which are used to store the binary data is called a register. A shift register is a digital circuit including a group of flip-flops where one flip flop output is connected to the next flip flop input. They share a single CLK signal to store the data within the system to move from one place to other.

There are five types of shift registers shift right, shift left, circular, bidirectional, and linear feedback. In shift registers, there are four modes of operation serial in serial out (SISO), serial in parallel out (SIPO), parallel in parallel out (PIPO) and parallel in serial out (PISO) shift registers.

The advantages of shift registers include; shift registers are very fast to use, simple design, data conversion is faster, used to encrypt/decrypt the data, track the data, etc. The main disadvantage of the shift register is; that the output current produced by this register is limited.

The applications of shift registers mainly include; these registers are used to store the data temporarily, transfer the data, used in calculators, computers, etc. By using these registers, adding binary inputs to the microprocessor as it includes a fixed number of input and output pins.

1). Which of the following mode is used as control inputs to a 4-bit universal shift register?

Hint
2). The number of flip-flops in a shift register is dependent upon?

Hint
3). In which mode can we provide data to all the flip-flops simultaneously?

Hint
4). A shift register is a digital circuit that _____________ .

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5). What is a shift register?

Hint
6). What type of register is a shift register?

Hint
7). A shift register is made up of how many flip-flops?

Hint
8). What happens when a shift register is clocked?

Hint
9). A shift register can have __________ data input and __________ data output lines.

Hint
10). A shift register can be used as a ___________-bit register by connecting all the parallel outputs together and applying the same input to all the parallel inputs.

Hint
11). Which among the following is the main advantage of using a shift register?

Hint
12). Which of the following type of shift register is used in 8085 microprocessor?

Hint
13). Which of the following is true about shift registers?

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14). Which of the following is not a characteristic of universal shift registers?

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15). Which of the following shift registers can be used as both PISO and SIPO?

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16). What is the difference between a SISO, SIPO and PISO shift register?

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17). What is one of the main functions of a shift register?

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18). Which of the following shift registers are also called universal shift registers?

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19). A ________ is a group of special circuit with their outputs connected in series to form a register.

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20). What are the two basic types of shift registers?

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21). A shift register is essentially a group of flip-flops, so what can they be used for?

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22). Which of the following statements about shift registers is true?

Hint
23). Why would you use a shift register?

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24). What types of functions can a shift register perform?

Hint
25). What is the difference between a serial and parallel shift register?

Hint

Shift Register MCQs for Exams

26). Which of the following is correct about serial in/serial out shift register?

Hint
27). Which type of shift register is used to implement a digital up-down counter?

Hint
28). Shift register is a___?

Hint
29). How many stages are in a 74LS170 parallel-out, serial-in shift register?

Hint
30). Which of the following is a serial-in, parallel-out shift register?

Hint
31). Which of the following is a disadvantage of shift registers?

32). Which of the following is a advantage of shift registers?

Hint
33). The maximum clock frequency of the 74HC595 shift register is?

Hint
34). A shift register with a feedback function is useful in _______applications?

Hint
35). Which of the following statements are TRUE regarding shift registers?

Hint
36). What is serial in parallel out (SIPO) shift register?

Hint
37). Which of these is not true about shift registers?

Hint
38). Which of the following terms describes a shift register’s ability to cycle its data within itself, thus acting as memory?

Hint
39). Which of the following is a reason SIPO registers might be attached to the output of microprocessors?

Hint
40). What is a SIPO register?

Hint
41). Shift registers can also be used as:

Hint
42). Does a parallel-in serial-out (PISO) shift register configuration have the data input on lines D1 through D4 in parallel format, D1 being the ....bit?

Hint
43). To write the data to the register, what must the Write/Shift control line be held?

Hint
44). What are the advantages of using a SIPO shift register?

Hint
45). Which of the following are true about a SIPO Shift Register?

Hint
46). In a Serial Input Serial Output, how is data is shifted?

Hint
47). What is the first step in designing a serial-in/serial-out shift register?

Hint
48). What is the difference between a series input (SI) and a parallel input (PI)?

Hint
49). How the data is stored in a SISO shift register?

Hint
50). Which of the following digital circuit can store a bit of data and shift it left or right?

Hint

Shift Register MCQs for Interviews

51). Which of the following is used to create a circular buffer?

Hint
52). Which of the following digital circuit is used to make a shift clock?.

Hint
53). The most common type of shift register is?.

Hint
54). A shift counter can be created by using______?

Hint
55). A shift register chain can be created by using______ .

Hint
56). Which of the following is used to create a shift register ladder?

Hint
57). A shift register is a______ .

58). A shift register can be used to _____ .

59). The most common type of shift register is the__________ .

Hint
60). In a shift register, the output of each stage is the ?

Hint
61). A shift register can be used to?

Hint
62). What is the effect of a left shift operation on a binary number?

Hint
63). What is the purpose of a bidirectional shift register?

Hint
64). What is the effect of a right shift operation?

Hint
65). What is a Ring counter?

Hint
66). What is a Johnson counter?

Hint
67). What is a ring counter?

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68).What is the main advantage of a ring counter over a binary counter?

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69). Johnson counter is an example of which type of sequential circuit:

Hint
70). Which of the following counters is known as 2-bit Johnson Counter?

Hint
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