MCQ quiz on digital electronics multiple choice questions and answers on digital electronics objective question and answer to prepare for technical entrance test and competitive exams.

1. What are the symbols used to represent digits in the binary number system?

2. The sum of 11101 + 10111 equals ________.

3. A binary number's value changes most drastically when the ________ is changed.

4. The binary number 111 is equal to the decimal number ________.

5. Hexadecimal letters A through F are used for decimal equivalent values from:

6. Digital electronics is based on the ________ numbering system.

7. The 1's complement of 10011101 is ________.

8. When using the repeated division by 2 method of converting from decimal to binary, one must write the first remainder as the:

9. The decimal value for E

10. Solve this binary problem: 01110010 – 01001000

11. Which of the following is the most widely used alphanumeric code for computer input and output?

12. Which is typically the longest?

13. The BCD number for decimal 347 is ________.

14. The sum of the two BCD numbers, 0011 + 0011, is ________.

15. Convert the binary number 1100 to Gray code.

16. Convert binary 111111110010 to hexadecimal.

17. When used with an IC, what does the term "QUAD" indicate?

18. Convert decimal 64 to binary.

19. Convert Hexadecimal 8B3F to binary

20. Convert the Gray code 1011 to binary.

21. Add the binary number 1011 and 1101

22. Add the binary numbers 1010.1101 and 101.01

23. Which one of the following will give the sum of full-adder as output?

24. Boolean logic is concerned with

25. Perform the subtraction of 1011 and 0110

26. Perform the subtraction of 1110 and 1001

27. Which one of the following is equivalent to AND-OR realization?

28. Full adder can be changed into full subtractor circuit by adding one

29. The output of an AND gate is LOW ________.

30. The output of a NOT gate is HIGH when ________.

31. The output of an OR gate is LOW when ________.

32. The Ex-NOR is sometimes called the ________.

33. A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):

34. The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.

35. When used with an IC, what does the term "QUAD" indicate?

36. The output of an OR gate with three inputs, A, B, and C, is LOW when ________.

37. Which of the following logical operations is represented by the + sign in Boolean algebra?

38. Output will be a LOW for any case when one or more inputs are zero for a(n):

39. A basic multiplexer principle can be demonstrated through the use of a:

40. One multiplexer can take the place of:

41. The inputs/outputs of an analog multiplexer/demultiplexer are:

42. One application of a digital multiplexer is to facilitate:

43. How many select lines would be required for an 8-line-to-1-line multiplexer?

44. Which of the following is correct for a gated D-type flip-flop?

45. Which of the following describes the operation of a positive edge-triggered D-type flip-flop?

46. Which of the following is correct for a D latch?

47. A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states?

48. A positive edge-triggered D flip-flop will store a 1 when ________

49. If an input is activated by a signal transition, it is ________

50. A basic S-R flip-flop can be constructed by cross-coupling which basic logic gates?

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