DSD viva questions 1. Examples on conversion between number systems(binary, octal and hexadecimal) 2. Given two binary numbers, perform subtraction using 2’s complement method. 3. Given a expression, solve the expression using boolean laws. 4. Given a SOP form or minterm, solve using k-map. 5. What is a minterm and maxterm. 6. Why minterm is called as minterm? And why maxterm is called as maxterm? 7. What are don’t care conditions? 8. What are the applications of gray codes 9. What do you mean by universal gate. 10. Implement basic gates using universal gates 11. What is ttl logic and cmos logic 12. Which ics do you use in DSD lab(ttl or cmos)?why? 13. Difference between Mealy and Moore state machine? 14. What is half adder,full adder,half subtractor, and full subtractor? 15. Design full adder using half adder 16. Design full subtractor using half subtractor 17. Implement 4 bit parallel adder 18. Design BCD adder. 19. What is the drawback of ripple carry adder? How to overcome the drawback? 20. Implement 2-bit magnitude comparator? 21. Implement 4-bit magnitude comparator? 22. What is a multiplexer? state the applications 23. What is a demultiplexer? 24. Implement 8:1 mux using 4:1 mux 25. What is an encoder?what are the applications 26. What is a decoder? what are the applications 27. What is a priority encoder? Explain the operation. 28. What is a combinational circuit? 29. What is a sequential circuit? 30. what is the clock? 31. Which is the basic unit of sequential circuit? 32. What is a flip-flop? 33. What is the difference between a latch and a flip-flop? 34. Draw the circuit for sr latch? 35. Explain the working of sr latch 36. Explain jk flip flop 37. What is the difference between sr latch and jk latch? 38. What is a race around condition? 39. How to avoid race around condition? 40. Which are the triggering methods 41. Explain master slave flip flop 42. Write a truth table of sr,d,jk and t flip-flop? 43. Write a characteristic equation for the flip flop 44. Write the excitation table for the flip flop 45. Convert one flip to other (eg. SR to T) 46. What are registers. 47. What is a shift register? Explain the applications

48. Name the types of shift registers 49. In SISO resistor how many input cycles are required? 50. In PISO resistor how many input cycles are required? 51. In PIPO resistor how many input cycles are required? 52. In SIPO resistor how many input cycles are required? 53. Explain universal shift register 54. what is counter? 55. Explain ripple counter 56. What is an asynchronous counter and synchronous counter 57. Design 2 bit ripple counter 58. Design 3 bit synchronous counter 59. What is a mod counter 60. Explain ripple counter 61. Explain lock out condition in a counter 62. Design a mod counter 63. What is a state diagram 64. What is a state table 65. Explain Johnson counter 66. What is a ring counter 67. How many flip-flops are required to make a MOD-32 binary counter? 68. List the types of semiconductor memory 69. What is programmable logic array? 70. What is programmable array logic? 71. What are programmable logic devices?