1. The process of fetching and executing instructions,one at a time, in order of increasing addreses is called

2. Digital circuits can be made by the repeated use of _________

3. 2's Complement of 10101011 is

4. The addressing mode used in the instruction PUSH B is

5. DeMorgan’s first theorem shows the equivalence

6. In 2’s complement representation, the number 11100101 represents the decimal number _______

7. Both the CISC and RISC architectures have been developed to reduce the ______

8. What does the below diagram represent?

9. Which of these sets of logic gates are designated as universal gates?

10. In a T flip-flop no of input circuit is

11. To put the microprocessor in the wait state

12. A positive AND gate is also a negative

13. How many AND gates are required to realize Y = CD+EF+G

14. What are the states of the Auxiliary Carry (AC) and Carry Flag (CY) after executing the following 8085 programs?

MVI A, FFH

MVI B, OIH

MOV H, A

ADD B

15. Decimal 43 in hexadecimal and BCD number system is respectively____ and ____

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

17. Decimal number 10 is equal to binary number ________

18. The hexadecimal number (3E8)₁₆ is equal to the decimal number ______

19. What do minuend and subtrahend denote in a subtractor?

20. Convert the binary number (1111000011110000) to a hexadecimal number

21. -8 is equal to signed binary number

22. Computer component which is fastest is

23. In an intel 8085A microprocessor, why is READY signal used?

24. Which of the memory is volatile memory ?

25. What is the function of an enable input on a multiplexer chip?

26. The programmable interval timer is

27. What are the states of the Sign Carry (S) and Parity Flag (P) after executing the following 8085 programs?

MVI A, OOH

MVI B, OIH

SUB B

28. The memory access speed is measured in

29. The simplification of the Boolean expression is

30. It is possible for an enable or strobe input to undergo an expansion of two or more MUX ICs to the digital multiplexer with the proficiency of large number of ___________

31. The number of output pins of a 8085 microprocessor are

32. Which of the following is a set of general purpose internal registers ?

33. The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following?

34. In a multiplexer the output depends on its __________

35. What will be the value of the accumulator after executing the following command? SBI 37H borrow = 1, A=37H

36. What will be the value of the accumulator after executing the following instructions

MVI A, 49H

MVI C, 12H ORA C

37. Assume that, SS=3000 H, BP=0010 H, SI=0040 H Find the physical address in following instruction. MOV AL, [BP+SI]

38. Total number of inputs in a half adder is __________

39. If A, B and C are the inputs of a full adder then the sum is given by __________

40. Which IC is used for the implementation of 1-to-16 DEMUX?

41. If two inputs are active on a priority encoder, which will be coded on the output?

42. Convert decimal 153 to octal. Equivalent in octal will be

43. How many buses are connected as part of the 8085A microprocessor?

44. If A and B are the inputs of a half adder, the sum is given by __________

45. In a generic microprocessor instruction cycle time is

46. Looping on a K-map always results in the elimination of

47. In a virtual memory system, the address space specified by the address lines of the CPU must be _______ than the physical memory size and _______ than the secondary storage size.

48. The differences between PLA and ROM is

49. Which stack is used in 8085 ?

50. A D-flip-flop is said to be transparent when

51. Which of the architecture is power efficient?

52. For subtracting 1 from 0, we use to take a _______ from neighboring bits

53. he basic storage element in a digital system is ______

54. Which are the processors based on RISC?

55. A combinational circuit that selects one from many inputs are ____________

56. Which of the following is/are advantages of virtual memory ?

57. Output of a logic gate is 1 when all its inputs are at logic 0. the gate is either

58. The ability to temporarily halt the CPU and use this time to send information on buses is calle

59. Cache memory acts between

60.  In 8085, multiplication is done by

61. Computers invariably use RAM for __________

62. The unit of a computer system which executes program, communicates with and often controls the operation of other subsystems of the computer is the

63. How many flip-flops are required to construct a decade counter

64. Which of the following is not a form of memory ?

65. Most demultiplexers facilitate which type of conversion?

66. The 16-bit flag of the 8086 microprocessor is responsible to indicate ___________

67. Consider the following

I) Sign flag

II) Trap flag

III) Parity flag

IV) Auxiliary carry flag

Which one of the above flags is/are present in the 8085 microprocessor?

68. Which combinational circuit is renowned for selecting a single input from multiple inputs & directing the binary information to output line?

69. The ALU of a computer normally contains a number of high speed storage elements called

70. How many AND gates are required for a 1-to-8 multiplexer?

71. The CISC stands for ___________

72. How many RAM chips of size (256K x 1 bit) are required to build 1M Byte memory?

73. _____ subsystem that transfers data between computer components inside a computer or between computers:

74. Find the status of CF, SF, and AF after the following instructions are executed.

MOV AL, 35 H

ADD AL, 0CE H

75. ALU (Arithmetic and Logic Unit ) of 8085 microprocessor consists of