Microprocessor 8086

51) the microprocessor or determines whether the specified condition exists or not by testing the _______

Answer Is: (B) condition flag

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52) an____is used to fetch one address.

Answer Is: (A) internal decoder

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53) In pop instruction,after each execution of the instruction,the stack point is

Answer Is: (C) incermented by 2

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54) ____has certain signal requirements write into and raad from its registers.

Answer Is: (A) memory

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55) microprocessor is the_____of the computer and it perform all the computational tasks.

Answer Is: (B) heart

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56) the 1mb byte of memory can be divided into_____segment.

Answer Is: (B) 64kbyte

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57) the biu contains fifo register of size __________

Answer Is: (B) 6

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58) the items that you can physically touch in a computer system are called:

Answer Is: (C) hardware

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59) ______signal is generated by combining rd and wr signals with io/m.

Answer Is: (A) control

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60) the circuits in the 8085a that provide the arythmetic and logic function are called the:

Answer Is: (C) alu

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61) the cf is know as_______

Answer Is: (A) carry flag

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62) microprocessor provides signal like___to indicate the read operation

Answer Is: (C) mcmr

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63) which of the following is not a machine controlled instruction?

Answer Is: (B) clc

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64) the software used to drive microprocessor-based systems is called:

Answer Is: (C) assembly language

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65) the ip is_____bits in length

Answer Is: (C) 16bits

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66) the of is called as______.

Answer Is: (A) overflow flag

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67) the_____pin is used to connect more microprocessor.

Answer Is: (B) cascade

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68) address line for trap is?

Answer Is: (B) 0024h

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69) INC destination increments the content of destination by_______

Answer Is: (A) 1

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70) in 8086microprocessor the address bus is _____ bit wide.

Answer Is: (D) 20bit

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71) the pish source copies a word from source to____

Answer Is: (A) stack

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72) in which year,8086 was introduced?

Answer Is: (A) 1978

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73) the instruction mov ax ,1234h is an example of

Answer Is: (C) immediate addressing mode

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74) the register ax is formad by grouping ________

Answer Is: (A) ah&al

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75) the flag that acts as borrow flag in the instructions,sbb

Answer Is: (B) carry flag

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76) a_____instruction at the end of interrupt services program takes the execution back to the interrupted program.

Answer Is: (B) return

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77) the sf is called as______

Answer Is: (B) sign flag

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78) the microprocessor places_____address on the address bus.

Answer Is: (C) 16bit

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79) the instruction"jump"belongs to

Answer Is: (D) control transfer&branch instructions

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80) the microprocessor can read/write 16bit data from or to _____

Answer Is: (A) memory

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81) the instruction format'register to register' has a length of

Answer Is: (A) 2byts

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82) the ds is called as____

Answer Is: (A) data segment

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83) ale stands for ________

Answer Is: (A) address latch enable

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84) the instruction that enables subtration with borrow is

Answer Is: (C) sbb

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85) the ror instruction rotates the contents of the destination operned to

Answer Is: (B) right

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86) nop instruction introduces

Answer Is: (B) delay

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87) the langth of the one-byte instruction is :

Answer Is: (B) 1bytes

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88) IMUL source is a signed_____

Answer Is: (A) multiplication

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89) the stack point register contains

Answer Is: (C) offset of address of stack segment

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90) the if is called as _______.

Answer Is: (C) interr upt flag

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91) the rd,wr,m/io is the heart of control for a ____mode.

Answer Is: (A) minimum

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92) the r/m field in a machine instruction format specifies

Answer Is: (D) all of the mentioned

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93) the main concerms of the _____are to define a flexible set of commands

Answer Is: (A) memory interface

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94) the mnemonic that is placed before the arithmetic operation is performed is

Answer Is: (D) aad

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95) the instruction that loads the ah register with the lower byte of the flag register is

Answer Is: (C) lahf

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96) the index register are used to hold_______

Answer Is: (A) memory register

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97) the biu prefeches the instruction from memory and store them in_____

Answer Is: (A) queue

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98) __________generate interrupt signal to microprocessing and receive acknowledge.

Answer Is: (B) control logic

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99) the cs register stores instruction ______

Answer Is: (C) codes

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100) the____of the memory chip will identify and select the register for the eprom.

Answer Is: (A) internal decoder

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