8085 Microprocessor MCQs : This section focuses on the "8085 Microprocessor". These Multiple Choice Questions (MCQs) should be practiced to improve the 8085 Microprocessor skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Eight of the register are known as:
A. general- purpose register
B. pointer or index registers
C. segment registers
D. other register
Question 2
IP Stand for:
A. instruction pointer
B. instruction purpose
C. instruction paints
D. none of these
Question 3
CS Stand for:
A. code segment
B. coot segment
C. cost segment
D. counter segment
Question 4
DS Stand for:
A. data segment
B. direct segment
C. declare segment
D. divide segment
Question 5
The acculatator is 16 bit wide and is called:
A. ax
B. ah
C. al
D. dl
Question 6
How many bits the instruction pointer is wide:
A. 16 bit
B. 32 bit
C. 64 bit
D. 128 bit
Question 7
How many type of addressing in memory:
A. logical address
B. physical address
C. both a and b
D. none of these
Question 8
The size of each segment in 8086 is:
A. 64 kb
B. 24 kb
C. 50 kb
D. 16kb
Question 9
The pin configuration of 8086 is available in the________:
A. 40 pin
B. 50 pin
C. 30 pin
D. 20 pin
Question 10
DIP stand for:
A. deal inline package
B. dual inline package
C. direct inline package
D. digital inline package
Question 11
EA stand for:
A. effective address
B. electrical address
C. effect address
D. none of these
Question 12
BP stand for:
A. bit pointer
B. base pointer
C. bus pointer
D. byte pointer
Question 13
DI stand for:
A. destination index
B. defect index
C. definition index
D. delete index
Question 14
SI stand for:
A. stand index
B. source index
C. segment index
D. simple index
Question 15
ALE stand for:
A. address latch enable
B. address light enable
C. address lower enable
D. address last enable
Question 16
NMI stand for:
A. non mask able interrupt
B. non mistake interrupt
C. both
D. none of these
Question 17
The offset of a particular segment varies from _________:
A. 000h to fffh
B. 0000h to ffffh
C. 00h to ffh
D. 00000h to fffffh
Question 18
Which are the factor of cache memory:
A. architecture of the microprocessor
B. properties of the programs being executed
C. size organization of the cache
D. all of these
Question 19
________ is usually the first level of memory access by the microprocessor:
A. cache memory
B. data memory
C. main memory
D. all of these
Question 20
Microprocessor reference that are not available in the cache are called_________:
A. cache hits
B. cache line
C. cache misses
D. cache memory
Question 21
Which causes the microprocessor to immediately terminate its present activity:
A. reset signal
B. interupt signal
C. both
D. none of these
Question 22
Which is responsible for all the outside world communication by the microprocessor:
A. biu
B. piu
C. tiu
D. liu
Question 23
INTR: it implies the__________ signal:
A. intrrupt request
B. intrrupt right
C. intrrupt rongh
D. intrrupt reset
Question 24
Which is the microprocessor comprises:
A. register section
B. one or more alu
C. control unit
D. all of these
Question 25
What is the store by register?
A. data
B. operands
C. memory
D. none of these
Question 26
The language that the computer can understand and execute is called
A. machine language
B. application software
C. system program
D. all of the above
Question 27
Accumulator based microprocessor example are:
A. intel 8085
B. motorola 6809
C. a and b
D. none of these
Question 28
Which of the following is used as a primary storage device?
A. magnetic drum
B. prom
C. floppy disk
D. all of these
Question 29
A set of register which contain are:
A. data
B. memory addresses
C. result
D. all of these
Question 30
The memory which is programmed at the time it is manufactured
A. prom
B. ram
C. prom
D. eprom
Question 31
Which of the following memory medium is not used as main memory system?
A. magnetic core
B. semiconductor
C. magnetic tape
D. both a and b
Question 32
There are primarily two types of register:
A. general purpose register
B. dedicated register
C. a and b
D. none of these
Question 33
Name of typical dedicated register is:
A. pc
B. ir
C. sp
D. all of these
Question 34
One of the main feature that distinguish microprocessors from micro-computers is
A. words are usually larger in microprocessors
B. words are shorter in microprocessors
C. microprocessor does not contain i/o devices
D. exactly the same as the machine cycle time
Question 35
The first microprocessor built by the Intel Corporation was called
A. 8008
B. 8080
C. 4004
D. 8800
Question 36
Which is used to store critical pieces of data during subroutines and interrupts:
A. stack
B. queue
C. accumulator
D. data register
Question 37
The data in the stack is called:
A. pushing data
B. pushed
C. pulling
D. none of these
Question 38
Most important advantage of an IC is its
A. easy replacement in case of circuit failure
B. extremely high reliability
C. reduced cost
D. low powers consumption
Question 39
The external system bus architecture is created using from ______ architecture:
A. pascal
B. dennis ritchie
C. charles babbage
D. von neumann
Question 40
Which of the following items are examples of storage devices?
A. floppy / hard disks
B. cd-roms
C. tape devices
D. all of the above
Question 41
The processor 80386/80486 and the Pentium processor uses _____ bits address bus:
A. 16
B. 32
C. 36
D. 64
Question 42
Which is the type of memory for information that does not change on your computer?
A. ram
B. rom
C. eram
D. rw / ram
Question 43
Which is not the control bus signal:
A. read
B. write
C. reset
D. none of these
Question 44
Before a disk can be used to store data. It must be…….
A. formatted
B. reformatted
C. addressed
D. none of the above
Question 45
PROM stands for:
A. programmable read-only memory
B. programmable read write memory
C. programmer read and write memory
D. none of these
Question 46
A typical personal computer used for business purposes would have… of RAM.
A. 4 kb
B. 16 k
C. 64 k
D. 256 k
Question 47
EPROM stands for:
A. erasable programmable read-only memory
B. ectrically programmable read write memory
C. electrically programmable read-only memory
D. none of these
Question 48
The word length of a computer is measured in
A. bytes
B. millimeters
C. meters
D. bits
Question 49
Each memory location has:
A. address
B. contents
C. both a and b
D. none of these
Question 50
Which is the type of microcomputer memory:
A. processor memory
B. primary memory
C. secondary memory
D. all of these
Question 51
Secondary memory can store____:
A. program store code
B. compiler
C. operating system
D. all of these
Question 52
Secondary memory is also called____:
A. auxiliary
B. backup store
C. both a and b
D. none of these
Question 53
Can you tell what passes into and out from the computer via its ports?
A. data
B. bytes
C. graphics
D. pictures
Question 54
The RAM which is created using bipolar transistors is called:
A. dynamic ram
B. static ram
C. permanent ram
D. ddr ram
Question 55
The secondary storage devices can only store data but they cannot perform
A. arithmetic operation
B. logic operation
C. fetch operations
D. either of the above
Question 56
Which type of RAM needs regular referred:
A. dynamic ram
B. static ram
C. permanent ram
D. sd ram
Question 57
Which of the following memories has the shortest access times?
A. cache memory
B. magnetic bubble memory
C. magnetic core memory
D. ram
Question 58
Which RAM is created using MOS transistors:
A. dynamic ram
B. static ram
C. permanent ram
D. sd ram
Question 59
The CPU sends out a ____ signal to indicate that valid data is available on the data bus:
A. read
B. write
C. both a and b
D. none of these
Question 60
An error in computer data is called
A. chip
B. bug
C. cpu
D. storage device
Question 61
The CPU removes the ___ signal to complete the memory write operation:
A. read
B. write
C. both a and b
D. none of these
Question 62
The silicon chips used for data processing are called
A. ram chips
B. rom chips
C. micro processors
D. prom chips
Question 63
BIU STAND FOR:
A. bus interface unit
B. bess interface unit
C. a and b
D. none of these
Question 64
The instructions for starting the computer are house on
A. random access memory
B. cd-rom
C. read only memory chip
D. all of above
Question 65
EU STAND FOR:
A. execution unit
B. execute unit
C. exchange unit
D. none of these
Question 66
The ALU of a computer normally contains a number of high speed storage element called
A. semiconductor memory
B. registers
C. hard disks
D. magnetic disk
Question 67
The first digital computer built with IC chips was known as
A. ibm 7090
B. apple – 1
C. ibm system / 360
D. vax-10
Question 68
Which of the following is used for manufacturing chips?
A. control bus
B. control unit
C. parity unit
D. semiconductor
Question 69
To locate a data item for storage is
A. field
B. feed
C. database
D. fetch
Question 70
A directly accessible appointment calendar is feature of a … resident package
A. cpu
B. memory
C. buffer
D. alu
Question 71
A/n …. Device is any device that provides information, which is sent to the CPU
A. input
B. output
C. cpu
D. memory
Question 72
Current SIMMs have either … or … connectors (pins)
A. 9 or 32
B. 30 or 70
C. 28 or 72
D. 30 or 72
Question 73
BCD stands for:
A. binary coded decimal
B. binary coded decoded
C. both a & b
D. none of these
Question 74
A microprocessor retries instructions from :
A. control memory
B. cache memory
C. main memory
D. virtual memory
Question 75
The four index register can be used for:
A. arithmetic operation
B. multipulation operation
C. subtraction operation
D. all of these
Question 76
The _______ address of a memory is a 20 bit address for the 8086 microprocessor:
A. physical
B. logical
C. both
D. none of these
Question 77
Microprocessor reference that are available in the cache are called______:
A. cache hits
B. cache line
C. cache memory
D. all of these
Question 78
Which of the following memories needs refresh?
A. sram
B. dram
C. rom
D. all of above