160+ 8085 Microprocessor Solved MCQs

101.

A microprocessor retries instructions from :

A. control memory
B. cache memory
C. main memory
D. virtual memory
Answer» C. main memory
102.

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
Answer» B. write
103.

The CPU removes the ___ signal to complete the memory write operation:

A. read
B. write
C. both a and b
D. none of these
Answer» A. read
104.

BIU STAND FOR:

A. bus interface unit
B. bess interface unit
C. a and b
D. none of these
Answer» A. bus interface unit
105.

EU STAND FOR:

A. execution unit
B. execute unit
C. exchange unit
D. none of these
Answer» A. execution unit
106.

Eight of the register are known as:

A. general- purpose register
B. pointer or index registers
C. segment registers
D. other register
Answer» A. general- purpose register
107.

The four index register can be used for:

A. arithmetic operation
B. multipulation operation
C. subtraction operation
D. all of these
Answer» A. arithmetic operation
108.

IP Stand for:

A. instruction pointer
B. instruction purpose
C. instruction paints
D. none of these
Answer» A. instruction pointer
109.

CS Stand for:

A. code segment
B. coot segment
C. cost segment
D. counter segment
Answer» A. code segment
110.

DS Stand for:

A. data segment
B. direct segment
C. declare segment
D. divide segment
Answer» A. data segment
111.

The acculatator is 16 bit wide and is called:

A. ax
B. ah
C. al
D. dl
Answer» A. ax
112.

How many bits the instruction pointer is wide:

A. 16 bit
B. 32 bit
C. 64 bit
D. 128 bit
Answer» A. 16 bit
113.

How many type of addressing in memory:

A. logical address
B. physical address
C. both a and b
D. none of these
Answer» C. both a and b
114.

The size of each segment in 8086 is:

A. 64 kb
B. 24 kb
C. 50 kb
D. 16kb
Answer» A. 64 kb
115.

The _______ address of a memory is a 20 bit address for the 8086 microprocessor:

A. physical
B. logical
C. both
D. none of these
Answer» A. physical
116.

The pin configuration of 8086 is available in the________:

A. 40 pin
B. 50 pin
C. 30 pin
D. 20 pin
Answer» A. 40 pin
117.

DIP stand for:

A. deal inline package
B. dual inline package
C. direct inline package
D. digital inline package
Answer» B. dual inline package
118.

EA stand for:

A. effective address
B. electrical address
C. effect address
D. none of these
Answer» A. effective address
119.

BP stand for:

A. bit pointer
B. base pointer
C. bus pointer
D. byte pointer
Answer» B. base pointer
120.

DI stand for:

A. destination index
B. defect index
C. definition index
D. delete index
Answer» A. destination index
121.

SI stand for:

A. stand index
B. source index
C. segment index
D. simple index
Answer» B. source index
122.

ALE stand for:

A. address latch enable
B. address light enable
C. address lower enable
D. address last enable
Answer» A. address latch enable
123.

NMI stand for:

A. non mask able interrupt
B. non mistake interrupt
C. both
D. none of these
Answer» A. non mask able interrupt
124.

The offset of a particular segment varies from _________:

A. 000h to fffh
B. 0000h to ffffh
C. 00h to ffh
D. 00000h to fffffh
Answer» B. 0000h to ffffh
125.

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
Answer» D. all of these
126.

________ is usually the first level of memory access by the microprocessor:

A. cache memory
B. data memory
C. main memory
D. all of these
Answer» A. cache memory
127.

Microprocessor reference that are available in the cache are called______:

A. cache hits
B. cache line
C. cache memory
D. all of these
Answer» A. cache hits
128.

Microprocessor reference that are not available in the cache are called_________:

A. cache hits
B. cache line
C. cache misses
D. cache memory
Answer» C. cache misses
129.

Which causes the microprocessor to immediately terminate its present activity:

A. reset signal
B. interupt signal
C. both
D. none of these
Answer» A. reset signal
130.

Which is responsible for all the outside world communication by the microprocessor:

A. biu
B. piu
C. tiu
D. liu
Answer» A. biu
131.

INTR: it implies the__________ signal:

A. intrrupt request
B. intrrupt right
C. intrrupt rongh
D. intrrupt reset
Answer» A. intrrupt request
132.

Which of the following are the two main components of the CPU?

A. control unit and registers
B. registers and main memory
C. control unit and alu
D. alu and bus
Answer» C. control unit and alu
133.

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
Answer» A. machine language
134.

Which of the following is used as a primary storage device?

A. magnetic drum
B. prom
C. floppy disk
D. all of these
Answer» B. prom
135.

Which of the following memories needs refresh?

A. sram
B. dram
C. rom
D. all of above
Answer» B. dram
136.

The memory which is programmed at the time it is manufactured

A. prom
B. ram
C. prom
D. eprom
Answer» A. prom
137.

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
Answer» C. magnetic tape
138.

Registers, which are partially visible to users and used to hold conditional, are known as

A. pc
B. memory address registers
C. general purpose register
D. flags
Answer» C. general purpose register
139.

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
Answer» C. microprocessor does not contain i/o devices
140.

The first microprocessor built by the Intel Corporation was called

A. 8008
B. 8080
C. 4004
D. 8800
Answer» C. 4004
141.

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
Answer» B. extremely high reliability
142.

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
Answer» D. all of the above
143.

Which is the type of memory for information that does not change on your computer?

A. ram
B. rom
C. eram
D. rw / ram
Answer» B. rom
144.

Before a disk can be used to store data. It must be…….

A. formatted
B. reformatted
C. addressed
D. none of the above
Answer» A. formatted
145.

Which company is the biggest player in the microprocessor industry?

A. motorola
B. ibm
C. intel
D. amd
Answer» C. intel
146.

A typical personal computer used for business purposes would have… of RAM.

A. 4 kb
B. 16 k
C. 64 k
D. 256 k
Answer» D. 256 k
147.

The word length of a computer is measured in

A. bytes
B. millimeters
C. meters
D. bits
Answer» D. bits
148.

Which part of the computer is used for calculating and comparing?

A. disk unit
B. control unit
C. alu
D. modem
Answer» C. alu
149.

Can you tell what passes into and out from the computer via its ports?

A. data
B. bytes
C. graphics
D. pictures
Answer» A. data
150.

What is the responsibility of the logical unit in the CPU of a computer?

A. to produce result
B. to compare numbers
C. to control flow of information
D. to do math’s works
Answer» B. to compare numbers
151.

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
Answer» D. either of the above
152.

Which of the following memories allows simultaneous read and write operations?

A. rom
B. ram
C. eprom
D. none of above
Answer» B. ram
153.

Which of the following memories has the shortest access times?

A. cache memory
B. magnetic bubble memory
C. magnetic core memory
D. ram
Answer» A. cache memory
154.

A 32 bit microprocessor has the word length equal to

A. 2 byte
B. 32 byte
C. 4 byte
D. 8 byte
Answer» C. 4 byte
155.

An error in computer data is called

A. chip
B. bug
C. cpu
D. storage device
Answer» B. bug
156.

The silicon chips used for data processing are called

A. ram chips
B. rom chips
C. micro processors
D. prom chips
Answer» D. prom chips
157.

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
Answer» C. read only memory chip
158.

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
Answer» B. registers
159.

The first digital computer built with IC chips was known as

A. ibm 7090
B. apple – 1
C. ibm system / 360
D. vax-10
Answer» C. ibm system / 360
160.

Which of the following terms is the most closely related to main memory?

A. non volatile
B. permanent
C. control unit
D. temporary
Answer» D. temporary
161.

Which of the following is used for manufacturing chips?

A. control bus
B. control unit
C. parity unit
D. semiconductor
Answer» D. semiconductor
162.

To locate a data item for storage is

A. field
B. feed
C. database
D. fetch
Answer» D. fetch
163.

A directly accessible appointment calendar is feature of a … resident package

A. cpu
B. memory
C. buffer
D. alu
Answer» B. memory
164.

A/n …. Device is any device that provides information, which is sent to the CPU

A. input
B. output
C. cpu
D. memory
Answer» A. input
165.

Current SIMMs have either … or … connectors (pins)

A. 9 or 32
B. 30 or 70
C. 28 or 72
D. 30 or 72
Answer» D. 30 or 72
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