Regional Maritime University

1 . 1. How many address lines are required to connect a 4 KB RAM to a microprocessor?

10
16
12
20

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2 . What is stored in the H & L general-purpose register?

Opcode
Address of memory
Address of next instruction
Temporary data

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3 . Which of the following is not true about 8085 microprocessor?

It is an 8-bit microprocessor
It is a 40 pin DIP chip
It is manufactured using PMOS technology
It has 16 address lines

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4 . Which of the following is true about microprocessors?

It has an internal memory
It has interfacing circuits
It contains ALU, CU, and registers
It uses Harvard architecture

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5 . Which of the following is not true about the address bus?

It consists of control PIN 21 to 28
It is a bidirectional bus
It is 16 bits in length
Lower address bus lines (AD0 ? AD7) are called ?Line number?

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6 . What is Microprocessor?

A multipurpose PLD that accepts binary data as input
A multipurpose PLD that accepts an integer as input
A multipurpose PLD that accepts whole numbers as input
A multipurpose PLD that accepts prime numbers as input

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7 . In 8085 which are 16-bit register

Stack Pointer and Accumulator
Program Counter and Accumulator
Stack Point and Program Counter
Accumulator, Stack Point and Program Counter

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8 . How many types of modes of I/O Data Transfer?

2
3
4
5

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9 . Which is the small amount of high- speed memory used to work directly with the microprocessor

Cache memory
Main memory
Register
Auxiliary memory

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10 . The RAM which is created using bipolar transistors is called

Dynamic RAM
Static RAM
Permanent RAM
DDR RAM

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11 . The method of synchronizing the processor with the I/O device in which the device sends a signal when it is ready is?

Exceptions
Signal handling
Interrupts
DMA

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12 . The input and output operations are respectively similar to the operations,

read, read
write, write
write, read
read, write

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13 . In memory-mapped I/O ____________

The I/O devices and the memory share the same address space
The I/O devices have a separate address space
The memory and I/O devices have an associated address space
A part of the memory is specifically set aside for the I/O operation

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14 . Secondary memory is also called____.

Auxiliary
Backup store
Both A and B
None of these

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15 . Which is used to store critical pieces of data during subroutines and interrupts?

Stack
Queue
Accumulator
Data register

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16 . The 8085 microprocessor is based in a ________ pin DIP.

40
45
20
35

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17 . The address bus flow in __________.

Bidirectional
unidirectional
multidirectional
circular

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18 . The register which holds the information about the nature of results of arithmetic and logic operations is called as

Accumulator
Condition code register
Flag register
Process status register

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19 . The first machine cycle of an instruction is always

A memory read cycle
A fetch cycle
An I/O read cycle
A memory write cycle

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20 . At the beginning of a fetch cycle, the contents of the program counter are

incremented by one.
transferred to address bus.
transferred to memory address register
transferred to memory data register

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