Practice Digital Electronics Multiple Choice Questions with Answers Quiz-4

Q.1.

If a PAL has been programmed once

its logic capacity is lost
its outputs are only active high
its outputs are only active low
it cannot be reprogrammed

Q.2.

The difference between a PAL & a PLA is

pals and plas are the same thing
the pla has a programmable or plane and a programmable and plane, while the pal only has a programmable and plane
the pal has a programmable or plane and a programmable and plane, while the pla only has a programmable and plane
the pal has more possible product terms than the pla

Q.3.

Which type of device FPGA are?

sld
srom
eprom
pld

Q.4.

The complex programmable logic device contains several PLD blocks and

a language compiler
and/or arrays
global interconnection matrix
field-programmable switches

Q.5.

For programmable logic functions, which type of PLD should be used?

pla
pal
cpld
sld

Q.6.

Which one of the following is volatile in nature?

rom
erom
prom
ram

Q.7.

Static RAM employs

bjt or mosfet
fet or jfet
capacitor or bjt
bjt or mos

Q.8.

Dynamic RAM employs

capacitor or mosfet
fet or jfet
capacitor or bjt
bjt or mos

Q.9.

The magnetic core memories have been replaced by semiconductor RAMs, why?

semiconductor rams are highly flexible
semiconductor rams have highest storing capacity
semiconductor rams are smaller in size
all of the mentioned

Q.10.

The data written in flip-flop remains stored as long as

power is supplied
power is removed
power is supplied
power is removed

Q.11.

What is memory decoding?

the process of memory ic used in a digital system is overloaded with data
the process of memory ic used in a digital system is selected for the range of address assigned
the process of memory ic used in a digital system is selected for the range of data assigned
the process of memory ic used in a digital system is overloaded with data allocated in memory cell

Q.12.

How many address bits are required to select memory location in Memory decoder?

4 kb
8 kb
12 kb
16 kb

Q.13.

The first step in the design of memory decoder is

selection of a eprom
selection of a ram
address assignment
data insertion

Q.14.

PLA is used to implement

a complex sequential circuit
a simple sequential circuit
a complex combinational circuit
a simple combinational circuit

Q.15.

How many types of PLD is?

2
3
4
5

Q.16.

Logic circuits can also be designed using

ram
rom
pld
pla

Q.17.

PLD contains a large number of

flip-flops
gates
registers
all of the mentioned

Q.18.

A PLA is similar to a ROM in concept except that

it hasn’t capability to read only
it hasn’t capability to read or write operation
it doesn’t provide full decoding to the variables
it hasn’t capability to write only

Q.19.

ICis organised as

512 * 4
16 * 1
32 * 4
64 * 2

Q.20.

How memory expansion is done?

by increasing the supply voltage of the memory ics
by decreasing the supply voltage of the memory ics
by connecting memory ics together
by separating memory ics

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