Deck 9: Exploring Concepts and Applications of Memory and Counters in Digital Electronics

Question 1

Complement of F' gives back  

A)f'
B)f
C)ff
D)ff'

Answer 1

f

Question 2

Decimal digit in BCD can be represented by                          

A)1 input line
B)2 input lines
C)3 input lines
D)4 input lines

Answer 2

4 input lines

Question 3

The number of logic gates and the way of their interconnections can be classified as

A)logical network
B)system network
C)circuit network
D)gate network

Answer 3

logical network

Question 4

EPROM uses an array of                                

A)p-channel enhancement type mosfet
B)n-channel enhancement type mosfet
C)p-channel depletion type mosfet
D)n-channel depletion type mosfet

Question 5

The EPROM was invented by                              

A)wen tsing chow
B)dov frohman
C)luis o brian
D)j p longwell

Question 6

Address decoding for dynamic memory chip control may also be used for

A)chip selection and address location
B)read and write control
C)controlling refresh circuits
D)memory mapping

Question 7

Which of the following describes the action of storing a bit of data in a mask ROM?

A)a 0 is stored by connecting the gate of a mos cell to the address line
B)a 0 is stored in a bipolar cell by shorting the base connection to the address line
C)a 1 is stored by connecting the gate of a mos cell to the address line
D)a 1 is stored in a bipolar cell by opening the base connection to the address line

Question 8

The check sum method of testing a ROM                              

A)allows data errors to be pinpointed to a specific memory location
B)provides a means for locating and correcting data errors in specific memory locations
C)indicates if the data in more than one memory location is incorrect
D)simply indicates that the contents of the rom are incorrect

Question 9

The initial values in all the cells of an EPROM is                              

A)0
B)1
C)both 0 and 1
D)alternate 0s and 1s

Question 10

To store 0 in such a cell, the floating point must be                              

A)reprogrammed
B)restarted
C)charged
D)power off

Question 11

The major disadvantage of RAM is?

A)its access speed is too slow
B)its matrix size is too big
C)it is volatile
D)high power consumption

Question 12

Which one of the following is used for the fabrication of MOS EPROM?

A)tms 2513
B)tms 2515
C)tms 2516
D)tms 2518

Question 13

How many addresses a MOS EPROM have?

A)1024
B)512
C)2516
D)256

Question 14

ROMs retain data when                              

A)power is on
B)power is off
C)system is down
D)all of the mentioned

Question 15

When a RAM module passes the checker board test it is                              

A)able to read and write only 0s
B)faulty
C)probably good
D)able to read and write only 1s

Question 16

What is the difference between static RAM and dynamic RAM?

A)static ram must be refreshed, dynamic ram does not
B)there is no difference
C)dynamic ram must be refreshed, static ram does not
D)sram is slower than dram

Question 17

How many natural states will there be in a 4-bit ripple counter?

A)4
B)8
C)16
D)32

Question 18

A ripple counter's speed is limited by the propagation delay of  

A)each flip-flop
B)all flip-flops and gates
C)the flip-flops only with gates
D)only circuit gates

Question 19

One of the major drawbacks to the use of asynchronous counters is that                          

A)low-frequency applications are limited because of internal propagation delays
B)high-frequency applications are limited because of internal propagation delays
C)asynchronous counters do not have major drawbacks and are suitable for use in high- and low-frequency counting applications
D)asynchronous counters do not have propagation delays, which limits their use in high- frequency applications

Question 20

Internal propagation delay of asynchronous counter is removed by                          

A)ripple counter
B)ring counter
C)modulus counter
D)synchronous counter

Question 21

How many flip-flops are required to construct a decade counter?

A)4
B)8
C)5
D)10

Question 22

The terminal count of a typical modulus-10 binary counter is                          

A)0000
B)1010
C)1001
D)1111

Question 23

A ripple counter's speed is limited by the propagation delay of                          

A)each flip-flop
B)all flip-flops and gates
C)the flip-flops only with gates
D)only circuit gates

Question 24

A 4-bit counter has a maximum modulus of                          

A)3
B)6
C)8
D)16

Question 25

UP-DOWN counter is a combination of                          

A)latches
B)flip-flops
C)up counter
D)up counter & down counter