Wednesday, 7 June 2017

Computer architecture



Choke 

The choke coil works because it acts as an inductor. When the current passing through changes, as AC currents do, it typically creates a magnetic field in the coil that works against that current. This property, known as inductance, blocks most of the AC current from passing through.





key/value pair
address /video file data
address/ audio file data
addresss/ commands
address/code
embedded systems 
address/ time
                                                                 address/ number(timer chip 1 second delay)
 trignometric function /values
log /values
garbage code of 1 second delay duration
increment decrement address pointers for looping code


Inductor


 The inductor is a component that allows DC, but not AC, to flow through it. 

Wednesday, 31 May 2017

read file



Contents of the Text file:

...

write to file


AAAAAAAAAAAAAAAAAAAAA txt from div

table




First row.
Second row.

Sunday, 28 May 2017

BPO


BPO





  Name the components of CPU < Explain USB Port (Universal Serial Bus) Give the specifications of Laser printer Write a note on computer maintenance What are the possible threats to a computer system and how to provide security? Explain the cache memory in detail Name the different searching methods Explain Binary search algorithm What is an array? What is a user defined function?


Hello How may I assist you 1. Name the components of CPU Ans. a) ALU b)PC c) Accumulator d) MAR e) IR f) ID g) MDR Hope this information was useful. Have a nice day
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2.Explain USB Port (Universal Serial Bus). Ans. a. It is a high speed serial bus It is a plug and play interface between computers and add on devices.
3.Give the specifications of Laser printer.
Ans. a. Resolution varies from 600 to 1200 dots per inch.
b. Speed varies from 4 PPM to 24 PPM.
c. Buffer size varies from 4MB to 32 MB
d. Can print color images.

4.Write a note on computer maintenance.
Ans
: a. Avoid heat dust and noise
b. Periodic updates and enhancements
c. Installing fire walls and anti virus.
d. In house software maintenance
e. Computer periodic checkup.

5.What are the possible threats to a comput
er system and how to
provide security?
Ans
:
Threats
a. Privacy
b. Integrity
c. Environmental damage
d. Human threats
e. Software threats
f. Unauthorized access
g. Computer viruses

6. Explain the cache memory in detail.
Ans
:
Cache memory is a small and fast memory between CPU and main memory. It is extremely fast
compared to normal memory. Transferring data between main memory and CPU causes delay because
RAM is slower than CPU. Cache memory stores copies of data from most frequently used main memory
locations. When processor needs to read from or write to a location in main memory, it first checks
whether a copy of data is in the cache. If so proc
essor immediately reads or writes to cache.

7. Name the different searching methods.
Ans: a. Linear Search
b. Binary Search

8. Explain Binary search algorithm
Ans: This algorithm is used to search for an elemen
t in a sorted list. The value of the element in the
middle of the list is co
mpared with the value of the element to
be searched for . If the middle
element is larger, the de
sired element has to be in the upper of
the list. If the middle element is
smaller, the de
sired element has to be lowe
r half of the list. The nu
mber of elements to be
searched is reduced
by half in every iteration.

9. What is an array?
An array is a group of
data of the same data type
stored in successive storage
locations.

10. What is
a user defined function?
A user-defined function is a comple
te and independent progr
am unit, which can be
used(or invoked) by the main progr
am or by other
sub-programs
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