(introduction,ms excel,ms word,DOS(disc operating number)

1. Computer exam notes
1-Ms excel-it is an application software used to create sheets
2-Average= finds the average , =average(select)
3-Sum=totalsum , =sum(select)
4-Minimum=finds the cell with minimum value, =min(select)
5-Maximum=finds the cell with maximum value, =max(select)
6-countA = finds those cells which are not blank, =counta(select)
7-countblank=finds those cells which are blank, =countblank(select)
8-countif=finds that result match with the criteria or not, =countif(select,”y”)
9-countifs=finds that result match more than one criteria or not , =countifs(select,”Y”)
10-sqrt= returns the number into square root, =sqrt(number)

2. Computer exam notes
11-home tab=hometab is the most used tab,it includes text and cell formatting features
12-insert tab=insert tab help in inserting text boxes,pics,clipart,chart
13-page layout tab=helps in adjusting margin,page orientation and theme of the page
14-page orientation= portrait and landscape
15-By default page comes in portrait orientation
16-Formula tab=library of formulas
17-Data tab=helps to modify data by sorting and filtering
18-Review tab=helps in correcting grametical mistakes and translation
119-Bibliography=list of sources from which information is gathered
1
Notes

3. Computer exam notes
20-Pivot table=pivot table helps in summarisingg lots of data into table/chart
21-Caption=heading/title/numbered labeled
22-Merger=merger option merges two or more cells
23-Header=piece of art,graphics,photo on the top of the page
25-Footer=piece of art,graphics,photo on the end of the page
26-Ms word=microsoftword allows the user to type and save document,and also helps
in modifying the document by various tools
27-Format pointer tool=format pointer tool helps to copy formatting from one file to
another
28-Mail merger=helps to create multiple letter,labels,tags

4. Computer exam notes
29-Margin=strips of white space on the edges of the page,by default page have 1INCH
margin on the top and bottom
30-Footnote=piece of text,sources of formation on the bottom of the page
31-End note=sources/credit/citation on the end of entire document
32-Vlookup=virtual look up by searching the value on the left most column of the table
and returning the value based on index number
33-Hlookup=horizontal look up by searching the value on the top most row and
returning the value based on index number
34-DOS(disc operating number)=used for shorthand
Dir=directory
Rd=remove directory
Copy=copy file

5. Computer exam notes
Del=delete file
Cd=change current directory
Cls=close terminal screen
Md=make new directory
Tree=internal command,show path to directory
Time=show system time
35-OS(operating system)=most important program which runs the system and OS does
basic tasks such as-recognising input from keyboard,showing output to the screen
36-Windows=windows is the operating system of Microsoft and is suitabke for home
and business computers
37-Worksheet=electronic sheet which contains lots of rows and column
38-Workbook=electronic book which contains lots of sheets

6. Computer exam notes
39-Ribbons=ribbons is the great way of understanding the change in ms office,because
ribbons hold whole information about previous version on ms office
40-Page break=word automatically break the page when you reach the limit,but with
page break option you can manually break the page
41-Row height is expressed in pixels
42-Group of cell is called “RANGE”
43-RAM is of two types – 1=SRAM=static a(ndom access memory , 2=DRAM=dynamic
random access memory
44-Difference b/w internet and interanet-:
Internet- 1-public network 2-everyone can access 3-visitor traffic is unlimited
Intranet- 1-private network 2-limited people can access 3-visitor traffic is limited

7. Computer exam notes
45-Types of soft ware-:
1-system software=designes to operate the system and provide a platform to
computer,example –linux
2-Application software=designed to perform a specific task,example education software,games
3-utility software=designed to improve the quality of computer system,example-firewall
46-Three types of network are-:
1-LAN(local area network)-geographical boundries are small , minimum 2 comp are required to
form LAN
2-WAN(wide area network)-geographical reach is larger than LAN, WAN can extent to
nationwide/worldwide , costly process
3-MAN(metropolitian area network)-used in organizations which needs to connect several small
facilities together for sharing information.
47-keyboard keys-:

8. Computer exam notes
1-Fuctional keys= f1 – f12
2-Alpha numeric keys= a – z and 0 – 9
3-Cursor keys= right,left,up,down
4-Special keys= alt.ctrl,shift,space
48-monitor=VDU(virtual display unit) two types of vdu are- 1=CRT(cathode ray tube)
2=LCD(liquid cristal display)
49-input device= those device which are used for giving command to system,such as-
mouse,keyboard
50-Output device=those device from which we can get result,such as-
monitor,printer,plotter
51-type of storage are= permanent storage=hard disc , temporary storage=RAM and
ROM

9. Computer exam notes
52-advantage of computer= accurate,saves time,saves money,never gets tired,high
storage capacity
53-disadvantage of computer= no IQ ,understand binary language only,depend on
us,no feeling
54-spaces-:
4byts=1nibble
8byts=1bite
1024bite=1kb
1024kb=1mb
1024mb=1gb
1024gb=1tb
1024tb=1hb

10. Computer exam notes
55-APPLICATION of computer are -:BANK, EDUCATION, MARKETTING, HEALTHCARE,
ENGENEERING, GOVERNMENT, COMMUNICATION
56-MOD function=returns the remainder after the number is divided by its divisor
=MOD(SELECT)
57-NOW function=refresh the date and time whenever worksheet recalculate
=NOW()
58-TODAY function-refresh the date whenever worksheet recalculate
=TODAY()
59-COUNT function= counts the total number of cell
=count(select)

11. Computer exam notes
60-software=software is collection of instruction,that enable the user to interact with
the system
61-advantages of computer network are-:
1=enable file sharing
2=helps in sharing software
3=increase storage capacity because too many systems are connected together through
network.
62-disadvantages of computer network are-:
1=security issues-if one computer is hacked then hacker can command all the computers
because all the systems are connected through network
2=virus issues-if one system is infected by virus ,then all of them can get infected because
virus can spread through network

12. Computer exam notes
3=expensive setup
4=totally dependent on the main server
63-reference tab=reference tab allows you to create table of content,page of citation
64-cross reference=commonly used in large document,used to direct reader to another
part of document such as image,text
65-mailing tab=allows you to send mail such as printing envelope,labels tags
maDeby-: VAIBHAV NEGI
computer important theory(INTRODUCTION,MS EXCEL,MS WORD,NETWORKS) .

13. Computer exam notes