COMPUTER APPLICATION
CLASS - XII
Time 3 Hrs.
Max Marks - 100
(Theory - 75 Practical 25)
Unit 1.0
Data Processing Concepts.
Fundamentals : Defining Data processing and main steps ivolved in data processing,
Comparison of Human and Computerised methods of data processing.
File Organisation : Sequential Access file, Random Access file, Indexed
Squential Access.
Defining various files according to their usage : Master file, Transaction
files, Reference files, Archival files, Working files, Backup files, Report files.
Modes of processing : Batch, offline, on-line, real-time and distributed processing,
Designing Logical files, Data item collection, preparation, verification, editing and checking.
Key fields and arranging Data : Key field, Primary, Secondary and
arranging data, Concept of file sorting, searching, matching and merging.
Unit 2.0
Basics of data communication Network and Internet.
1.1
Basics of Data Communication.
Concept of Data Communications : Data Communication Code (Data encoding, ANSI, IBM),
Communication speed or Rate, Private vs Switched Channels, Analogy and Digital
Tarmsmission,
Parallel and Serial Transmission, Tariff, Communication Protocol/Standard
Data Communication Modes : Svnchronous and Asynchronous, Transmission, Simplex,
half duplex, Full duplex Communication.
Communication Hardware : Sender and Receiver Hardware (Nodes and workstation,
Multiplexer), Communication devices (Modems, Line drivers, CODEC),
Communication channels, (Two wire open line, Twistel pair cable, Coaxal cable,
Fibre Optic cable, Radio, microwave and satellite channels).
1.2
Basics of Computer Networking.
Fundamentals : Network Concept, Types of Network : LAN, WAN. Network Typologies
and their advantages and disadvantages.Star, Bus, and Ring.
LAN Access Method : CSMA/CD, Token passing.
Seven Layers of Communication Architecture : Application, Presentation, Session, Transport,
Network, Data link and Physical.
LAN Hardware and Software : Transmission channel (Twisted pair cable, Coaxal Cable,
Fiber optic cable, Radio waves), Network Interface Cards (Ethernet Arcent), Server (File
Server,
Printer Server, Modem server, distinguish between dedicated and Non-dedicated
server),
awareness of LAN Software and Operating System.
Awareness of Wide Area Network : Communication
Switching Techniques : Circuit switching. Message swithching and
Packet switching
(Datagram, virtual circuit) , WAN devices/
Hardware : Bridges, Routers, Gateways, X.25.
Types of WAN : 1. Public Networks : PSTN, PSDN, VAN/VAD, ISDN
2.
Private Networks.
2.3
Basics of Internet
Fundamental : Internet and working, governing of internet, financing.
Tools and services on Internet : Functional attributes of Electronic mail, World Wide Web
(WWW), Hypertext, Hyperling, Hyper media, User Group, newsgroups,
FAQ, FTP, Telnet, Internet
relay chart.
Search Engines : Search engines, PS function-Infoseck, Cycos, Altavista, Netscape,
Excite, Yahoo, Khoj, Deva, Internet Explorer, Nets- cape
Nevigator/Communicator.
Communication Protocol : TCP/IP
User identification : Domain Narming System or Letter Addressing System (Organisation
Domain, Geographic Domain), Required Hardware and Software to user
of Internet.
Ways for internet connection. Direct Link, Indirect link, Dial up access through
Internet
services Povoider (IPS) and accounts : (SI, IP, PPP, Shell accounts).
Internet in India : Internet Access Through ISP-Educational Network
(ERNET), Gateway
Internet Access Service (CHAS) and VSNI. Research getting, Internet
connected through VSNI.
Unit 3.0
3.1
Database Management System :
Database Management System
Fundamentals : Distinguish between DATA and INFORMATION Defining
Database
and its characteristics. Types of Data bases (Sample, Relational), Defining
need of a
Computerised Database.
DBMS : Defining Database Management System. Three level of Architecture of
a DBMS.
Internal, External and Conceptual, Data Independence Feature. speed of
Information Retrieval.
Different Approaches : for Data Retrieval : Ilierarchical, Network Relational,
Differences
between Ilierarchical and Network Databases versus Relational Databases,
Database Management
System versus File Management System. Indexing and searching
techniques : Indexing, Binary
search, Index Sequential Access Method.
3.2
Fox (Pro) Application Package.
Introducting Fox Pro : Running Fox Pro. exploring Fox Pro-menu system with
mouse and
keyboard, type of fields -: character, numeric, float date. logical, memo,
general creating of a
data-base file structure, entering record in a data-base file, listing contents
of a database file using
options with LIST, using Fox Pro. Help System, Moving and re-sizing
common window.
Viewing and Editing Data with : DISPLAY, LIST/DISPLAY, LOCATE,
EDIT, CHANGE,
BROWSE, REPLACE, DELETE, RECALL. PACK RECNO() modifiying
structure, handing
memo field.
Sorting and indexing Database File : Defining sorting, Indexing sorting file
with SORT command
and its options, indexing file with index command and its options,
comparison between SORT and
INDEX commands. distinguish between CDX, IDX, finding information
with FIND and SEEK
commands.
Reports and label : Creating and saving report format and a quick report
generating. previewing
and printing a report, saving a report in a text file, designing a custom
report. adding feature of report,
grouping and sub-grouping of data in a report designing, mailing address
labels, displaying and printing
labels. Memory variables, Date & Time functions and key Trapping:
Defining memory variables.
creating and using memory variables displaying and manipulating
information with ?/?? TIME ()
Displaying system clock on a screen. SECOND(), SYS(2). DATE()
OMONTII() CMONTII()
YEAR() DTOC(). CTOD(). DOW() CDOW(). STR(). SUBSTR().
UPPER(). TRIM().
REPLICATE(). INDKEY() LASTKEY(), READKEY(). ON KEY(). ON
KEY LABLE command.
Mathematical functions and commands : Controlling decimal digits in
result. SORT(), INT(),
FV(). PV(), ABS(). ROUND(). MIN(). MAX() BETWEEN() MOD()
AND % LEN(), SUM,
AVERAGE, COUNT CAL- CULATE.
Windows, menu. popups. Radio buttons, Check boxes using commands :
DEFINE
WINDOW with its options DEFINE MENU with its options, DEFINE POPUP with its
option,
creating radiobuttons and check boxes using GET and FUNCTION with
its options.
Creating and running command, flying commands : MODIFY COMMAND.
DO WHILE-END
DO, SKIP, ACCEPT INPUT, @ROW. COLSAY GET-READ. WAIT
Mathematical, relational and
logical operations IF- END IF. SCAN-ENDSCAN. FOR-END FOR, DO
CASE END CASE TEXTEND TEXT, SETCOMMANDS, Multiple file handing, using SELECT
SET RELATION TO
PROCEDURE names, SET PROCEDURE TO PROCEDURE name DO
WITH list of memory
variables, running command file with DO command.
Practicals in Computer application
Class XII
Time 3 Hrs.
1.
M.M. 25
Practicals based on Internet
5 Marks
2.
Practicals based on Fox Pro
10 Marks
3.
Internal assessment (Examination of Practical record/Project file)
5 Marks
4.
5 Marks
Viva
-----------------------------Total 25 Marks
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