Questions and Answers: Unit 4 : Web Application and Security
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Questions and Answers Unit 4 | Web
Application and Security
Q1. Define networking?
Ans. A computer network is a collection of
computers that allow sharing of resources and information.
Q2. Give any three advantages of networking.
Ans. Three advantages of networking are :
1. Data Sharing:
2. Files Transfer
3. Hardware Sharing
4. Internet Access Sharing
Q3. Explain the term packet with reference to
data transfer.
Ans. Data transfer over the network is divided
into small segments called packet. Each packet is sent from one computer to
another computer until it finds its destination.
Q4. Explain Wifi and its significance.
Ans. Wi-Fi stands for wireless fidelity. Wi-Fi
is a popular technology that allows an electronic device such as computers or
mobile phones to exchange data wirelessly over a network.
Wi-Fi is used where cables cannot be run (such
as old buildings, outdoor areas) to provide network and Internet access
Q5. Compare LAN with WAN.
Ans.
WAN
It
Stands for Local Area Network
It
Stands for Wide Area Network
It
covers a small geographical area.
It
spreads across countries.
Q6. Expand the Following terms :
a. DSL : Digital Subscriber Line
b. ISP : Internet Service Provider
c. Modem : Modulator and Demodulator
d. WWW : World Wide Web
e. LAN : Local Area Network
f. MAN : Metropolitan Area Network
g. WAN : Wide Area Network
h. P2P : Peer to Peer
Q7. Explain P2P Architecture and how it is
different from Client Server Architecture?
Ans. Networks in which all computers have an
equal status are called peer to peer networks. Generally in such a network each
terminal has an equally competent CPU.
Networks in which certain computers have
special dedicated tasks, providing services to other computers (in the network)
are called client server networks. The computer(s) which provide services are
called servers and the ones that use these services are called clients.
Q8. List any five application based instant
messaging software.
Ans. Five application based instant messaging
software are :
Google
Talk
Yahoo!
Messenger
Skype
Windows
Live Messenger
Rediff
Bol
Q9. What do you mean by instant messages?
Ans. Instant messaging (IM) is a form of
communication over the Internet that offers an instantaneous transmission of
text-based messages from sender to receiver.
Q10. Give any three key features of Instant
Messaging.
Ans. Three key features of Instant Messaging
are :
Write in A4 size paper (The first page will be as Cover page about student's Information) PORTFOLIO/ PRACTICAL FILE: SQL Commands CREATE TABLE Command: This command is used to create a new table or relation. The syntax for this command is: CREATE TABLE <table name> ( <column1> <datatype> [constraint] , <column1> <datatype> [constraint], <column1> <datatype> [constraint], ); where []=optional The keyword CREATE TABLE is followed by the name of the table that you want to create. Then within parenthesis, you write the column definition that consists of the column name followed by its data types and optional constraints. There can be as many columns as you require. Each column definition is separated with a comma (,). All SQL statements should end with a semicolon (;). Example: CREATE TABLE Teacher ( Teacher_ID INTEGER PRIMARY KEY, First_Name VARCHAR(20), Last_Name VARCHAR(
Unit 3: Database Management System SESSION 1: APPRECIATE THE CONCEPT OF DATABASE MANAGEMENT SYSTEM Q1. What is a database? Ans. A database is an organized collection of data. Q2. What is DBMS? Ans. DBMS stands for Database Management System. It is software that controls the creation, maintenance, and use of a database. Q3. Name two DBMS Software. Ans. Two DBMS Software are : 1 MySQL 2. Oracle 3. Microsoft SQL Server 4. Microsoft Access. Q4. What is the difference between a Flat file and a Relational? Flat File: Data is stored in a single table. It is suitable for less amount of data. Relational: Data is stored in multiple tables. It is suitable for large amounts of data. Q5. What do you mean by database servers? Ans. Database servers are dedicated computers that hold the actual databases and run only the DBMS and related software. Q6. Write four advantages of a database. Ans. Four advantages of a database are 1 It reduces Data Redundancy 2. It allows sharing of data. 3. It
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