Introduction to Computer I

handslustyInternet and Web Development

Dec 14, 2013 (3 years and 7 months ago)

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Introduction to

Computer
-
I




1.

1
.Which of the following languages is more suited to a structured program?

ANS1
Structured programming

is a

programming paradigm

aimed on improving the clarity,
quality, and development time of a

computer program
by making extensive use
of

subroutines
,

block structures

and

for

and

while loops

-

in contrast to using simple tests and
jumps such as the
goto

statement which could lead to "
spaghetti code
" which is both difficult to
follow and to maintain.

It emerged in the 1960s, particularly from work by Böhm and Jacopini,
[1]

and a famous letter,

"
Go
To Statement Considered Harmful
"
, from
Edsger Dijkstra

in 1968
[2]

and was bolstered
theoretically by the

structured program theorem
, and practically by the emergence of languages
such as

ALGOL

with suitably rich control structures.

It is poss
ible to do structured programming in
any programming language, though it is preferable to use something like a
procedural
programming language
. Some of the languages

initially used for structured
programming languages include:

ALGOL
,

Pascal
,

PL/I

and

Ada

-

but most new

procedural
programming languages

since that time have included features to encourage structured
programming, and sometimes deliberately left out features
[3]

that would make unstructured
programming easy.

2.

How are charts useful in Excel? Compare any three chart types available in
Excel?

ANS2
Microsoft Excel

is a

commercial

spreadsheet

application written and distributed
by

Microsoft

for

Microsoft Windows

and

Mac OS X
. It features calculation, graphing tools,

pivot
tables
, and a macro programming language called

Visual Basic for Applications
. It has been a
very widely applied

spreadsheet for these platforms, especially since version 5 in 1993, and it has
almost completely replaced

Lotus 1
-
2
-
3

as the industry standard for spreadsheets. Excel forms
part of

Microsoft Office
. The current versions are 2010 for

Microsoft Windows

and 2011 for

Mac
OS X

.

Excel supports

charts
,

graph
s

or

histograms

generated from specified groups of cells. The
generated graphic component can either be embedded within the current sheet, or added as a
separate object.

These displays
are dynamically updated if the content of cells change. For example, suppose that
the important design requirements are displayed visually; then, in response to a user's change in
trial values for parameters, the curves describing the design change shape,
and their points of
intersection shift, assisting the selection of the best design.

3.

What is the difference between Animation and Transition? Which view can be
used to insert and test the: Animation effects and Transition effects?

4.

Differentiate between rel
ative and absolute cell referencing techniqu
es with the
help of sample data

5.

How is the Switch User option different from the Log Off option?

ANS5
Fast user switching

is a feature on some modern

multi
-
user

operating systems

such
as

Windows XP

and newer,

Mac OS X
,

Linux
.
[1]

It allows users to switch between user accounts
on a si
ngle

PC

without quitting applications and logging out. Analogous functionality was first
developed on consumer level hardware by the

Xenix

operating system which supported
multiple

virtual consoles
.

Linux
,

BSD
, and most other PC Unixes adopted virtual terminals and
further developed the user interfaces, including allowing users to optionally run separate
graphical

X Window System

sessions.

In

computer security
, a

login

or

logon

(also
called

logging i
n

or

on

and

signing in

or

on
) is the process by which individual

access

to
a

computer system

i
s controlled by

identifying

and

authentifying

the

user

referring
to

credentials
presented by the user.

A user can log in to a system to obtain access and can then

log out

or

log off

(perform
a

logo
ut

/

logoff
) when the access is no longer needed. To

log out

is to close off one's access to
a computer system after having previously logged in.

6.

Explain the usage of the EXT and OVR modes while entering text in Word?

ANS6
Ext JS

(pronounced E
-
X
-
T
-
J
-
S) is a

JavaScript

library for building interactive

web
applications
[1]

using techniques such as

Ajax
,
DHTML

and

DOM

scripting.

Originally built as an add
-
on library extension of

YUI

by Jack Slocum, Ext JS includes
intero
perability with

jQuery

and
Prototype
. Beginning with version 1.1, Ext JS retains
no
dependencies on external libraries, instead making their use optional.

When you are editing text in
Overtype mode, you are typing new characters over the existing characters. In Word and Excel, if Overtype
mode is turned on,

OVR
appears on the

status bar
. In Outlook,

OVR

does not appear.

To insert characters into existing text instead of overtyping that text, you must first turn off Overtype mode.

TURN ON OR OFF OVERT
YPE



Press INSERT or INS to tur
n Overtype mode on or off.


NOTES




In Excel, you must double
-
click a cell or press F2 to turn Overtype mode on or off. Also, the

Edit
directly in cell

check box must be selected (it is selected by default). To select or clear this check box, on
the

Tools

m
enu, click

Options
, and then click the

Edit

tab.



In Word, you can double
-
click

OVR

on the status bar to turn Overtype mode on or off. Or, on
the

Tools

menu, click

Options
, click the

Edit

tab, and then select or clear the

Overtype mode

check box.

7.

What is th
e difference between replying to a message and forwarding it?

8.

Write names of any two websites where information about latest viruses, anti
-
virus software etc can be found?