From: MOAAZ SIDDIQ <mc100401285@vu.edu.pk>
Date: Wed, Dec 1, 2010 at 2:27 AM
Subject: .....::ll VU HELPINGHAND ll:::..... cs101 answers of short question
To: coool_vu_students@googlegroups.com, virtaul-pakistan@googlegroups.com, vumasters@googlegroups.com, vu-edu-pk@googlegroups.com, vu_helpinghand1@googlegroups.com
Short quiz
MIDTERM EXAMINATION
Fall 2008
What is coding?
The process of telling the computer what to do
WYSIWYG
(What-You-See-Is-What-You-Get)
Define URL
Uniform Resource Locator
What is Deterministic Algorithm?
1st Definition:
Sequence of steps that is taken to solve a problem
Better Definition:
A precise sequence of a limited number of unambiguous, executable steps that terminates
in the form of a solution
How can we calculate total number of rows in the truth table?
What are JavaScript literal and what are its types?
A data value that appears directly in a statement
Literals can be of several types. Some of them are:
Number
String
Boolean
What is the impact of web on our Society and Business?
The Internet provides numerous opportunities for small business start-ups. Those whose work is essentially information processing or production are now able to work from the comfort of their own homes, freeing them from the drudgery of commuting and office politics. The Internet is seen as an integral part of the trend towards globalization and the diminishing significance of the concept of nation state.
Spring 2010
Explain briefly the different techniques that are used to embed JavaScript code in a web page?
What is an interpreter? Write its one benefit over compiler
Interpreter translates the HLL program one statement at time. It reads a single
statement, translates it into machine language and passes that machine language code to
the uP and then translates the next statement, and so on
Whether response time of a microprocessor is greater or less than that of RAM?
How can we enter data in more than one line in an html form?
What is software life cycle?
The Software Lifecycle is a series of stages in the development of an application and is often used in Software Engineering.
Elaborate greedy algorithm definition with solid example in favour and one counter example?
An algorithm that always takes the best immediate, or local solution while finding an
answer
Greedy algorithms may find the overall or globally optimal solution for some
optimization problems, but may find less-than-optimal solutions for some instances of
other problems
KEY ADVANTAGE: Greedy algorithms are usually faster, since they don't consider the
details of possible alternatives
Greedy Algorithm: Counter Example
During one of the international cricket tournaments, one of the teams intentionally lost a
match, so that they could qualify for the next round
Spring 2010
What do you mean by Comments?
Comments are included on a Web page to explain how and why you wrote the page the
way you did
Comments can help someone other than the author to follow the logic of the page in the
author's absence
How can an operating system be viewed as a resource allocator?
What is the role of application software in Education?
Teachers in educational institutions direct the education of students and might draw on many subjects, including reading, writing, mathematics, science and history. This process is sometimes called schooling when referring to the education of teaching only a certain subject, usually as professors at institutions of higher learning. There is also education in fields for those who want specific vocational skills, such as those required to be a pilot. In addition there is an array of education possible at the informal level, such as in museums and libraries, with the Internet and in life experience. Many non-traditional education options are now available and continue to evolve.
Give four properties and two methods of window object ?
Objects may have a single or several properties
A property may have one of the following values:
Number -- Text -- Boolean
Array -- Functions
Objects (Example: "document" – a property of the "window" object – is an object in
itself. A "document" in turn may contain a "form" object as a property, and then that
"form" may contain a "button" property, which, once again, is an object in itself)
What is the difference between High-level and Low-level programming languages?
High level languages allow much more abstraction than low level languages. This allows algorithms and functions to be written without requiring detailed knowledge of the hardware used in the computing platform. The compiler provides this interface transparently for the programmer.
Low level languages will require more involvement with the actual register and interrupt interfaces to the hardware. This can provide more control and efficiency for the program and can be good for applications which need high speed execution, but high level compilers are much better at optimizing for speed now.
Spring 2010
Write the major types of softwares with examples?
System Software os(windows )
Application Software ms word spread sheat
What is the major difference between paragraph <p> and Line Break <BR> tags?
The "br" tag inserts a single line break into the web document.
The "p" tag defines a paragraph, but the paragraph is typically automatically given space before and after by the browser.
Why PASCAL was designed and what is the problem with PASCAL?
Pascal is very good for writing well-structured and readable programs, but it is not as
flexible as the C programming language
What are the key requirements of E-commerce Software?
Reliability
Security
Ability to handle 1000's of transactions, simultaneously
Write down the pseudo code for the following flow chart.
(a) Write down two positive features of client-side scripting.
(b) Discuss two deficiencies of JavaScript.
What are the key features of a word processor?
Probably the most popular productivity app
Initially designed as a replacement for the typewriter
Automation
Automatic end-of-line soft carriage return
Style sheets
Table of contents & index
Spelling & grammar checking
Two approaches: WYSIWYG (e.g. Word, WordPerfect, Star) or traditional markup
(LaTeX)?
Desktop publishing
Spring 2009
What is the key feature of batch programs?
These are typically started from a shell (or automatically via a scheduler) and tend to
follow a pattern of:
Initialize internal data
Read input data
Process that data
Print or store results
Key feature: No user interaction with the computer while the program is running
Name two languages which are used for client side scripting?
Java script –vb script
What is the purpose of MODEM ?
modem = modulator + demodulator
Modulator converts computer messages to electrical pulses that are suitable for
transmission over the telephone lines
Demodulator converts electrical pulses received over telephone lines into messages that
are comprehensible for computers
What is Home Page of a web site?
A Web site is a related collection of World Wide Web (WWW) files that includes a
beginning file called a home page
Why microprocessor uses the binary number system and not the decimal or any other number system?
Because this system is natural for digital computers
The fundamental building block of a digital computer – the switch – possesses two
natural states, ON & OFF
What is the difference between Interactive-mode and Batch-mode Application Software?
The user runs the program on the computer and keeps on interacting with the computer
while the program runs
Example: Word processor
Batch-mode
The user starts the program and the computer processes the provided data and produces
results without any further intervention of from the user
Example: Payroll
Spring 2009
What is the problem with Brute Force Strategy approach?
A strategy in which all possible combinations are examined and the best among them is
selected
What is the problem with this approach?
A: Doesn't scale well with the size of the problem
How many possible city sequences for n=6? For n=60? For n=600?
What was the name of first computer in which binary numbers were used instead of decimal numbers ?
The Atanasoff-Berry Computer was the world's first electronic digital computer. It was
built by John Vincent Atanasoff and Clifford Berry at Iowa State University during 1937- aaaaaahm
How can we say that JavaScript is Not Object-Oriented language?
avascript does provide a fairly easy means to inherit implementation via prototyping but this is at the expense of encapsulation.
List down the names of any three parameters on which we analyze an algorithm.
Write differences between Shareware and Trialware software.
Mainly the name and the fact that no large successful companies refer to their trial or demo software as "shareware". See Symantec for example. The term "shareware" is also old-fashioned and non-descriptive. The word "shareware" was coined to describe software that was obtained and then shared freely with others, usually by diskette. Today with the Internet this meaning is entirely obsolete. Plus, the reference to sharing might give people the impression that it is OK to purchase shareware and then share the registered copy with others. Trialware, on the other hand, means what it says, trial
What is function of Goal Seek command in Excel?
Goal Seek is used when you know what answer you want, but don't know the exact figure to input for that answer. For example, you're quite certain that 8 multiplied by something equals 56. You just not sure what that missing number is. Is it 8 multiplied by 6? Or Is it 8 multiplied by 7? Goal Seek will tell you the answer
Question No: 27 ( Marks: 1 )
What is the key feature of batch programs?
Answer: The key feature is no user interaction with computer while a program is running.
Question No: 28 ( Marks: 1 )
Name two languages which are used for client side scripting?
Answer: Javascript , VBscript
Question No: 29 ( Marks: 2 )
What is the purpose of MODEM ?
Answer: It receive data analog signal from a phone line and then convert them into digital signal and send back to the computer with which it is attached. It also receives data from computer and convert it into analog signals.
Question No: 30 ( Marks: 3 )
What is Home Page of a web site?
Answer: For a web user it is a first page displayed when a user starts a web browser and for a web developer it is a first page when a user selects a site.
Question No: 31 ( Marks: 5 )
Why microprocessor uses the binary number system and not the decimal or any other number system?
Answer: Because this system is natural for digital computer. Digital computer have fundamental building blocks like ON & OFF Etc so it is natural to represent those in a number system that has only two symbols e.g Binary Numbers 0,1. Whereas decimal system is natural for human.
Spring 2010
CS101- Introduction to Computing (Session - 4)
Question No: 17 ( Marks: 2 )
Write the major types of softwares with examples?
Software is the set of instructions which guides the computer hardware through their jobs. A
computer is useless without software. We use different software to solve different problems. The types of
software we need depend on the job we want to do.
There are basically two types of software's system software and application software. System software's
are used to help the computer parts work together and also provide support to the application software.
The most common type of system software is operating system.
Application software's are used to improve our work ability. Different application software's and system
software's are used in daily life.
Question No: 18 ( Marks: 2 )
What is the major difference between paragraph <p> and Line Break <BR> tags?
<p> tag is use to Insert paragraph breaks into the text of your HTML document Note that this tag
is special in that it does not require an ending tag.
The <br> tag inserts a single line break. The <br> tag is an empty tag which means that it has no end tag.
Question No: 19 ( Marks: 2 )
Why PASCAL was designed and what is the problem with PASCAL?
Pascal was originally intended primarily as a teaching language, but it has been more and more often
recommended as a language for serious programming as well, for example, for system programming
tasks and even operating systems.
Question No: 20 ( Marks: 3 )
What are the key requirements of E-commerce Software?
There are more possible approaches depending to the specific context.
The information used for building a software system has more levels:
- Business process level (overall process of the customer business). This is the context where the future
software system will be activated
- Business needs allocated to the software system
- System features that will satisfy those business needs
- System feature details as SRS
Question No: 21 ( Marks: 3 )
Write down the pseudo code for the following flow chart.
Question No: 22 ( Marks: 5 )
(a) Write down two positive features of client-side scripting.
Client-side scripting offers an easy way to provide additional functionality and flexibility to your project.
Solved by Princess Sassi
HTML is very limited; its main purpose is to display and format content. It allows little or no interaction
with the visitors of your site.
Scripting technologies like JavaScript, JScript, VBScript and others are used on many sites to add extra
functionality to a web site. Ranging from simple mouse over image effects, animation, form field
validation to complex dynamic menu systems, these scripts enhances the functionality and user
experience.
(b) Discuss two deficiencies of JavaScript.
Question No: 23 ( Marks: 5 )
What are the key features of a word processor?
Insert text: Allows you to insert text anywhere in the document.
delete text: Allows you to erase characters, words, lines, or pages as easily as you can cross them out on
paper.
cut and paste : Allows you to remove (cut) a section of text from one place in a document and insert
(paste) it somewhere else.
copy : Allows you to duplicate a section of text.
page size and margins : Allows you to define various page sizes and margins, and the word processor will
automatically readjust the text so that it fits.
search and replace : Allows you to direct the word processor to search for a particular word or phrase.
You can also direct the word processor to replace one group of characters with another everywhere that
the first group appears.
word wrap : The word processor automatically moves to the next line when you have filled one line with
text, and it will readjust text if you change the margins.
print: Allows you to send a document to a printer to get hardcopy.
file management : Many word processors contain file management capabilities that allow you to create,
delete, move, and search for files.
font specifications: Allows you to change fonts within a document. For example, you can specify bold,
italics, and underlining. Most word processors also let you change the font size and even the typeface.
footnotes and cross-references: Automates the numbering and placement of footnotes and enables you to
easily cross-reference other sections of the document.
graphics graphics: Allows you to embed illustrations and graphs into a document. Some word processors
let you create the illustrations within the word processor; others let you insert an illustration produced by
a different program.
headers , footers , and page numbering: Allows you to specify customized headers and footers that the
word processor will put at the top and bottom of every page. The word processor automatically keeps
track of page numbers so that the correct number appears on each page.
layout : Allows you to specify different margins within a single document and to specify various methods
for indenting paragraphs.
macros : A macro is a character or word that represents a series of keystrokes. The keystrokes can
represent text or commands. The ability to define macros allows you to save yourself a lot of time by
replacing common combinations of keystrokes.
merges: Allows you to merge text from one file into another file. This is particularly useful for generating
many files that have the same format but different data. Generating mailing labels is the classic example
of using merges.
spell checker : A utility that allows you to check the spelling of words. It will highlight any words that it
does not recognize.
tables of contents and indexes: Allows you to automatically create a table of contents and index based on
special codes that you insert in the document.
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