Saturday, July 4, 2009

CS101 subjective 3rdjuly

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Question No: 33 ( Marks: 2 )
What is spreadsheet? List any two jobs that it can do.
A spreadsheet is a grid that organizes data into columns and rows. Spreadsheets make it easy to display
information, and people can insert formulas to work with the data.

Electronic replacement for ledgers

Question No: 34 ( Marks: 2 )
In JavaScript, what is event handling? What are the two types of events?

Capturing events and responding to them
The system sends events to the program and the program responds to them as they arrive
Events can include things a user does - like clicking the mouse - or things that the system itself does -
like updating the clock.

Question No: 35 ( Marks: 3 )
Explain how many ways businesses monitor their employees?
• Systems are available that monitor almost every key stroke that an employee makes on a computer
• Systems are available that read and censor all incoming and outgoing eMail
• It is quite straight forward to monitor where you surf, and when

Question No: 36 ( Marks: 3 )
What is difference between Design and System Architecture?
A system architecture or systems architecture is the conceptual design that defines the structure and/or behavior of a system.
An architecture description is a formal description of a system, organized in a way that supports reasoning about the structural properties of the system
Designs it as an independent, selfcontained system

Question No: 37 ( Marks: 3 )
What are the Sub categories of Artificial Intelligence? Briefly explain any two.
Expert systems
Systems that, in some limited sense, can replace an expert
Automatic machines that perform various tasks that were previously done by humans
Pilot-less combat air planes

Decision Support Systems:
Interactive software designed to improve the decision-making capability of their users
Utilize historical data, models to solve problems

Question No: 38 ( Marks: 5 )
How many ways are there to call a function in a program ? Explain with example
Functions do not run automatically. When the page loads, each function waits quietly until it is told to run
Calling a Function From an Event Handler
An event handler is a command which calls a function when an event happens, such as the user clicking a button.
The command is written in the format onEvent, where Event is the name for a specific action. Here are some common examples:

Calling a Function From Another Function
function doSomething() {
doSomethingElse(); // This line calls the next function

Question No: 39 ( Marks: 5 )
Elaborate the ‘+ ’ operator and its constraints with the help of examples
The “+” String Operator
The “+” operator can be used to concatenate two strings
title = “bhola” + “continental”
The value of the variable title becomes “bholacontinental”

Question No: 40 ( Marks: 10 )
Write a JavaScript program having two functions sum and mean.
The web page will ask the user to enter five values to be added.
After taking input it will calculate the sum and mean of those values by calling sum and mean functions.

Question No: 41 ( Marks: 10 )
Define the following terms.
A named collection of properties(data, state) & methods (instructions, behavior)
Event Handler
An event handler is a command which calls a function when an event happens, such as the user clicking a button
Local Variable
Declaring variables (using the var keyword) within a function, makes them local•They are available only
within the function and hold no meaning outside of it
Scope of Variable
Defining the space in which a variable is effective is known as
defining the scope of a variable. A variable can be either local or global in scope
An indexed list of elements

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