HSST & NET COMPUTER SCIENCE Exam Preparation

Android Operating System : Some Facts

2012-02-16T02:25:00.000-08:00

What is Android?

Android is a Linux-based operating system for mobile devices such as smart phones and tablet computers. It is developed by the Open Handset Alliance led by Google.

Some History about Android

Android, Inc. was founded in Palo Alto, California, United States in October, 2003 by Andy Rubin (co-founder ofDanger),Rich Miner (co-founder of Wildfire Communications, Inc.), Nick Sears (once VP at T-Mobile) and Chris White.

Acquisition By Google

Google acquired Android Inc. on August 17, 2005, making Android Inc. a wholly owned subsidiary of Google Inc. Key employees of Android Inc., including Andy Rubin, Rich Miner and Chris White, stayed at the company after the acquisition.

Android Versions and its Pet Names

2.3 Gingerbread

3.0 Honeycomb

4.0 Ice Cream Sandwich

Courtesy : Wiki pedia

.DMG Vs .EXE

2012-02-14T06:21:00.000-08:00

What the exetensions .dmg and .exe mean ?

.exe files are windows executables; they need windows to run.

.dmg are Apple Disk Image files, which can contain mac executables and/or other data.

ACID Property : Database Transactions

2012-02-06T20:58:00.000-08:00

ACID is a set of properties that guarantee database transactions are processed reliably.

Atomicity

Atomicity requires that database modifications must follow an "all or nothing" rule. Each transaction is said to be atomic. If one part of the transaction fails, the entire transaction fails and the database state is left unchanged. An atomic system must guarantee atomicity in each and every situation, including power failures, errors, and crashes. This guarantees that a transaction cannot be left in an incomplete state.

Consistency

The consistency property ensures that any transaction will bring the database from one valid state to another. Any data written to the database must be valid according to all defined rules, including but not limited to constraints, cascades, triggers, and any combination thereof.

Isolation

Isolation refers to the requirement that no transaction should be able to interfere with another transaction. No transactions that affect the same rows can run concurrently, since their sequence, and hence the outcome, would be unpredictable. This property of ACID is often partly relaxed due to the huge speed decrease this type of concurrency management entails.

Durability

Durability means that once a transaction has been committed, it will remain so, even in the event of power loss, crashes, or errors. In a relational database, for instance, once a group of SQL statements execute, the results need to be stored permanently. If the database crashes immediately thereafter, it should be possible to restore the database to the state after the last transaction committed.

Objective Question Bank for HSST Computer Science By Post

2012-02-02T18:10:00.001-08:00

Please send your details with PIN code to get Objective Question Bank for HSST Computer Science By Post at psctrainer@ymail.com . Need to pay only carrying charge.

Operating System By Silberschatz and Galvin

2012-02-01T17:47:00.001-08:00

Addison Wesley - Silberschatz, Galvin, Gagne - Operating System Concepts, 7th Ed.pdf

docs.rapidlibrary.com

Haptics and Virtual Reality

2012-01-29T17:15:00.000-08:00

What is Haptics ?

Haptic technology, or haptics, is a tactile feedback technology which takes advantage of the sense of touch by applying forces, vibrations, or motions to the user.The word haptic, from the Greek ἁπτικός (haptikos), means pertaining to the sense of touch and comes from the Greek verb ἅπτεσθαι haptesthai, meaning to contact or to touch.

Virtual reality

Haptics are gaining widespread acceptance as a key part of virtual reality systems, adding the sense of touch to previously visual-only solutions. Most of these solutions use stylus-based haptic rendering, where the user interfaces to the virtual world via a tool or stylus, giving a form of interaction that is computationally realistic on today's hardware. Systems are being developed to use haptic interfaces for 3D modeling and design that are intended to give artists a virtual experience of real interactive modeling. Researchers from the University of Tokyo have developed 3D holograms that can be "touched" through haptic feedback using "acoustic radiation" to create a pressure sensation on a user's hands.

Courtesy : Wikipedia

UGC - JRF & NET Coaching in Computer Science 2012 in Calicut

2012-01-29T04:48:00.001-08:00

UGC - JRF & NET Coaching in Computer Science 2012 based on New Exam Pattern.

UGC - JRF & NET Coaching in Computer Science 2012 New batch is likely to start from next week onwards at Farook College . Classes on all Sundays. Second Saturday and Govt Holidays.Coaching Sessions are handled by eminent teachers ( Phd Holders ) . contact no 9809805202

Organized by YES India Computer Science Forum
Al-Farook Education Centre
Farook College

Asynchronous transmission Vs Synchronous transmission

2012-01-25T23:32:00.000-08:00

Asynchronous transmission refers to the case when the sender commences transmission of bytes at any instant of time. Asynchronous transmission uses start and stop bits to signify the beginning bit. ASCII character would actually be transmitted using 10 bits. For example, "0100 0001" would become "1 0100 0001 0". The extra one (or zero, depending on parity bit) at the start and end of the transmission tells the receiver first that a character is coming and secondly that the character has ended.

Synchronous transmission uses no start and stop bits, but instead synchronizes transmission speeds at both the receiving and sending end of the transmission using clock signal(s) built into each component. A continual stream of data is then sent between the two nodes. Due to there being no start and stop bits the data transfer rate is quicker although more errors will occur, as the clocks will eventually get out of sync, and the receiving device would have the wrong time that had been agreed in the protocol for sending/receiving data, so some bytes could become corrupted (by losing bits).

A unique sequence of fixed number of bits , called flag is prefixed to each data block , called frame . The receiver first detects the flag bits and then identifies the boundaries of frame.

Function overloading Vs Operator overloading

2012-01-24T17:41:00.000-08:00

C++ enables several functions of the same name to be defined, as long as these functions have different sets of parameters. This capablity is called function overloading. When an overloaded function is called, the C++ compiler selects the proper function by examining the number, types and order of the arguments in the call ie the signature of the function.

Operator overloading allows existing C++ operators to be redefined so that they work on objects of user defined classes.

What is Java ?

2012-01-21T22:14:00.000-08:00

Java is an object oriented programming language developed initially by James Gosling and colleagues at Sun Microsystems. The language initially called Oak ( named after oak trees Gosling's office premises ) , was intended to replace C++. Recently Sun Microsystems acquired by Oracle.

Re Test For HSST Computer Science

2012-01-09T18:07:00.000-08:00

Finally Kerala PSC decided to conduct a re test for HSST computer Science .It is based on the various allegations . The main allegation was that most of the questions were copied from one guide published by GK publishers in Noida .

So let us ready for another Exam.

Best Wishes.
Courtesy : Malayala Manorama and Madhyamam Daily News dt 10/01/2012

What is a DirectX?

2012-01-06T05:58:00.000-08:00

DirectX is a Windows technology that enables higher performance in graphics and sound when you are playing games or watching video on your PC.

Farewell to 2011 & Welcome 2012

2011-12-31T03:06:00.001-08:00

Wish You & Yours a Very Happier and Prosperous New Year...

A piece of technology could help a new generation discover how to program computers.

2011-12-25T05:32:00.000-08:00

What is Google Doodle ?

2011-12-23T18:08:00.000-08:00

The holiday Google Doodle has arrived. Call it an early Christmas present -- complete with interactive flashing lights and the tune “Jingle Bell"

Free Computer Course From Stanford University

2011-12-18T06:03:00.000-08:00

What is Geotagging ?

2011-12-08T17:20:00.000-08:00

Geotagging (also written as GeoTagging) is the process of adding geographical identification metadata to various media such as a geotagged photograph or video, websites, SMS messages, QR Codes or RSS feeds and is a form of geospatial metadata. These data usually consist of latitude and longitude coordinates, though they can also include altitude, bearing, distance, accuracy data, and place names.

Geotagging can help users find a wide variety of location-specific information.

Quiz on Information Technology

2011-12-05T17:15:00.000-08:00

IT Quiz Questions for Schools on JAVA

Posted: 04 Dec 2011 08:24 PM PST

1. Java programming language developed by
A. James Gosling

2. Java is initially called as
A. Oak

3. JVM stands for
A. Java Virtual Machine

4. After compilation of Java Code we get
A. Byte Code

5. Java is most popular web development tool because of its
A. Platform Independence

IT Quiz Questions for Schools on Linux

Posted: 04 Dec 2011 07:38 PM PST

1. Linux OS developed by
A. Linus Torvald ( Finland )

2. Debian , Fedora and Suse are
A. Linux Distributions

3. eg.s of Linux Desktop environment are
A. KDE and GNOME

4. Image Retouching and editing tool in Linux
A. GIMP

5.Founder of GNU Project
A. Richard Stallman

More >>

IT Quiz Questions for Schools on Apple Computer

Posted: 04 Dec 2011 07:14 PM PST

1. Founders of Apple Computer , Inc
A. Steve Jobs , Steve Wozniak , Ronald Wayne

2.Apple Computer , Inc is established on
A. April1, 1976

3. Head Quarter is located at
A. Cupertino, California

4. First PC introduced by Apple
A. Apple I

5. C.E.O of Apple Computers
A. Tim Cook

More >>

IT Quiz Questions for HSS on Super Computer

Posted: 04 Dec 2011 05:27 PM PST

1. First Super Computer designed by
A. Seymour Cray

2.Fastest Super Computer in the world
A. K Computer ( Fujitsu , Japan )

3. Processing techniques used in Super Computer
A. Parallel Processing

4. Speed of Super Computer is measured in
A. FLOPS(FLoating Point Operations Per Second)

5. worlds fastest supercomputer K Computer at
A. 10.51 peta FLOPS

IT Quiz Questions 2011 - 12

2011-12-03T18:17:00.000-08:00

IT Quiz Questions for Schools on Internet

Posted: 03 Dec 2011 05:48 AM PST

1. What W3C stands for?

A.World Wide Web Consortium

2. Director of W3C ?

A.Tim Berners-Lee

3. Inventor of WWW?

A. Tim Berners Lee

4. Software used for viewing webpages are called ?

A. Web Browser

5. Name the Browser developed by Apple ?

A . Safari

IT Quiz for School Students

IT Quiz Questions for Schools on Google

Posted: 03 Dec 2011 05:22 AM PST

1.www.google.com domain went online in ..?

A.15-sep-1997

2.Which year Google acquired blogger.com ?

A. Feb 2003

3. Google advertisement program ?

A. Adwords

4. Google ads publisher program ?

A. Adsense

5. Search algorithm employed in google search engine ?

A. Page Rank Algorithm

IT Quiz Questions for Schools

Posted: 02 Dec 2011 05:47 PM PST

1. Mobile operating system developed by google?
A. Android

2. What the word 'Wiki' Stands in Wikipedia?
A. Quick

3. Who is the father of computer Science?
A. Alen Turing

4. Award known as 'Nobel Prize ' in Computer Science
A. Turing Award

5. Founder of Wiki Leaks
A. Julian Asange.

6. New Operating System from Apple
A. Lion

7. Father of Artificial Intelligence?
A. John Mcarthy

8. Bing is the search engine developed by
A. Microsoft

9. In Which year first email was sent ?
A. 1971

10. Who invented Difference Engine
A. Charles Babbage

Cloud Computing Vs Grid Computing

2011-11-23T05:12:00.000-08:00

Cloud computing

Cloud computing is the use of a 3rd party service(Web Services) to perform computing needs. Here Cloud depicts Internet . With cloud computing, companies can scale up to massive capacities in an instant without having to invest in new infrastructure. Cloud computing is benefit to small and medium-sized businesses. Basically consumers use what they need on the Internet and pay only for what they use.

Cloud computing incorporates infrastructure as a service (IaaS), platform as a service (PaaS) and software as a service (SaaS) as well as Web 2.0

Cloud computing eliminates the costs and complexity of buying, configuring, and managing the hardware and software needed to build and deploy applications, these applications are delivered as a service over the Internet (the cloud).

Example:

Amazon Web Services (AWS) – AWS delivers a set of services that together form a reliable, scalable platform ‘in the cloud’. These pay-as-you-use cloud computing services include Amazon S3, Amazon EC2, Amazon SimpleDB, Amazon SQS, Amazon FPS, and others.
Salesforce.com – Delivers businesses over the internet using the software as a service model.
Google Apps - Software-as-a-service for business email, information sharing and security

Grid computing

Grid computing is a form of distributed computing whereby resources of many computers in a network is used at the same time, to solve a single problem. Grid systems are designed for collaborative sharing of resources. It can also be thought of as distributed and large-scale cluster computing.

Cloud Computing Vs Grid Computing

The only differentiating factor between the two is the method it adopts for computing the tasks within their individual environments. In grid computing, a single big task is split into multiple smaller tasks which are further distributed to different computing machines. Upon completion of these smaller tasks, they are sent back to the primary machine which in return offers a single output.

Whereas a cloud computing architecture is intended to enable users to use difference services without the need for investment in the underlying architecture. Though, grid too offers similar facility for computing power, but cloud computing isn’t restricted to just that.

BOOKING STARTED FOR AKASH TABLET

2011-11-21T18:04:00.000-08:00

The much awaited India’s ultra low cost Aakash tablet is finally here and is creating ripples all around. Datawind launches Ubislate 7 in India as Aakash. DataWind Ltd, the leading developer of wireless web access products and services has come up with Aakash tablet.

BOOK TODAY ITSELF

India launches world’s cheapest $35 tablet PC meant for students

2011-10-08T19:37:00.000-07:00

Aakash UbiSlate 7 Specs:

• Hardware:

– Processor: 366 Mhz with Graphics accelerator and HD Video processor

– Memory (RAM): 256MB RAM / Storage (Internal): 2GB Flash

– Storage (External): 2GB to 32GB Supported

– Peripherals (USB2.0 ports, number): 1 Standard USB port

– Audio out: 3.5mm jack / Audio in: 3.5mm jack

– Display and Resolution: 7” display with 800×480 pixel resolution

– Input Devices: Resistive touch screen

– Connectivity and Networking: WiFi IEEE 802.11 a/b/g

– Power and Battery: Up to 180 minutes on battery. AC adapter 200-240 volt range.

• Software:

– OS: Android 2.2

– Document Rendering

• Supported Document formats: DOC, DOCX, PPT, PPTX, XLS, XLSX, ODT, ODP

• PDF viewer, Text editor

– Multimedia and Image Display

• Image viewer supported formats: PNG, JPG, BMP and GIF

• Supported audio formats: MP3, AAC, AC3, WAV, WMA

• Supported video formats: MPEG2, MPEG4, AVI, FLV

– Communication and Internet

• Web browser – Standards Compliance: xHTML 1.1 compliant, JavaScript 1.8 compliant

• Separate application for online YouTube video

• Safety and other standards compliance

– CE certification / RoHS certification

Other: Additional Web Browser: UbiSurfer-Browser with compression/acceleration and IE8 rendering.

PSC Published Answer key of HSST Computer Science Exam : 98/2011

2011-10-08T03:52:00.000-07:00

Finally Kerala PSC published the provisional keys for HSST Computer Science Exam : 98/2011. You can access it from

http://www.keralapsc.org/anskey%2011/98_11_pk.pdf

Compare it with the answer keys consolidated from this blog readers at
http://psctrainer.com/solved_cs.html

Best Wishes

Direct PhD at JNU, New Delhi, Last Date: 14th October, 2011

2011-10-07T19:25:00.000-07:00

Application Forms and Prospectus can be obtained through Post by sending a request along with crossed Bank Draft for Rs. 300/- drawn in favour of Jawaharlal Nehru University payable at New Delhi along with a self-addressed (unstamped) envelope of minimum size of 30 x 25 cm with the words "Direct Admission to PhD Programme" inscribed on it to the Section Officer (Admissions), Room No. 28, Administrative Block, Jawaharlal Nehru University, New Delhi - 110067.

Application Forms and Prospectus will also be available at the Counter in the Administrative Block of the University on cash payment of Rs. 200/- per set from 10.00 a.m. to 1.00 p.m. and 2.00 p.m. to 4.00 p.m. on working days (Monday to Friday) during the following period: From 1st September to 14th October, 2011School of Computer & Systems Sciences

The School of Computer & Systems Sciences was established way back in 1975. It is one of the foremost institutions to start teaching and research programmes in the broad areas of computer science. The School has established itself as one of the most prestigious institutions in the area of computer education in the country. The School offers programmes of instruction and research leading to degree of MCA, M.Tech.(M.Phil.) and Ph.D. It attracts best of the students from all over the country. Every year around ten thousand students including applicants from the neighbouring SAARC countries, appear for the MCA and M.Tech. entrance examination. The popularity of the courses offered can be judged from the excellent (100%) placement of successful students in the best of the companies in the field of Computer Science and Information Technology. The graduates from the School have been placed in companies such as IBM, CSC, TCS, Flextronics, Siemens, HP, Parot Systems, CSG, Accenture, Cadence, Genpact, etc. The School has also trained students from foreign universities in the field of Computer Science.

The School continues to be at the forefront of offering interdisciplinary courses - a goal in JNU's charter. The School has the following specialized laboratories where M.Tech./M.Phil., Ph.D. students are actively engaged in research: Artificial Intelligence & Software Engineering, Data Communication and Networks, Microprocessor and Operating Systems, Multimedia & Modelling, Natural Language Processing, Parallel Processing and Distributed Computing, Systems Software.

THRUST AREAS: Computer Graphics, Databases, Data Mining, Data Warehousing, Knowledge Engineering, Mobile Networks, Modelling and Simulation, Natural Language Processing, Optimization Theory, Parallel and Distributed Computing.

(A) PROGRAMMES OF STUDY

(i) Direct Admission to Ph.D. Programme

Course Work - The selected candidates are required to take a minimum of six courses (including the seminar course of 3 credits) within first two consecutive semesters.

Successful completion of course-work is pre-requisite for confirmation in the Ph.D. programme. Due to the structure of the course work, admission to Direct Ph.D. programme is considered only in the Monsoon Semester.

(ii) M.Phil./Ph.D. and M.Tech/Ph.D. (Computer Science & Technology)

Category-I (through entrance examination): Candidates must appear in the written examination conducted by the University. Based on the written test, short-listed candidates will have to appear in the interview. Admission is offered to candidates, finally selected on the basis of their performance in the written test and the interview.

Each student aiming to obtain an M.Phil./Ph.D. or M.Tech./Ph.D should clearly mention the stream, viz M.Phil/Ph.D. or M.Tech./Ph.D. in the application form. No change-over from one stream to another will be allowed after the confirmation of the admission.

Category II (NET Qualified candidates) : Candidates who have qualified for Junior Research Fellowship through CSIR/UGC National Eligibility Test (NET) examination are eligible to apply separately in the prescribed form under this category. Candidates shall have to appear for an interview and their selection will depend on their performance in the interview. Candidates who have appeared in the CSIR/UGC NET examination but results awaited may also apply under this category. However, such candidates will be interviewed upon submission of a valid proof of having qualified for or awarded the JRF certificate at the time of interview. Moreover, only candidates with valid proof of JRF qualification would be provided permissible travelling allowance for attending interview. Please note that candidates who have been awarded "Lecturership" in the CSIR/UGC examination are not eligible and will not be interviewed.

Duration of Course: The course work shall be completed within first two consecutive semesters and the dissertation in the subsequent third and fourth semesters.

Credit Requirements: No student admitted to the programme shall be eligible for the award of M.Tech. degree unless he/she secures 50 credits in all out of which at least 30 credits shall be for course work, 5 credits for seminar and 15 credits for the dissertation. In some cases, if the students complete the course work with the CGPA of 6.5 or more the students may be permitted to register directly for Ph.D. without submitting an M.Tech. dissertation.

(iii) MCA (Master of Computer Applications)

Students are admitted to the MCA programme each year on the basis of their performance in the written test conducted by the University.

This three-year programme is designed to provide necessary theoretical background and practical experience in Computer Science and Applications to meet the growing manpower requirements in automatic computing.

SCHOLARSHIPS: Scholarships of the value of Rs.600/- per month will be awarded during the fifth and sixth semesters to those students of MCA programme who have met the prescribed grades/courses requirements.

(B) ELIGIBILITY FOR ADMISSION

(i) Direct Admission to Ph.D. Programme

The candidates interested in research in Parallel and Distributed Systems, Mobile Computing, NLP & Mobile Ad hoc Network, Databases, Data mining, Data Warehousing, Software Engineering, Scientific Computing/ Parallel Computing/Grid Computing, Support Vector Machine Methods, Neural Networks,Wireless Adhoc/Sensor Networks, Service Oriented Architecture, will be considered for Diret admission to Ph.D. progrmme this year.

Only those candidates shall be considered for Direct admission to the Ph. D. Programme who have —

a) obtained 2 years M.Tech./M.Phil degree of a recognized University/Research Institution, (except those who joined M.Tech. on or before 2002-2003) with minimum Final Grade Point Average (FGPA) of 6.00 in 10 point scale/comparable standard where the grading is based on system other than 10 point scale. The candidates who have obtained M.Tech./M.Phil. degree from a University/Institution where dissertation is not graded or grading is not on 10-point scale, are required to forward a copy of their M.Tech./M.Phil. dissertation along with the Application Form for the purpose of assessment of their credentials; OR
(b) at least 2 years research experience in reputed institutions with research publication(s) comparable to M.Tech./M.Phil. standard. In addition, they should have obtained Master's Degree with FGPA of 6.00 in the 10 point scale/comparable standard or equivalent percentage.

(ii) M.Phil./Ph.D. and M.Tech./Ph.D.:Master's degree in Computer Science or Mathematics or Statistics or Operational Research or in any branch of Science or Bachelor's degree in any branch of Engineering or Master of Computer Applications (MCA) with at least 55% marks.

(iii) M.C.A.: Bachelor's degree in any discipline with adequate competence in Mathematics under 10+2+3 pattern of education with at least 55% marks.

Courtesy : JNU Website

UGC NET Application : Important dates

2011-10-04T21:29:00.000-07:00

i) Last date for Applying On-Line : 25-10-2011

ii) Last date for receiving the printout of online Application Form (2 copies), Attendance Slip (one copy) and Admission Card (one copy) at the respective test centre opted by the candidate (with fee receipt & category certificate(s) ) : 31-10-2011