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Tuesday, 24 January 2017

IPU BCA Semestr 6 - Linux Environment - Salient Features of Linux Operating System

Salient Features of Linux Operating System

IPU BCA Semestr 6 - Linux Environment - Salient Features of Linux Operating System

Linux operating systems has world wide use. It’s the operating system used by more than 95% of the world’s supercomputers. World's leading IT companies like Google, Facebook, Netflix use Linux extensively. Android OS is another flavour of Linux OS.
Following are the important features of Linux Operating System:

Multitasking: several programs run at the same time.

Multiuser : several users can work on the same server machine at the same time (and no two-user licenses!).

Multi-platform: runs on many different CPUs, not just Intel.

Multiprocessor/multi-threading: it has native kernel support for multiple independent threads of control within a single process memory space.

Protected Memory Process: It has memory protection between processes, so that one program can't bring the whole system down.

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Monday, 23 January 2017

IPU BCA Semester 6 - Linux Environment - Understanding Run Levels

Understanding Run Levels

Linux Environment
IPU BCA Semester 6 - Linux Environment - Understanding Run Levels
bum tool (Boot Up Manager in Ubuntu showing
what services run under different run levels)

Question: What are different run levels in Linux OS?

Answer: Linux is a multi user and multi tasking operating system. Multiple users can login and work simultaneously on a single server. However there are requirements when a single user alone should work (generally for administration purposes). Linux run levels are the modes that allow you to define whether Linux OS environment is available for all users  or just a single admin user, or it will provide network services or graphic desktop support.

During kernel boot, the process 'init' supports multiple run levels as parameters i.e. 0 to 6.
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Saturday, 21 January 2017

IPU BCA Semester VI - Multimedia And Its Applications - End Term Paper (2015)

END TERM EXAMINATION
BCA Semester VI
MAY-JUNE 2015

Multimedia And Its Applications

IPU BCA Semester VI - Multimedia And Its Applications - End Term Paper (2015)


Time: 3 Hrs                              Maximum Marks: 75

Note: Attempt any five questions including Q No. 1 which is compulsory.

Question 1: Answer the following questions: (2.5 × 10 = 25)

(a) Explain how multimedia is different from graphics.
(b) Give various applications of multimedia.
(c) Explain the concept of Virtual Reality.
(d) Give short note on plug-ins.
(e) Give role of media games.
(f) Differentiate between analog and digital elements.
(g) What do you understand by the term data compression?
(h) Which one is better - lossy and lossless compression technique and why?
(i) Give short note on HTML
(j) Differentiate between temporal and non-temporal media.


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Friday, 20 January 2017

IPU BCA Semester 6 - Mobile Computing - Impact On Mobile Computing Design and Functionality

Impact On Mobile Computing
Design and Functionality

Mobile Computing 
IPU BCA Semester 6 - Mobile Computing - Impact On Mobile Computing Design and Functionality



Question: What is the impact on mobile computing devices design and functionality in the following context?
(a) Power Consumption
(b) Device Vulnerability
(c) User Interface
(d) Memory


Answer: While design a functionality for a mobile device, one need to consider the various aspects, such as

(a) Power Consumption:
- Mobile computing devices generally have limited battery capacity
- Due to limited power supply, its computing power is also limited.
- It also has impact on size of display screens.
- Due to lower power supply, there are fewer input-output (I/O) device options.

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Thursday, 19 January 2017

IPU BCA Semester 6: Linux Environment (End Term Paper 2014)

END TERM EXAMINATION
Sixth Semester - BCA
May-June 2014
Paper Code: BCA-306 

Subject: Linux Environment 

(2011 onwards)
IPU BCA Semester 6: Linux Environment (End Term Paper 2014)

Time: 3 Hours Maximum Marks: 75

☛Note: Attempt any five questions including Q.1 which is compulsory-. Select one question from each unit.

Q1:
(a) Explain the architecture of Linux. (5)
(b) What are the different ways of managing and switching users in Linux? (5)
(c) Differentiate between TCHS and Korn Shell.  (5)
(d) How Linux and Unix related. Explain.  (5)
(e) What is the process in Linux? Explain briefly.  (5)

UNIT - I

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Monday, 16 January 2017

BCA Semester VI - Multimedia and Its Applications - Macintosh vs Windows

 Macintosh vs Windows

BCA Semester VI - Multimedia and Its Applications - Macintosh vs Windows


Macintosh Windows
1) Major focus is on quality rather than quantity. 1) Quantity is considered as a major criteria.
2) Good quality in built-in Audio. 2) No built-in Audio in early versions.
3) Requires Mouse Input. 3) Requires Keyboard Input.
4) More straightforward approach for computing. Fewer maintenance tasks are present. 4) High Maintenance tasks are present.
5) Fewer Viruses, More Secure. 5) Virus attacks are still high.
6) Provides Unix-like experience, commercial applications are available. 6) A lot different than UNIX.
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IPU BCA Semester 6: Linux Environment - Linux Boot Sequence

Linux Boot Sequence

IPU BCA Semester 6: Linux Environment - Linux Boot Sequence

Question: Describe the Linux Boot process.

Answer: Following figure shows the sequence of booting process in Linux environment.


1. When the machine is powered on, the ROM chip (firmware) executes BIOS (Basic Input/Output System) or UEFI (Intel’s Unified Extended Firmware Interface). BIOS detects the hardware and initializes the basic input output devices.
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