Apple Lion OS X video

Apple Mac OS X 10.7 Lion is a newest desktop operating system.This eighth release of OS X brings us around 250 new features, many of which are inspired by Apple's mobile-device operating system,  It is certainly an improvement over the Snow Leopard. Right off the bat, the biggest difference is that it sports an option to have multiple desktop, just like the Android mobile operating system. Also, the buttons and scroll bars on the Lion is smaller. In fact the scroll bar disappear unless you start scrolling (you would have to use two fingers on the "magic mouse" to scroll. This can be kind of awkward.) This is a bugger if you are not use to the two finger scroll as you can't reach over to the side to make the scroll bar appear. Another difference that is widely touted feature is the ability to freely resize the desktop instead of constraining to the fixed ratios. Honestly, I don't see that much of a difference. Another visual difference is that it sports a separate "widget" desktop, which can be accessed by swiping the desktop to the right. It also have a new "mission control" (shown to the right) to view all the running apps.

Windows users will find the Mac very user unfriendly. First off, it does not have an aero snap. Also it does not have the task manager or a sidebar (although it has widgets that sit on a separate Window). Another difference is that the Mac does not have a lock feature where you could quickly lock the desktop (in Windows this is ctrl+L). However, it does have a new feature called hot corner where you just have to move the mouse to a designated corner perform a designated command such as log out, go to sleep, switch on screensaver, etc. In summary, the Mac OS X Lion is certainly a new and sparkly operating system but I belive it won't draw too many Windows users over to their camp. Each operating system have its own faults and flaws. It is best to stick to the operating system that you know as switching operating system can be a painful and long task.

How to Install Apple Mac OS X 10.7 Lion

Installing Lion is very easy. You just open the Mac App Store, buy the software and download it. The installer is downloaded to your Applications folder and added to the Dock. It runs automatically, but the installer disappears after it has run, so if you want to keep hold of it to upgrade other Macs or create a boot disc, quit the installer and copy it to an external drive before running.

The downloaded installer is around 3.76GB, which is about the same as a hi-def movie from iTunes. After buying it once, you can install it on all your Macs, so the £21 you paid for the operating system is an even bigger bargain.You’ll have a perfectly simple time installing the system with a rather simple looking installer app that give you the option of either installing by choosing an install disk or not doing so, no customizations anywhere.

 For more tips on Apple's new operating system check out this Mac OS X Lion Guide.

 Apple Mac OS X Lion New Features

  

1) Launchpad: 

  Launchpad is a new user interface component, which allows you to view the Applications on your computer in an iOS-like fashion. While I am not sure I will use this new interface, I like that Apple is trying to bridge the Desktop OS X and Mobile iOS worlds with a more consistent interface.

2) Mission Control:  Although this feature is a bit recycled from Exposé, I do enjoy the new look and organization of the application overview.

3) Easy Access to DVD Media: 

 When OS X Lion was first announced, there was a lot of uproar about the digital-only release. There were many who worried about how to do a fresh install of Lion on a new hard drive and the instruction, purportedly from Steve Jobs, that they install an old version of Mac OS then upgrade to Lion was met with a lot of online criticism. Most of those issues have since disappeared as Apple has provided a method, possibly unsupported, for creating a DVD image of the downloaded Lion installation. The steps are extremely easy and I had the DVD created within minutes of downloading. I tested the DVD on another Mac in my household, as the OS X license permits up to 5 installations, and the DVD worked without issues.

4) Full-screen Applications:  

The ability to load applications in full-screen was first introduced in iLife about a year ago and has now been extended throughout the OS. As someone who values screen real estate, the new feature is a welcome addition, especially if you are using an 11″ MacBook Air.

5) New Coat of Paint: The overall graphical interface for Lion is a lot more crisp and appealing, succeeding with that ‘lickable’ aspect Apple is known for.

6) Java Support: Like the DVD media issue, there were a lot of rumors predicting the end of Java on OS X Lion that have turned out to be false. Although there is some evidence to suggest Apple will be taking a backseat to integrating Java with the OS in the future, they have already posted a Java 1.6 release available as a separate download. They have also added an automatic download feature that detects when Java is required and automatically installs it. For example, the first time I started Eclipse, Java 1.6.0_26 (64-bit) was retrieved and installed within seconds. In short, Java is still very much alive and well in OS X Lion despite rumors to the contrary.

7)QuickTime:

 This was a pleasant surprise for me. After Apple axed QuickTime Pro’s quick and dirty editing features in favor of the stripped down QuickTime X I almost lost hope, but the new version of QuickTime offers really great drag and drop editing. It’s even resolution-independent, so it’s easy to take multiple clips with different original resolutions (like a screen capture, a video shot on your phone, and a high-res DSLR clip), lay some audio underneath, and export. So long iMovie! QuickTime also offers simple screen capture, video capture, and audio recording.

8)Performance : 

The only time I’ve felt like there was a hiccup in the system here now that I’m upgraded to Lion on my newest generation MacBook Pro is when I’m attempting to use gestures to get to Mission Control or the Launchpad. While this could very well be because my fingers weren’t working correctly, but I do dare to say that gestures aren’t perfect- especially when I need four fingers to perform what one could do with a simple move and a click. The software works fine, is the compatibility with the human brain that might not match up so well.Booting apps appears to be at least slightly quicker. The old go-to test for this is opening Photoshop, and I’m glad to say that before I updated, Photoshop (version CS4 is the one I’m using here) booted in about 30 to 40 seconds while now it’s down to about 20 or 15. Compared to 10 years ago that’s an absolute miracle. Compared to pre-Lion that’s a few extra bonus points. Furthermore moves seem swift, everything seems smooth and nice, animations appear flawless.

Apple Lion OS X video 

Now you can update your old Mac Book  here's everything you need to know about Apple's Lion OS X.

Give some popular Operating System's?

Some popular Operating System's are:

* Unix: multi-tasking, multi-processing, multi-user, protected, with built-in support for networking but not graphics.
* Windows NT: multi-tasking, multi-processing, single-user, protected, with built-in support for networking and graphics.
* Windows 95/98: multi-tasking, multi-processing, single-user, unprotected, with built-in support for networking and graphics.
* Windows 3.x: single-tasking, single-processing, single-user, unprotected, with built-in support for graphics but not networking.
* DOS: single-tasking, single-processing, single-user, unprotected with no built-in support for graphics or networking.
* NetWare: multi-tasking, multi-processing, single-user, unprotected, with built-in support for networking but not graphics.

 

Of personal computers run Windows with versions including Windows 3.x, 95.x, NT, 2000 and XP. Windows versions 3.x and earlier were actually operating environments - graphical interfaces that ran on topWell, Linux commonly pronounced IPA: /lnks/ in English; variants exist is a Unix-like computer operating system. Linux is one of the most prominent examples of free software and open source...


The purpose of an operating system is to:
1. control all the hardware components that are part of your computer.
2. manage a computer's ability to do several things at once
3. provide a base set of services to programs to keep software manufacturers from have to reinvent the wheel a million times for the same thing.

1) Linux is a open-source OS.People can change code and add programs which will help to use your computer better. It's designed as a reaction on the monopoly position of windows. you can't change any thing in windows. you can't even see which processes do what and build your onw extension. Linux wants the programmers to extend and redesign it's OS time after time, so it beats Windows or at least is as good as windows, but whit open-source, so you can see what happens and you can edit the OS.

2) All the flavors of Windows come from Microsoft, the various distributions of Linux come from different companies (i.e LIndows , Lycoris, Red Hat, SuSe, Mandrake, Knopping, Slackware)..

3) Linux is customizable in a way that Windows is not. For example,NASlite is a version of Linux that runs off a single floppy disk and converts an old computer into a file server. This ultra small edition of Linux is capable of networking, file sharing and being a web server..

4) For desktop or home use, Linux is very cheap or free, Windows is expensive. For server use, Linux is very cheap compared to Windows. Microsoft allows a single copy of Windows to be used on only one computer. Starting with Windows XP, they use software to enforce this rule (activation). In contrast, once you have purchased Linux, you can run it on any number of computers for no additional charge. .

5) You have to log on to Linux with a userid and password. This is not true of Windows. Typically Windows 9x does not ask for a userid/password at boot time and, even if it does, this can be easily bypassed. In general, Windows NT, 2000 and XP do require a userid/password to log on. However Windows 2000 and XP can be configured with a default userid and password so they boot directly to the Windows desktop. Windows XP, 2000 and Linux all support different types of users. Windows XP Home Edition supports Administrator class users that have full and total access to the system and restricted users that, among other restrictions, can't install software. Windows XP Pro and Windows 2000 support additional levels of users and there are groups of system privileges that can be assigned to a particular user. In Linux, the user with full and total access is called root, everyone else is a normal user. The options for Linux security privileges don't seem to me to be as robust as in Windows 2000 and XP Pro, they are focused on files and directories (can you read, update and execute files). Linux has a concept of a group of users that Windows does not, but again the privileges associated with a group are all file/directory related. ..

6) Linux has a reputation for fewer bugs than Windows ..

7) Windows must boot from a primary partition. Linux can boot from either a primary partition or a logical partition inside an extended partition. Windows must boot from the first hard disk. Linux can boot from any hard disk in the computer. 8) Windows uses a hidden file for its swap file. Typically this file resides in the same partition as the OS (advanced users can opt to put the file in another partition). Linux uses a dedicated partition for its swap file (advanced users can opt to implement the swap file as a file in the same partition as the OS).

Operating system is a software program which runs on your PC or computer, it enables computer hardware to work or operate with computer software.Operating System can be classified into multi-user, multi tasking and real time software.

Operating Systems provide a platform where all other programs (Applications) can run. As we know operating system of different types. GUI, Multi user and DOS command are few. Here are FAQ in interview for freshers.

OPERATING SYSTEM INTERVIEW QUESTIONS AND ANSWERS

(Q) What is kernel?

(A) Kernel is the core and essential part of computer operating system that provides basic services for all parts of OS.

(Q) What is difference between micro kernel and macro kernel?

(A) Micro kernel is a kernel which run services those are minimal for operating system performance. In this kernel all other operations are performed by processor.

Macro Kernel is a combination of micro and monolithic kernel. In monolithic kernel all operating system code is in single executable image.

(Q) Difference between multi tasking, multi programming and multi threading?

(A) Multi programming – By the name itself it shows that it is a technique of running several programs at same time using time sharing.

Multi tasking – It is a logical name for multi programming. Difference is the user can switch between two tasks while the program is in running state.

Multi threading – An application is generally implemented as separate process with several threads. Different application has different threads, one thread will be in wait state till other thread completes.

(Q) What is dead lock?

(A)  Deadlock is a situation or condition where the two processes are waiting for each other to complete so that they can start. This result both the processes to hang.

(Q) What are the methods of handling dead locks?

(A) Ensure that the system will not enter deadlock.

Recover the dead lock if it occurs.

See that no other process has to wait for other process to complete for longer time.

(Q) What is logical and physical addresses space?

(A) Logical address space is generated from CPU; it bound to a separate physical address space is central to proper memory management. Physical address space is seen by the memory unit. Logical address space is virtual address space. Both these address space will be same at compile time but differ at execution time.

(Q) What is starvation and aging?

(A) Starvation is Resource management problem where a process does not get the resources it needs for a long time because the resources are being allocated to other processes.

(Q) Which command is used to duplicate the entire diskette?

(A) While using DOS on PC diskcopy command is used.

(Q) What is virtual memory?

(A) Virtual memory is a technique which helps to get more memory than actual system memory; this is done using time sharing.

(Q) What is semaphore?

(A) Semaphore is a variable whose status reports common resource, semaphore is of two types one is Binary semaphore and other is Counting semaphore.

(Q) What is difference between binary semaphore and mutex?

(A) Mutex is used exclusively for mutual exclusion. Both mutual exclusion and synchronization can be used by binary. Mutex is given only through the task which takes mutex. Options for making the task which takes as DELETE_SAFE are provided by Mutex, which means the task deletion is not possible when holding the mutex.

(Q) What is the state of processor when a processor is waiting for some event to occur?

(A) Waiting state

(Q) What is fragmentation? Tell about different types of fragmentation?

(A) When many of free blocks are too small to satisfy any request then fragmentation occurs. External fragmentation and internal fragmentation are two types of fragmentation. External Fragmentation happens when a dynamic memory allocation algorithm allocates some memory and a small piece is left over that cannot be effectively used.  Internal fragmentation is the space wasted inside of allocated memory blocks because of restriction on the allowed sizes of allocated blocks.

(Q) What is DRAM?

(A) DRAM is cheap, it`s data resides in a cell made of a capacitor and a transistor. The capacitor tends to lose data unless it’s recharged every couple of milliseconds, and this recharging tends to slow down the performance of DRAM compared to speedier RAM types.