why did Microsoft use the name Windows 7?

First Windows version was Windows 1.0. Second was Windows 2.0 and third was Windows 3.0. When Windows NT was released, it was code versioned as Windows 3.1. Windows 95, 98, 98 SE and ME (Millennium Edition) were code versioned as Windows 4.0 as all were using Non-NT kernel or 9x kernel.
Windows 2000 was code versioned as Windows 5.0 and Windows XP as Windows 5.1. Next version was Windows Vista which was code versioned as Windows 6.0. Since Windows 7 is the next Windows version, Microsoft decided to call it Windows 7 for easy and better understanding.

1.0: Windows 1.0
2.0: Windows 2.0
3.0: Windows 3.0
3.1: Windows NT
4.0: Windows 95, 98, 98SE, ME
5.0: Windows 2000
5.1: Windows XP
6.0: Windows Vista
7.0: Windows 7

         8.0: Windows 8

CEO of different IT companies

Here is a list of present chief executive officers[CEO] of IT Companies.

1. Accenture - William D. Green
2. Adobe Systems - Shantanu Narayen
3. Alcatel-Lucent - Ben Verwaayen
4. Amazon.com - Jeff Bezos
5. AMD - Dirk Meyer
6. Analog Devices - Jerald G Fishman
7. Anil Dhirubhai Ambani Group - Anil Ambani
8. Apple Inc. - Steve Jobs
9. AT&T - Randall L. Stephenson
10. Bharti Telecom - Sunil Bharti Mittal
11. Borland - Tod Nielsen
12. Cisco Systems - John Chambers
13. Cognizant Technology Solutions - Francisco D'Souza
14. Compuware Corporation - Peter Karmanos, Jr.
15. Dell Inc - Michael Dell
16. Digg - Jay Adelson
17. eBay - John Donahoe
18. Electronic Arts - John Riccitiello
19. Ericsson - Carl-Henric Svanberg
20. Facebook - Mark Zuckerberg
21. Free Software Foundation - Richard Stallman
22. General Motors - Edward Whitacre, Jr.
23. Google - Eric E. Schmidt
24. HCL Technologies - Vineet Nayar
25. Hewlett-Packard - Léo Apotheker
26. Honeywell - David M. Cote
27. IBM - Samuel J. Palmisano
28. Infosys Technologies Limited - Kris Gopalakrishnan
29. Intel - Paul Otellini
30. Microsoft - Steven Anthony Ballmer
31. Motorola - Greg Brown
32. Mozilla - Mitchell Baker
33. MySQL AB - Marten Mickos
34. MySpace - Chris DeWolfe
35. Nokia - Stephen Elop
36. Nortel - Mike S. Zafirovski
37. Nintendo - Satoru Iwata
38. Oracle Corporation - Larry Ellison
39. Patni Computer Systems - Narendra Patni
40. Pixar - Steve Jobs [Former CEO,Now Walt Disney took over it]
41. Reliance Industries Limited - Mukesh Ambani
42. Samsung - Kun-Hee Lee
43. SAP AG - Henning Kagermann
44. Seagate Technology - Steve Luczo
45. Sony - Howard Stringer
46. Sony Computer Entertainment - Kazuo Hirai
47. Sun Microsystems - Jonathan I. Schwartz
48. Tata Consultancy Services - N Chandrasekaran
49. Twitter - Jack Dorsey
50. Verizon - Ivan Seidenberg
51. Viacom - Philippe P. Dauman
52. Vodafone - Vittorio Colao
53. Wipro Technologies - Girish Paranjpe and Suresh Vaswani
54. Yahoo! - Carol Bartz
55. YouTube, LLC - Salar Kamangar

 
note: The list is last updated on November 2010.

most common interview mistakes

(a). Arriving late.
(b). Dressing wrong :  make powerfully positive. Dress right in a conservative suit, subdued colors, little jewelry (but real gold, or silver, or pearls), low heels (polished) and everything clean and neat.
(c). Play zombie : If you are nervous you can't smile and make the eye contact
(d). No smoking, no gum, no drinking.
(e). Research failure : Find out the company's products and services, annual sales, structure and other key information
(f). Can't articulate your own strengths and weaknesses.
(g). Winging the interview : Write out any answers you have difficulty with, and practice until your delivery is smooth (but not slick).
(h). Talk, Talk, Talk.  : interrupting the interviewer and answering to a simple question with a fifteen-minute reply
(i). Failure to connect you to the job offered.
(j). Not asking questions - and asking too many : Use your research to develop a set of questions that will tell you whether this is the job and the company for you.
(k). Bad-mouth anyone : You don't want to look like a complainer.
(l). Asking about compensation and /or benefits too soon.
(m). Failure to ask for the job :  when the interview over, convey your interest in the job and ask what the next step is.