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Y2K Problem and Its Solution PowerPoint Presentation

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On : Jun 15, 2015

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Y2K Problem and Its Solution
Presentation Transcript

  • Slide 1 - Y2K (Year 2000 problem)
  • Slide 2 - Introduction The Year 2000 problem (also known as the Y2K problem) was a problem for both digital (computer-related) and non-digital documentation and data storage situations which resulted from the practice of abbreviating a four-digit year to two digits. This made year 2000 indistinguishable from 1900. The former assumption that a twentieth-century date was always understood caused various errors concerning, in particular, the display of dates and the automated ordering of dated records or real-time events.
  • Slide 3 - The Y2K problem will possibly have many serious effects upon many of the workings of everyday life around the world. The Y2K problem, commonly known as the Y2K "bug", occurs because the computer stores the date using two digits. The computer assumes the first two digits are 19 and stores the last two. (i.e. the year 1998 would be stored as 98).
  • Slide 4 - Businesses facing losing large amounts of money Businesses, big or small, do not like to lose mass amounts of money. The Y2K "bug" can affect a company, whether it is directly in contact with it or not.
  • Slide 5 - Computers started to reject credit card purchases. Their program not only checked that the credit card was valid; it checked whether the card would also be valid a few days in the future. When this day fell in the year 2000, a Y2K bug sprang to life and rejected cards in large numbers.
  • Slide 6 - The Y2K problem is a difficult problem to fix for many reasons. There are mass amounts of code that needs to be examined and fixed, poor coding practices used by coders in the past, poor design of older languages, problems with embedded code, and the tremendous amount of procrastinating prevalent in the industry on this problem.
  • Slide 7 - USED TO SOLVE THE YEAR 2000 PROBLEM DATE EXPANSION: Two-digit years were expanded to include the century (becoming four-digit years) in programs, files, and databases. This was considered the "purest" solution, resulting in unambiguous dates that are permanent and easy to maintain. However, this method was costly, requiring massive testing and conversion efforts, and usually affecting entire systems.
  • Slide 8 - USED TO SOLVE THE YEAR 2000 PROBLEM DATE RE-PARTITIONING: In legacy databases whose size could not be economically changed, six-digit year/month/day codes were converted to three-digit years (with 1999 represented as 099 and 2001 represented as 101, etc.) and three-digit days (ordinal date in year). Only input and output instructions for the date fields had to be modified, but most other date operations, and whole record operations required no change. This delays the eventual roll-over problem to the end of the year 2899.
  • Slide 9 - USED TO SOLVE THE YEAR 2000 PROBLEM WINDOWING: Two-digit years were retained, and programs determined the century value only when needed for particular functions, such as date comparisons and calculations. (The century "window" refers to the 100-year period to which a date belongs.) This technique, which required installing small patches of code into programs, was simpler to test and implement than date expansion, thus much less costly. While not a permanent solution, windowing fixes were usually designed to work for several decades.
  • Slide 10 - THANK YOU

Description : What is the Y2K Problem? Y2K problem also called "millennium bug". Watch this Y2K Problem ppt to know more about this.

Tags : Y2K | Year 2000 problem | Y2K bug | Y2K Problem | Millennium Bug | Y2K Solution | ERP | Y2K38 Problem