Post Test Date Columns example essay topic

Table of Contents 1. Introduction 2. Testing Procedure 3. Hardware and Software Compliance 4. Summary 1. Introduction Year 2000, Y 2 K or Millennium Bug!

What is it It is a problem resulting from the common programming practice of using only two-digits to store the year in software. The practice dates back to the 1950's when computers began to be used for business purposes. Using two digits for dates is benign and causes no harm so long as the next year is a larger number than the current year. For example software applications that use dates have no problem with the sequence of 95, 96, 97, 98 and 99.

However, when the century ends, the year 2000 will be stored as 00. Calculations or decisions, based on dates or time periods, can go seriously wrong. How is it fixed In regard to personal and small business computers, the problem is three fold. Firstly, the computer hardware must report the current date correctly. Many computers, especially early Pentiums, 486,386 and 286 based machines, will on the 1st January 2000 Revert back to 1 April 1980 or some other date. Thus creating a potential problem until the correct date is re-entered - provided of course that the computer can be set manually to a date beyond 311299.

Calculation of Leap Year dates may also be incorrect on some computers. Secondly, the computer software must carry out the correct calculations based on a four-digit year (e.g. 1999 or 2000 etc) rather than just using the last two digits. The supplier or manufacturer of the software should be approached to ascertain the compliance of their code, or their schedule to have it corrected and distributed. Thirdly, your data must be in the correct format - namely year described as a four-digit number. If your dates have been entered as described above (that is 15th Feb 1955 entered as 150255), then you have a dat conversion to be carried out. Testing Procedure To determine if Windows NT 4.0, Win 95 and would roll to the appropriate date, the control panel applet "DATE&TIME" (d&t) was used to change the dates.

The machines d&t were set to the day before each date outlined in the memo. The machine date was changed to a control time of 11: 59: 45 PM in each case. The machine date was then allowed to roll to the date in question. The machine d&t was then reset to the previous date and control time.

This time the machine was rebooted while the time was rolling to the date in question. In each case, after the time rolled, the date was checked to find the correct date. WinNT and Win 95 Explorer was then opened and a file in the 'c: winnt' and 'c: windows' directory was changed to check whether or not a saved file corresponded with the correct date. The data from these tests is defined in the following table. 'Data & Time Tested' column are the Control values found in the memo.

Both 'Post Test Date' columns are the dates found in each instance after the date rolled from the 'Date&Time Tested' column to the date in question. The 'Post Explorer check' was tested to see if the machine reported the right time. 'Post modification dates' are file dates after the file was saved to check the corresponding date. In each test, no problems with the d&t were encountered. Results: The testing actually caused several different things to happen to the OS. Whenever I rolled the date forward, The following directories changed the date associated with them: Windows NT Test C: Winnt, C: Winnt System 32, C: Winnt Fonts, C: Temp.

Windows 95 Test C: Windows, C: Windows System, C: Windows Fonts, C: Temp This seemed strange because the machine time stamp wouldn't roll back when the time was changed backwards, but this isn't part of the test procedure. When the time actually changes the date will roll forward and stay. It won't roll backwards. I don't know if this affects the testing but it would be totally impossible to rebuild the machine each time the test was run. This would take many hours to do and it probably won't affect the data anyway. Before I started testing, I looked on the Internet to see what Microsoft said about WinNT 4.0, Win 95 and the y 2 k problem.

On this site, there are links to all Microsoft Products. For WinNT 4.0, there were 4 problems Microsoft listed as known problems. They are as follows: 1. When you set an account to expire on Feb 29, 2000, User manager displays the following error. 'February only has 28 days in this year'. Taken from document Q 183125 from Microsoft Tech support for Year 2000 2.

Windows NT might skip a day. When rolling to new dates NT may skip several days ahead. Taken from document Q 180122 from Microsoft Tech support for Year 2000 3. When you use the Winnt Find Files or folders feature, the 2-digit abbreviation of the year doesn't appear correctly. For example, if the year is set to 2001, when you click on the DATE MODIFIED tab on the Find: ALL files dialog box, the two digit abbreviation of the year appears as: 1, rather that 01. Taken from document Q 183123 from Microsoft Tech support for Year 2000.4.

When you define a custom property to include a date type in the Microsoft Office the year may not appear correctly. For example, in Word, if you click properties on the file menu, click the custom tab, click date in the type field, enter a value of 01/01/01, and then click add, the date appears as 01/01/1901 rather that 01/01/2001. Taken from document Q 183125 from Microsoft tech support for Year 2000 For Windows 95 operation ing system there were 2 problems listed. 1. The DIR command displays file dates using only two digits to represent the year, instead of four digits. 2.

When you use the DATE command to set the current date and you type the year as only two digits from 00 through 79, the DATE command displays the error message "Incorrect date format". (These documents are included with this report) In each case, Microsoft states that if you are having these problems, installation the next service release should fix these problems although, this release isn't available yet. During testing, I checked for 2 of 4 problems and in each case didn't find them. I left out items 1, 4. Item 1 was left out because in our operation we don't set Local accounts to expire, we use the Domain model so this testing is more appropriate on the server, so this isn't an issue with WinNT 4.0 workstation.

Item 4 was left out because it pertains to Microsoft Office, which clearly isn't part of WinNT 4.0 workstation. Microsoft also states that they have posted 2 hotfix patches that are in BETA to correct these problems. They then further state that since these drivers are in BETA, do not install unless you are experiencing these problems. I didn't have any of these issues, so I didn't install the patch. In conclusion, Windows NT workstation has a few minor issues pertaining to the year 2000, but Microsoft promises to have a Service release available to correct these problems. In the test, only 2 of the 4 given problems were investigated, the other 2 don't affect this operation.

For each set of 'Control Data' a result was given in a table format. From these numbers it can be shown that WinNT 4.0 passed the test outlined in the year 2000 memo. Microsoft's known problems were addressed as they applied. Since 2 of the tests didn't apply, they weren't used the other 2 were tested and found that we were not experiencing these issues. From this I can safely state that in worst case only a few machines, if any, will be affected by y 2 k. If we have machines that are affected, the Service Pack that Microsoft is supposedly releasing should fix these issues.

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