Database crash simulator (for training)?

Hi All
I would like to prepare for OCP (from 10g) exam. I there any software (free or commercial) to simulate some typical database crashes (lost redologs, lost datafile, lost controlfile and many other.). So that user should detect what has happened and correct the issue. Of course I can do it myself, but when you know what is exactly wrong, it is easy to correct as well.
Regards
Groxy

You can do it by yourself
I advice you to install VMware on your PC, install Oracle on it. SHutdown and copy whole Vmware folder to another directory.
THen open vmware and start your testing. If you'll do something that you can't recover, (of course, you have to do your best to recover crashed database) just close the vmware and delete it. And open another vmware and do your testings there
Kamran Agayev A. (10g OCP)
http://kamranagayev.wordpress.com

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    |   0 | SELECT STATEMENT                     |                        |      1 |        |   1027 |00:06:12.65 |      17M|     13M|   2400 |       |       |          |         |
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    |  12 |           TABLE ACCESS BY INDEX ROWID| XMVL_B                 |      1 |   2434 |    214K|00:00:00.47 |    3596 |      0 |      0 |       |       |          |         |
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    |  17 |         NESTED LOOPS                 |                        |      1 |     82 |      0 |00:00:00.05 |     555 |      0 |      0 |       |       |          |         |
    |  18 |          NESTED LOOPS                |                        |      1 |     82 |      0 |00:00:00.05 |     555 |      0 |      0 |       |       |          |         |
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    |  21 |           TABLE ACCESS BY INDEX ROWID| XMVL_B                 |      1 |     82 |      0 |00:00:00.05 |     552 |      0 |      0 |       |       |          |         |
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    |  24 |         TABLE ACCESS BY INDEX ROWID  | pi                     |      0 |      1 |      0 |00:00:00.01 |       0 |      0 |      0 |       |       |          |         |
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    |* 26 |    TABLE ACCESS BY GLOBAL INDEX ROWID| IV                     |     40M|      1 |   1027 |13:54:31.57 |      15M|     12M|      0 |       |       |          |         |
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      25 - access("ITEM_3"="IV"."payeeid" AND "ITEM_2"="IV"."COMPANYPK")
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      26 - filter(("IV"."pk" IS NULL AND "IV"."INUM" LIKE '147%' AND INTERNAL_FUNCTION("IV"."INORG") AND
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    |*  4 |     INDEX RANGE SCAN                 | id1                    |      1 |     15M|    938K|00:02:01.25 |     208K|    205K|       |       |          |
    |   5 |    VIEW PUSHED PREDICATE             | VW_SQ_1                |   1031 |      1 |   1031 |00:00:04.87 |    5748 |    881 |       |       |          |
    |   6 |     NESTED LOOPS                     |                        |   1031 |      1 |   1031 |00:00:04.86 |    5748 |    881 |       |       |          |
    |   7 |      NESTED LOOPS                    |                        |   1031 |      1 |   1031 |00:00:03.71 |    3918 |    583 |       |       |          |
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    |* 11 |        INDEX UNIQUE SCAN             | CP_p1                  |   1031 |      1 |   1031 |00:00:00.01 |       9 |      0 |       |       |          |
    |* 12 |      INDEX RANGE SCAN                | IDX_SPLLLIST           |   1031 |      1 |   1031 |00:00:01.15 |    1830 |    298 |       |       |          |
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    Elapsed: 00:00:01.58
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