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A disk is partioned into two hemispheres colored in black and white and the disk is rotating.By appropriate positioning of sensors (A sensor can read the disk near it as black or white) we need to find the direction of the motion of the disk.

Microsoft Interview Question | Submitted by anonymous on 2009-06-28 00:35:57

A disk is partioned into two hemispheres colored in black and white and the disk is rotating.By appropriate positioning of sensors (A sensor can read the disk near it as black or white) we need to find the direction of the motion of the disk.


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(default) 11 queries took 9 ms
NrQueryErrorAffectedNum. rowsTook (ms)
1DESCRIBE `questions`12121
2DESCRIBE `users`10101
3DESCRIBE `answers`991
4DESCRIBE `ratings`881
5DESCRIBE `companies`11111
6SELECT `Question`.`id`, `Question`.`interview_id`, `Question`.`question`, `Question`.`code`, `Question`.`created`, `Question`.`modified`, `Question`.`user_id`, `Question`.`company_id`, `Question`.`site_name`, `Question`.`url`, `Question`.`company_name`, `Question`.`category`, `User`.`id`, `User`.`username`, `User`.`password`, `User`.`email`, `User`.`firstname`, `User`.`lastname`, `User`.`created`, `User`.`modified`, `User`.`confirmed`, `User`.`confirm_code`, `Company`.`id`, `Company`.`linkedinid`, `Company`.`company_name`, `Company`.`industry`, `Company`.`type`, `Company`.`status`, `Company`.`company_size`, `Company`.`year_founded`, `Company`.`website`, `Company`.`description`, `Company`.`counter` FROM `questions` AS `Question` LEFT JOIN `users` AS `User` ON (`Question`.`user_id` = `User`.`id`) LEFT JOIN `companies` AS `Company` ON (`Question`.`company_id` = `Company`.`id`) WHERE `Question`.`id` = 12 LIMIT 1111
7SELECT `User`.`id`, `User`.`username`, `User`.`password`, `User`.`email`, `User`.`firstname`, `User`.`lastname`, `User`.`created`, `User`.`modified`, `User`.`confirmed`, `User`.`confirm_code` FROM `users` AS `User` WHERE `User`.`id` = 15 110
8SELECT `Question`.`id`, `Question`.`interview_id`, `Question`.`question`, `Question`.`code`, `Question`.`created`, `Question`.`modified`, `Question`.`user_id`, `Question`.`company_id`, `Question`.`site_name`, `Question`.`url`, `Question`.`company_name`, `Question`.`category` FROM `questions` AS `Question` WHERE `Question`.`user_id` = (15) 179617963
9SELECT `Answer`.`id`, `Answer`.`question_id`, `Answer`.`answer`, `Answer`.`code`, `Answer`.`sourceurl`, `Answer`.`created`, `Answer`.`modified`, `Answer`.`user_id`, `Answer`.`anonymous` FROM `answers` AS `Answer` WHERE `Answer`.`user_id` = (15) 000
10SELECT `Company`.`id`, `Company`.`linkedinid`, `Company`.`company_name`, `Company`.`industry`, `Company`.`type`, `Company`.`status`, `Company`.`company_size`, `Company`.`year_founded`, `Company`.`website`, `Company`.`description`, `Company`.`counter` FROM `companies` AS `Company` WHERE `Company`.`id` = 0 000
11SELECT `Answer`.`id`, `Answer`.`question_id`, `Answer`.`answer`, `Answer`.`code`, `Answer`.`sourceurl`, `Answer`.`created`, `Answer`.`modified`, `Answer`.`user_id`, `Answer`.`anonymous` FROM `answers` AS `Answer` WHERE `Answer`.`question_id` = (12) 000