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Top 15 Famous Microsoft Interview Puzzles


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Microsoft Corporation incorporated on September 22, 1993, is engaged in developing, licensing and supporting a range of software products and services. The Company also designs and sells hardware, and delivers online advertising to the customers. The Company operates in five segments: Devices and Consumer (“D&C”) Licensing, D&C Hardware, D&C Other, Commercial Licensing, and Commercial Other. The Company’s products include operating systems for computing devices, servers, phones, and other intelligent devices; server applications for distributed computing environments; productivity applications; business solution applications; desktop and server management tools; software development tools; video games; and online advertising. It also offers cloud-based solutions that provide customers with software, services, and content over the Internet by way of shared computing resources located in centralized data centers. It also designs and sells hardware, including PCs, tablets, gaming and entertainment consoles, phones, other intelligent devices, and related accessories. Cloud revenue is earned primarily from usage fees and advertising. Its cloud-based computing services include Bing, Microsoft Azure, Microsoft Dynamics CRM Online, Microsoft Office 365, OneDrive, Skype, Xbox Live, and Yammer. In addition to selling individual products and services, the Company offers suites of products and services. It provides consulting and product and solution support services, and trains and certifies computer system integrators and developers. The Company does business worldwide and has offices in more than 100 countries.

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List of 15 famous puzzles which have been asked in Microsoft Interviews –

 1. Cheater husband puzzle

A certain town comprises of 100 married couples. Everyone in the town lives by the following rule: If a husband cheats on his wife, the husband is executed as soon as his wife finds out about him. All the women in the town only gossip about the husbands of other women…….. READ COMPLETE WITH SOLUTION

 

2. Which switch controls the bulb??

Outside a room there are three light switches. One of switch is connected to a light bulb inside the room.
Each of the three switches can be either ‘ON’ or ‘OFF’. You are allowed to set each switch the way you want it……. READ COMPLETE WITH SOLUTION

 

3. Knight, knave, commoner

A king has a daughter and wants to choose the man she will marry.  There are three suitors from whom to choose, a Knight, a Knave, and a Commoner.  The king wants to avoid choosing the Commoner as the bridegroom……. READ COMPLETE WITH SOLUTION

 

4. The hidden card

In this problem, you and a partner are to come up with a scheme for communicating the value of a hidden card.  The game is played as follows…….. READ COMPLETE WITH SOLUTION

 

5. Table with four coins

A square table has a coin at each corner.  Design an execution sequence, each of whose steps consists of one of the following operations……. READ COMPLETE WITH SOLUTION

 

6. The Puzzle of 100 Hats

100 persons are standing in line, each facing the same way.  Each person is wearing a hat, either red or blue, but the hat color is not known to the person wearing the hat.  In fact, a person knows the hat color only of those persons standing ahead of him in line…….. READ COMPLETE WITH SOLUTION

 

7. hat colors Microsoft Puzzle

A team of three people decide on a strategy for playing the following game.  Each player walks into a room.  On the way in, a fair coin is tossed for each player, deciding that player’s hat color, either red or blue.  Each player can see the hat colors of the other two players, but cannot see her own hat color……. READ COMPLETE WITH SOLUTION

 

8. The prisoners and the switch (100 Prisoners in Solitary Cells)

A certain town comprises of 100 married couples. Everyone in the town lives by the following rule: If a husband cheats on his wife, the husband is executed as soon as his wife finds out about him. All the women in the town only gossip about the husbands of other women…….. READ COMPLETE WITH SOLUTION

 

9. Burning ropes to measure time

You are given a box of matches and a piece of rope.  The rope burns at the rate of one rope per hour, but it may not burn uniformly.  For example, if you light the rope at one end, it will take exactly 60 minutes before the entire rope has burnt up, but it may be that the first 1/10 of the rope takes 50 minutes……. READ COMPLETE WITH SOLUTION

 

10. Age of children

A (presumed smart) insurance agent knocks on a door and a (presumed smart) woman opens.  He introduces himself and asks if she has any children.  She answers: 3.  When he then asks their ages (which for this problem we abstract to integers), she hesitates……. READ COMPLETE WITH SOLUTION

 

11. Lie tribe and Truth tribe

There are two tribes in Mars, Lie tribe and Truth Tribe. Lie tribe always speaks lie, True tribe always speaks truth.You meet three mars people and ask From First Person: What tribe you belong to?, he replies something in his language which you don’t understand……… READ COMPLETE WITH SOLUTION

 

12. Walking on Globe Puzzle

If you walk one mile south, then one mile east and then one mile north, you reach the place where you started. In such a scenario, how many points are there on the globe to make it happen?……. READ COMPLETE WITH SOLUTION

 

13. Flipping Coins Puzzle

There are twenty coins sitting on the table, ten are currently heads and tens are currently tails. You are sitting at the table with a blindfold and gloves on. You are able to feel where the coins are, but are unable to see or feel if they heads or tails. You must create two sets of coins…….. READ COMPLETE WITH SOLUTION

 

14. SHEIKH’S INHERITANCE PUZZLE

An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is slower wins. After wandering aimlessly for days, the brothers ask a wise man for guidance. Upon receiving the advice, they jump on the camels and race to the city as fast as they can…….. READ COMPLETE WITH SOLUTION

 

15. THE WEDDING ANNIVERSARY PUZZLE

Recently I attended the twelfth wedding anniversary celebrations of my good friends Mohini and Jayant. Beaming with pride Jayant looked at his wife and com-mented, ‘At the time we were married Mohini was 3/4 of my age, but now she is only 5/6 th.. ……. READ COMPLETE WITH SOLUTION

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4 Comments on this article

  • Vinod 22nd August 2015
    Great Puzzle List, Awesome!!

  • dougbell 24th October 2015
    Microsoft was founded on April 4, 1975, was incorporated on June 25, 1981, and went public on March 13, 1986. I was wondering where you got the date September 22, 1993 so I googled it. Apparent Reuters has the date wrong in their database (weird). At any rate, your date (and Reuters) is incorrect.

  • Vishnu 15th December 2015
    If N is even than N/2 iteration Else (N+3)/2

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