REUTERSMarat Gurt.Tech engineers are some of the smartest people in the world.But even they have a hard time answering the brain teaser questions a lot of tech companies like to ask during job interviews.Every QA Tester noticed that QA Interview questions become more arduous and toilsome in the last few years.Who would imagine that QA Engineer should know how to.Amazon Technical Program Manager interview questions and 124 interview reviews.Free interview details posted anonymously by Amazon interview candidates.MS Paint, the first app you used for editing images, will probably be killed off in future updates of Windows 10, replaced by the new app Paint 3D.Microsoft lists.Amazon Interview Questions For Software Development Engineer Job' title='Amazon Interview Questions For Software Development Engineer Job' />We went through Glassdoor to find some of the trickiest brain teaser questions they get asked, and the best way to answer them.Systems engineer at Google How many trailing zeros are in the number 5 Suggested answers 51.So there is 1 trailing zero.This sounds like one geared not so much towards getting the right answer, but getting to it the right way.If you think a bit and say one, the interviewer will know you did it the brute force way, doing the math.Youd get at the answer faster, and probably impress them more, if you think instead how many times a ten will be produced in doing that math, rather than what the actual result of the math will be.Software engineer at Facebook You have two lightbulbs at a 1.You want to find the floor at which the bulbs will break when dropped.Find the floor using the least number of drops.Suggested answers Start moving up in increments of 1.Once the bulb breaks, move down to the floor before it broke on and start moving up floors in increments of one until the second bulb breaks.Amazon Interview Questions For Software Development Engineer Job' title='Amazon Interview Questions For Software Development Engineer Job' />This results in a worst case scenario of 1.If it doesnt break, then try floor 3.And on and on 4.If you reach 9.Manager at Amazon If you had 5,6.Suggested answers The interviewer is not looking for the right answer because there can be many.What heshe is looking for is your logical approach in solving the answer.So you could start by probing more is first I would like to understand if 5,6.Then ask the next logical question based on the answer.Assuming it is a single elimination tournament.All teams lose one game except the champs.Its always of teams 1.Software Development Engineer in Test at Webtrends There are 2.What is the minimum number of socks you should grab to ensure you have a matching pairSuggested answer Im not a mathematician, statistician, or highly analytical but if you pick up 3 socks they could still be all the same type even if the odds are 5.Odds do not equal reality.So the only way to ensure you have a matching pair is to pick up 1.This is the only fool proof guaranteed way to get a pair in the real world and not the world of odds.Web Technology Intern at Riot Games Imagine that you have three boxes, one containing two black marbles, one containing two white marbles, and the third, one black marble and one white marble.The boxes were labeled for their contents BB, WW, BW but someone has switched the labels so that every box is now incorrectly labeled.You are allowed to take one marble at a time out of any box, without looking inside, and by this process of sampling you are to determine the contents of all three boxes.What is the smallest number of drawings needed to do thisSuggested answer The key thing here is that the box does not contain what it says on the label.As such you can guarantee the contents of each box with one draw.Heres how Draw a marble from the box labeled BW since it is labeled BW it must be either BB or WW If you draw a white for example you know 1.WW box.Then there are only two boxes left labeled WW and BB in this example and the only two things that they can be are BB or BW.The box labeled BB cannot be BB and so hence must be the BW.This leaves the box labeled WW to be BB by elimination.Same thing works if you pick a black marble first.The key is picking from the BW box in the start and confirming what it actually is.One draw is the smallest number needed.Software Engineer at Cisco If you have a square room with no roof, and you had four flagpoles you had to plant on the walls so that each flagpole touched two walls, how would you do itSuggested answer The answer was that by planting them on the corners, each one is touching two walls because each corner is part of two walls.I wanted to pierce two walls with a pole horizontally too.They said it was an innovative solution.Software engineer at D.E.Shaw Co. Given 9 balls all of which weigh the same except for one, what is the minimum of weighings necessary to find the ball weighs more or lessSuggested answer You could do this with two weighings assuming its a two pan balance 1 place three balls on each side if they balance out then its the remaining three that has abnormal ball 2 out of that group, place one ball on each side if balances it out, the abnormal ball is the remaining one.If the weighing in step 1 does not balance out, grab the group of three balls that is light or heavy and repeat step 2 described above.ASIC Verification engineer at Zoran You have 2 pieces of rope, each of which burns from one end to the other in 3.If different pieces touch, the flame will transfer from one to the other.You cannot assume any rope properties that were not stated.Given only 1 match, can you time 4.Suggested answers Take one rope Rope A, place it down as a circle.Light match and start burning rope A at the tips that are touching.When the rope completely burns out, 1.Hold the second rope Rope B straight and place one end so that it will immediately catch fire when the two burning points from Rope A finally touch and are just about to burn out.Thus 1.Rope A 3.Rope B gives you 4.Make a T.Simple.Software engineer at Raytheon In front of you are three light switches.Only one does anything, and it turns on the light downstairs.From here you cant see the light, and it makes no sound.You must determine which switch operates the light, BUT you can only go check it once.How do you figure out which switch is for the lightSuggested answer Flip any switch you want.Wait for about 5 1.Flip that same switch off, and another one on.Go check the light.If its off and hot, it was the first switch, if its on it was the second and if its cold and off, it was the last one.QA Interview Questions.Tricky Test manager interview question may sound like Imagine being a test manager and trying to evaluate the performance of your QA testers.As we all know staff performance reviews is a one of the responsibilities of QA Managers.Software quality assurance engineers do a wide variety of tasks, such as bug hunting, bug reporting, test planning, and test tool development.To fully evaluate the work of the QA tester, Test Manager would evaluate the quality of work on each of the tasks. 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