Hard Job Interview Questions That'll Make You Think, 'WTF?'

'How do you explain a vending machine to someone who hasn't seen or used one before?'
PHOTO: Chris Clinton

If you're lucky, like yours truly, every interview you've ever had has been a breeze. I mean, yes, there's anxiety before the actual interview, but in retrospect, I've never been stumped by a particular question. Even just five minutes on the Internet can teach you what the standard questions are and what you should expect.

Others haven't faired as well. Glassdoor, a job search and recruitment site, reveals just how brutal job interviews are by releasing some of the most unexpected, mind-boggling questions interviewees have ever been asked. The report is based on data collected from Glassdoor's users:

1. "How do you explain a vending machine to someone who hasn't seen or used one before?"—Global Data Analyst, Bloomberg L.P.

2. "How many fire hydrants are there in Los Angeles County?"—Software Engineer, Disney Interactive Studios

3. "If your current employer had an anniversary party for you, what five words would be written on the cake to describe you?"—District Manager, Express

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4. "Who in history would you want to go to dinner with and why?"—Flight Attendant, PSA Airlines

5. "Prove that hoop stress is twice the longitudinal stress in a cylindrical pressure vessel."—Test Operations Engineer, SpaceX

6. "What's the capital of Canada?"—Team Leader, OpticsPlanet

7. "Name a brand that represents you as a person."—Brand Strategist, Twitter

8. "Estimate how many employees [are] in the next building."—Data Scientist, Risk Management Solutions

9. "How many happy birthday posts do you think Facebook gets in one day?"—Sales Operations, Facebook

10. "If you could take anyone on a road trip with you, who would you take and why?"—Educatorlululemon

11. "What is the first thing you'd print with a 3D printer if you had one?"—Linux Systems Administrator I, Rackspace

12. "If you had to take only one item to a deserted island, what would that be?"—Customer Service Specialist, Squarespace

13. "Please describe an instance where you had to make a decision without all of the necessary information."—Analyticsathenahealth

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14. "How do you reverse a text string on the Unix command line?"—Developer, Capital One

15. "If you are in a boat with a boulder and you drop that boulder into the lake, how does the water level before and after you drop the boulder in the lake compare?"—Mechanical Design Engineer, Apple

16. "You have been asked to lead a multi-million dollar, multi-year grant that will be supported across several companies and universities. How do you start?"—Research Scientist, Ford Motor Company

17. "Sell me on one idea, and then sell me on the opposite of that idea."—Solarwinds Administrator, Blizzard Entertainment

18. "How would you go about to find the top five Java Developers in a certain area."—Technical Recruiter, Google

19. "What is the probability of an integer from 1 to 60,000 not having the digit 6?"—Quantitative Developer, AKUNA CAPITAL

20. "If you were a Muppet, which character would you be?"—Donor Family Advocate, LifeNet Health

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21. "Give me 48 cents using six coins. Tell me [the] quantity and value of the six coins."—Human Resource Manager, Wintec

22. "Write an equation to optimize the marketing spend between Facebook and Twitter campaigns."—Analyst (Data Science), Uber

23. "What is the angle at 3:15?"—Implementation Consultant, Fast Enterprises

24. "What part of the newspaper do you read first? What does this say about you?"—Audit, BDO USA

25. "If a coworker had an annoying habit, and it hindered your quality of work, how would you resolve it?"—Production Technician, Procter & Gamble

26. "Throw your resume aside and tell me what makes you, you." —Sales Executive, Zillow

27. "How would you find the square root of 1.2?" —Hardware Engineer, Jump Trading

Not gonna lie... Some of these are hard AF. I feel like my only option would be to fake a heart attack.

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