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Delta Air Lines
On a demandé à Revenue Management Co-op...26 avril 2015

How many basketballs would fit in this room?

44 réponses

Since the position is for a revenue management position, the interviewer will want to see that you can think through the math in a practical way. Don't guess. Instead, think aloud as you work out the answer. Here's a simple way to get a rough estimate of the number of basketballs that will fit in the room. Estimate the size of the room. Let's say it is about 10' x 10', with an 8' ceiling. Now, estimate the volume required for one basketball. To get a rough answer, don't get fancy with equations and dealing with the shape of the basketball. You may not be sure of the diameter of a basketball, but you have a rough idea. To make the math simple, figure that the ball is about 1' in diameter. The ball is the same width in all directions, so it takes up roughly 1 cubic foot of volume. How many cubic feet in the room? 10 time 10 time 8, or 800. So, there's room for approximately 800 basketballs. If I were interviewing a candidate for this type of position, I'd be very pleased if the candidate could think through that answer. But if this were a position for a role that involved more sophisticated math, such as a data analyst or engineering position, I would expect the candidate to go further and discuss how the estimate could be improved. The next step would be accounting for the exact dimensions of the room and basketballs. And an engineer should be aware of dense packing arrangements that could fit more basketballs into the room. Moins

That depends. Inflated or deflated ?

How many need to fit?

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Susquehanna International Group (SIG)

On the phone was asked two simple probability questions. What is the probability of being dealt a pair of cards? What is the probability of rolling the same side of a dice three times in a row.

6 réponses

The reason it is 1/36 is because it does not specify which side it must be. Therefore the first roll does not really count. Once you take the first roll it will decide what you need to roll the next two times. Therefore the math is 1*(1/6)*(1/6)= 1/36. If they asked what is the probability of rolling a 6 three times in a row then it would be 1/216. Moins

Was asked the card question also. For a pair of cards to be dealt from a 52card deck is 3/51. So first card drawn doesnt matter so you have 3 cards out of the 51 cards left that will match the first hence 3/51 as the probability Moins

1/17 and 1/36

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Siemens Gamesa

If you were a baker and I was to ask you to bake me a cake what would you do?

5 réponses

I give

Surely I give

Ask lots of questions, ensure you are meet all deliverables.

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DTE Energy

Explain a time you missed a key piece of information during work or on a project and what you did to overcome it. Explain a time you went above and beyond with a group Explain a project you worked on where you had to do some deep research to get your answers.

5 réponses

Its been 4 days since verbal offer, she said she needs supervisors signature for the written offer. Should I worried? Moins

It could be that you are starting some time in January and they are just processing offers for those starting sooner. I would just follow up with your recruiter next week. Moins

Yeah, you are right, I do start in January. Thank you. Lol

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Imperial Oil

Have you ever lead a team ?

5 réponses

Yes. I have led teams of Engineers and Technicians in the recent past.

Yes, I have led teams of Engineers and Technicians in the recent past

Yes, I have led a team of Engineers and Technicians in the recent past

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J.D. Irving

What do you know about this job.

5 réponses

They would likely do it after the 2nd interview. It is all done on site.

Was the drug test after you accepted the offer? or was it before? I have already accepted offer had background/reference check, have not heard about drug test yet. Moins

Hey, i have my Skype interview tomorrow, if they choose to pursue me further, when would they administer the drug test? Moins

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Susquehanna International Group (SIG)

Write a function that is passed a string and determines whether or not the string is a palindrome. (They had me write on the whiteboard in front of them.)

4 réponses

I used for-loops and character arrays and got the question right.

I think the double index way is pretty neat. for(int i=0,j=n-1;i

I think the double index way is pretty neat. for(int i=0,j=n-1;i

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Group One Trading

Given two die, what is the probability that the sum when rolled would add up to six?

4 réponses


5/36 is right.... Combinations that add up to six: 1 and 5, 2 and 4, 3 and 3, 4 and 2, 5 and 1. So we have 5 successes. There are 36 individual outcomes because there are 6 sides on each die and 6*6 = 36 So we have 5/36. Moins


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I steve h like to cause division here at loftness mfg in hector

3 réponses

rather not go to your low side of management skills! come here to get along with others and work as you do none of the above. Moins

so true about steve h the operations director inside knowledge now the elitist is looking for help on company website stay back as he will try and set people up as company thieves if he doesn't like the person. Moins

Yes this is one place to stay awayfrom years ago in the eighties they liked to get rid of people who used health insurance and would go out of their way to get people hurt nothing good here. Moins

Group One Trading

100 pennies in a jar. 1 penny has 'heads' on both sides. You pick a penny out of the jar and give it to your friend (without looking at the penny). Your friend flips the penny in the air and gets 7 heads in a row. Which penny do you have? Why?

3 réponses

Chance of 1 Heads = .5 Chance of 7 heads in a row = (.5)^7 to do this in your head think of fractions... (1/2)^7 = (1/2*1/2=1/4, * 1/2=1/8, * 1/2 = 1/16....if you do it seven times you get 1/128. so you have a better chance to pick out the penny with two heads (1/100) than to get 7 heads in a row (1/128) Moins

99 times out of 100 you take the normal penny. prob that normal penny give 7 heads in a row is 1/128. so, prob that he has special penny is 1/100 / (1/100 + 0.99*1/128) = 56.2% Moins

~56.4% that you have the 2-headed penny.

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