| Can you just give us some example of an | | | | that there is 10 kilometers of road per inhabitant and so |
| unexpected question? Something maybe most | | | | on and so forth. So the key thing here is as you go |
| candidates wouldn't be prepared for. | | | | through the top down approach, make sure every |
| Let me give you 2 examples. 2 different examples. | | | | single step in your reasoning is A: Logical and B: you |
| Go ahead. | | | | say it out loud. So that the interviewer can… |
| One example is you being asked to calculate how | | | | Can follow up with you? |
| many lampposts are in the United States. Unless you | | | | Can follow with you and can ensure that your |
| have any specific background in reading in the subject | | | | approach is logical and sensible. The second example |
| matter, you will not know the answer. | | | | is for example, you being asked what is the square |
| Yeah. | | | | root of 77 just out of the top of your head. You |
| There are ways to answer those questions and most | | | | obviously don't have access to calculator, most likely |
| likely the interviewer asking the question wouldn't know | | | | you will not be allowed to take pen and paper either. |
| the answer either. How do you go about answering | | | | Once again there the key is not to get caught in panic |
| that question? How do you go about answering that | | | | and just start rambling things. you know for example, |
| question? Well, you know you can take either a top | | | | they compose the square root of 77, as you know 8 |
| down approach or a bottom up approach. A top down | | | | times V for example, I'm really thinking loud here, you |
| approach would be perhaps starting by saying that | | | | can come up with like quite a few different things, you |
| there are 300 million inhabitants in the US. Then you | | | | could approximate it by square root of 81 you know is |
| know roughly that say maybe 60 % of the roads | | | | 9 and so on and so forth, so that gives an upper |
| have public lighting. Therefore, you can assume say | | | | bound, that you can come with a lower bound, etc, etc. |