标签：padding resume ref yourself argument prepare each box ber
This phone screen will consist of a non-technical series of questions about you and the company, and then a second half of a simple technical question to be coded out
Answer the following questions (2-5 minute responses) technical answers not required, more interested in hearing about your reasoning
There aren‘t really any "correct" answers here, just make sure you‘re prepared to answer the following questions about the company you‘re interviewing with. Be honest, friendly and ready to defend any statements you make with logical arguments to back them up. Note, you should ALWAYS have follow-up questions.
Answer the following question in the Markdown cell below. It‘s important to note that the cell below does NOT have syntax highlighting, its common in a phone screen interview to be given a text editor hich doesn‘t have anything more than basic text support
There‘s many ways to answer this question, you might be required to solve it multiple ways and discuss some pros and cons of each way. Listed below are various solutions
## Example 1: Using looping technique def fib(n): a,b = 1,1 for i in range(n-1): a,b = b,a+b return a print fib(7) # Using recursion def fibR(n): if n==1 or n==2: return 1 return fib(n-1)+fib(n-2) print fibR(7) ## Example 3: Using generators a,b = 0,1 def fibI(): global a,b while True: a,b = b, a+b yield a f=fibI() f.next() f.next() f.next() f.next() f.next() f.next() print f.next() ## Example 4: Using memoization def memoize(fn, arg): memo = {} if arg not in memo: memo[arg] = fn(arg) return memo[arg] ## fib() as written in example 1. fibm = memoize(fib,7) print fibm ## Example 5: Using memoization as decorator class Memoize: def __init__(self, fn): self.fn = fn self.memo = {} def __call__(self, arg): if arg not in self.memo: self.memo[arg] = self.fn(arg) return self.memo[arg] @Memoize def fib(n): a,b = 1,1 for i in range(n-1): a,b = b,a+b return a print fib(7)
Below is a table depicting averaged relative performance time in seconds over 10 runs to caluclate the 15000th fibonacci number.
| Fib(n=15000) | ||||
| loops | recursion | generators | memoization | memoization as decorator |
| 45 | 87 | 58 | 44 | 43 |
| 47 | 88 | 58 | 42 | 42 |
| 51 | 92 | 60 | 44 | 43 |
| 43 | 87 | 58 | 42 | 43 |
| 48 | 92 | 61 | 42 | 44 |
| 45 | 87 | 59 | 43 | 44 |
| 44 | 85 | 57 | 42 | 44 |
| 44 | 87 | 62 | 43 | 43 |
| 48 | 86 | 59 | 42 | 43 |
| 45 | 91 | 61 | 45 | 45 |
| 46 | 88.2 | 59.3 | 42.9 | 43.4 (Avg) |
标签：padding resume ref yourself argument prepare each box ber
原文地址：http://www.cnblogs.com/prmlab/p/6961038.html
