73 lines
1.6 KiB
Markdown
73 lines
1.6 KiB
Markdown
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# IBM Data Scientist Interview
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There are several types of questions they might ask.
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This is a[ good website](https://www.interviewquery.com/dashboard/home) to check out to try to prep for the interview.
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---
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### String Mapping
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algorithms
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Easy
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[Answer now](https://www.interviewquery.com/questions/string-mapping)
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Given two strings, `string1` and `string2`, write a function `str_map` to determine if there exists a one-to-one correspondence (bijection) between the characters of `string1` and `string2`.
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For the two strings, our correspondence must be between characters in the same position/index.
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**Example 1:**
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**Input:**
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```python
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string1 = 'qwe'
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string2 = 'asd'
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string_map(string1, string2) == True
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# q = a, w = s, and e = d
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```
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**Example 2:**
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**Input:**
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```python
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string1 = 'donut'
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string2 = 'fatty'
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string_map(string1, string2) == False
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# cannot map two distinct characters to two equal characters
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```
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**Example 3:**
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**Input:**
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```python
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string1 = 'enemy'
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string2 = 'enemy'
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string_map(string1, string2) == True
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# there exists a one-to-one correspondence between equivalent strings
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```
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**Example 4:**
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**Input:**
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```python
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string1 = 'enemy'
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string2 = 'ymene'
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string_map(string1, string2) == False
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# since our correspondence must be between characters of the same index, this case returns 'False' as we must map e = y AND e = e
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```
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### Total Transactions
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- a good [SQL Hackerrank article ](https://towardsdatascience.com/9-tips-that-helped-me-clear-all-hackerrank-sql-challenges-in-2-weeks-479eb0084862) via Medium
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How would you deal with outliers when training a model?
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