> For the complete documentation index, see [llms.txt](https://alvintoh.gitbook.io/machine-learning-a-z-hands-on-python-r-in-data-sci/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://alvintoh.gitbook.io/machine-learning-a-z-hands-on-python-r-in-data-sci/section-2-part-1-data-preprocessing/quiz-1-data-preprocessing.md).

# Quiz 1: Data Preprocessing

## QUIZ 1

### Question 1

* In Python, which of the following library can best help manage datasets ?
* Answer: pandas

### Question 2

* What is the correct way of importing a dataset in R ?
* Answer: dataset = read.csv('Data.csv')

### Question 3

* Which of the following is not a recommended strategy to take care of missing data ?
* Answer: Delete the observation that contains the missing data

### Question 4

* Do we need to apply OneHotEncoder to encode an independent variable that gives the size S, M or L of a t-shirt ?
* Answer: No

### Question 5

* What is the worst choice of split ratio Training set : Test set ?
* Answer: 50 : 50