# Data Science MCQ Questions And Answers

## 21. The applications of Data Science are

1. Airline Route Planning
2. Healthcare
3. Fraud and Risk Detection
4. All of the above

Explanation: The applications of Data Science are: Airline Route Planning, Healthcare, Fraud and Risk Detection.

## 22. A correct way to preprocess the data When performing regression or classification is

1. Normalize the data → PCA → training
2. PCA → normalize PCA output → training
3. Normalize the data → PCA → normalize PCA output → training
4. None of the above

Explanation: A correct way to preprocess the data When performing regression or classification is “Normalize the data → PCA → training”.

## 23. Which of the following uses data on some object to predict values for other object ?

1. Inferential
2. Predictive
3. Exploratory
4. None of the above

Explanation: A prediction is a forecast, but not only about the weather. Predictive uses data on some object to predict values for other object.

## 24. Point out the correct statement.

1. Data has only qualitative value
2. Data has both qualitative and quantitative value
3. Data has only quantitative value
4. None of the above

Explanation: Data belongs to the set of items and it has only qualitative value.

## 25. Which of the following is the common goal of statistical modeling?

1. Inference
2. Subsetting
3. Summarizing
4. None of the above

Explanation: Inference is the act or process of deriving logical conclusions from premises known or assumed to be true and it is the common goal of statistical modeling. So, option A is correct.

Neural Networks MCQ Questions And Answers

## 26. Which of the following is a branch of statistics?

1. Descriptive statistics
2. Industry statistics
3. Inferential statistics
4. Both A and C

Explanation: Both A and C is the correct answer.

## 27. ________ is the basic data structure of pandas that can be thought of SQL table or a spreadsheet data representation.

1. Series
2. List
3. Dataframe
4. ndarray

Explanation: Dataframe is the basic data structure of pandas that can be thought of SQL table or a spreadsheet data representation.

## 28. Advantages of Data Science are

1. Data Science is Versatile
2. Abundance of Positions
3. A Highly Paid Career
4. All of the above

Explanation: All of the above is the correct answer.

## 29. Which of the following is another name for raw data?

1. Destination data
2. Eggy data
3. Machine learning
4. Secondary data