Data Science Interview Challenge

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Data Science Interview Challenge

Data Science Interview Challenge

1. Python

Introduction Challenge 1: List Comprehension Challenge 2: String Manipulation Challenge 3: Dictionary Manipulation Challenge 4: Nested Loops Challenge 5: Classes Theoretical Questions

2. NumPy

Challenge 1: Array Creation Challenge 2: Array Manipulation Challenge 3: Statistical Insights Challenge 4: Handling Missing Values Challenge 5: Subarray Sorting Theoretical Questions

3. Pandas

Challenge 1: DataFrame Creation Challenge 2: Data Grouping Challenge 3: Indexing and MultiIndexing Challenge 4: Altering DataFrame Challenge 5: Iterating Over Data Theoretical Questions

4. Matplotlib

Challenge 1: Fundamentals of Plotting Challenge 2: Other Graph Types Challenge 3: Subplots Challenge 4: Customizing Plots Challenge 5: Adding Text to Plots Theoretical Questions

5. Seaborn

Challenge 1: Visualizing Distributions Challenge 2: Exploring Categorical Data Challenge 3: Relational Plots Challenge 4: Regression Plots Challenge 5: Matrix Plots Theoretical Questions

6. Statistics

Challenge 1: Probabilities and Distributions Challenge 2: Bayes' Theorem Challenge 3: Hypothesis Testing Challenge 4: Confidence Intervals Challenge 5: Correlation Theoretical Questions

7. Scikit-learn

Challenge 1: Data Scaling Challenge 2: Basic Model Creation Challenge 3: Pipelines Challenge 4: Cross-validation Challenge 5: Hyperparameter Tuning Theoretical Questions

Theoretical Questions

1. What is the output of the following code?

2. In which of the following scenarios would you use the `pass` statement?

3. What is the output of the following code?

4. Which function is used to read input from the user in Python 3?

5. How can you get the length of the list `a`?

6. What will the code display?

7. Which of the following is NOT a valid variable name in Python?

8. Which of the following will raise an exception?

9. What will the following code return?

10. Which of the following methods will NOT alter the original list but will return a new sorted list?

What is the output of the following code?

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<class 'tuple'>

<class 'list'>

<class 'dict'>

NoneType

In which of the following scenarios would you use the pass statement?

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When you want to exit a loop.

When you want an empty block that does nothing.

When you want to pass a function as a parameter.

When you want to pass a value to a function.

What is the output of the following code?

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[3, 4, 5, 6, 7]

[3, 5, 7]

[3, 5, 7, 9]

[5, 7]

Which function is used to read input from the user in Python 3?

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get()

inputString()

input()

read()

How can you get the length of the list a?

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len.list(a)

a.len()

len(a)

length(a)

What will the code display?

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False

True

None

TypeError

Which of the following is NOT a valid variable name in Python?

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_my_var

my_var2

VAR

2my_var

Which of the following will raise an exception?

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print("Python"[10:])

''.join(['P', 'y', 't', 'h', 'o', 'n'])

print("2" + "3")

print(int("2.0") + int("3"))

What will the following code return?

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15

21

12

18

Which of the following methods will NOT alter the original list but will return a new sorted list?

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list.sort()

sorted(list)

list.sorted()

sort(list)

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 7

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