Python Pandas Quiz

What is the output of print(2 ** 3)?

• 6

• 8

• 9

• 5

Answer explanation

The expression 2 ** 3 means 2 raised to the power of 3. This equals 2 * 2 * 2, which is 8. Therefore, the correct output of print(2 ** 3) is 8.

Arjun is trying to create a list of his favorite numbers for a math project. Which of the following is a correct way for him to create that list?

• list = (1, 2, 3)

• list = [1, 2, 3]

• list = {1, 2, 3}

• list = <1, 2, 3>

Answer explanation

The correct way to create a list in Python is using square brackets, as in 'list = [1, 2, 3]'. The other options use parentheses (tuple), curly braces (set), or invalid syntax.

Abigail is working on a data analysis project and needs to read a CSV file containing sales data. Which method should she use to read the CSV file using pandas?

• pd.read_file()

• pd.read_csv()

• pd.read_excel()

• pd.read_txt()

Answer explanation

The correct method to read a CSV file in pandas is pd.read_csv(). This function specifically handles CSV file formats, while the other options are for different file types.

What does dropna() do in pandas?

• Removes duplicates

• Removes missing values

• Adds new columns

• Sorts data

Answer explanation

The dropna() function in pandas is used to remove missing values from a DataFrame or Series. This helps in cleaning the data by eliminating rows or columns that contain NaN (Not a Number) values, making it essential for data analysis.

Mason is working on a data analysis project and needs to use the pandas library. How does he import pandas with alias pd?

• import pandas as pd

• include pandas as pd

• pandas as pd

• load pandas -> pd

Answer explanation

The correct way to import pandas with an alias is 'import pandas as pd'. This allows you to use 'pd' as a shorthand for 'pandas' in your code, making it more concise and readable.

What is the result of len("Python")?

• 5

• 6

• 7

• Error

Answer explanation

The function len() returns the number of characters in a string. The string "Python" has 6 characters, so len("Python") results in 6.

Rohan is organizing his collection of items. He has different types of containers for his collection. Which of the following types of containers can he change the items inside of?

• Tuple

• String

• List

• Integer

Answer explanation

In Python, a List is mutable, meaning its elements can be changed after creation. In contrast, Tuples, Strings, and Integers are immutable, meaning they cannot be altered once defined.

During a data analysis project, Liam wants to understand the summary statistics of his dataset. Which pandas function should he use?

• describe()

• summary()

• info()

• stats()

Answer explanation

The correct function for obtaining summary statistics in pandas is 'describe()'. It provides a quick overview of the central tendency, dispersion, and shape of a dataset's distribution, while the other options do not serve this purpose.

Michael is analyzing a dataset using pandas in Python. He uses the command df.head(3). What does this command return?

• Last 3 rows

• First 3 rows

• First 3 columns

• Rows where head == 3

Answer explanation

The method df.head(3) returns the first 3 rows of the DataFrame. It is commonly used to quickly view the top entries of a dataset, making 'First 3 rows' the correct answer.

Abigail is working on a project where she needs to analyze survey results. The process of transforming the raw survey data into a clean dataset is called?

• Data Hacking

• Data Scripting

• Data Cleaning

• Data Storage

Answer explanation

The correct choice is 'Data Cleaning', which refers to the process of transforming raw data into a clean dataset by removing errors, inconsistencies, and irrelevant information, ensuring the data is accurate and usable.