8043

What makes data science particularly useful in social network analysis for detecting fake accounts and misinformation?

• It tracks every user’s physical location and personal data

• It identifies behavioral anomalies and network structures using graph analytics and machine learning

• It manually verifies all social media accounts for authenticity

• It prevents the creation of new social media accounts entirely

_______ is a large repository of raw and unstructured data collected.

• Data Warehouse

• Network Data

• Data Lake

• Data Mart

What will be the output of the following code?

• Returns only the second row

• Returns two rows with index 2

• Throws a KeyError

• Returns only the last occurrence of index 2

What is the difference between np.array([1,2,3]) and np.array([[1,2,3]])?

• No difference, both are the same

• The first is a 1D array, and the second is a 2D arrary

• The second array has more elements
  

• The first array uses less memory

In Pandas Series, what is the default index if none is specified?

• Random numbers

• Zero-based integer index

• Alphabetical index

• None

In which scenario would you use pandas.DataFrame.join()?

• To merge data frames using an index or column from both
  

• To split a column in a data frame into multiple columns
  

• To remove duplicates in a data frame
  

• To filter data based on conditions

What happens when using df.iloc[-1] on a DataFrame with an integer index that does not start at 0?

• Returns the last row
  

• Throws an IndexError
  

• Returns the row with the highest index value

• Returns the first row

What does the following code output?

• 1

• 99

• Error

• None

What parameter in rank() is used to handle duplicate values?

• method

• ascending

• na_position

• ignore_index

Which of the following best describes a "partial index"?

• Accessing data with all levels specified
  

• Accessing data with only one level specified
  

• Index with missing values

• An index used for NaN handling