Accenture Lead Data Engineer Interview Questions and Answers

Group data by column 'A', calculate mean of column 'B' and sum values in column 'C' for each group.

• Use groupby() function in pandas to group data by column 'A'

• Apply mean() function on column 'B' and sum() function on column 'C' for each group

• Example: df.groupby('A').agg({'B':'mean', 'C':'sum'})

deepcopy() creates a new object with completely independent copies of nested objects, while copy() creates a shallow copy.

• deepcopy() creates a new object and recursively copies all nested objects, while copy() creates a shallow copy of the top-level object only.

• Use deepcopy() when you need to create a deep copy of an object with nested structures, to avoid any references to the original object.

• Use copy() when you only ...read more

Python decorators are functions that modify the behavior of other functions. They are commonly used for adding functionality to existing functions without modifying their code.

• Decorators are defined using the @ symbol followed by the decorator function name.

• They can be used to measure the execution time of a function by wrapping the function with a timer decorator.

• Example: def timer(func): def wrapper(*args, **kwargs...read more