EY Global Delivery Services ( EY GDS) Software Engineer Interview Questions, Process, and Tips for Experienced

An abstract class is a blueprint for other classes, allowing for shared methods and properties while preventing instantiation.

• An abstract class cannot be instantiated directly.

• It can contain abstract methods (without implementation) that must be implemented by derived classes.

• It can also have concrete methods (with implementation) that can be used by derived classes.

• Example: In a shape hierarchy, 'Shape' can be an abst...read more

Static methods belong to the class, while class methods can modify class state and take the class as the first argument.

• Static methods are defined using the 'static' keyword and do not take 'self' or 'cls' as the first parameter.

• Class methods are defined using the '@classmethod' decorator and take 'cls' as the first parameter, allowing access to class variables.

• Static methods cannot modify class state or instance state...read more

MRO (Method Resolution Order) in Python determines the order in which base classes are searched when executing a method.

• MRO is crucial in multiple inheritance scenarios to avoid ambiguity.

• Python uses the C3 linearization algorithm to compute MRO.

• You can view the MRO of a class using the __mro__ attribute or the mro() method.

• Example: For class D inheriting from B and C, and both B and C inheriting from A, MRO is D ->...read more

The merge function in pandas combines DataFrames based on common columns or indices.

• Used to combine two DataFrames based on a key column.

• Example: pd.merge(df1, df2, on='key') merges df1 and df2 on the 'key' column.

• Supports different types of joins: inner, outer, left, right.

• Example: pd.merge(df1, df2, how='outer') performs an outer join.

• Can merge on multiple columns using a list: pd.merge(df1, df2, on=['key1', 'key2'])

Guidewire is a software company that provides core system software for property and casualty insurers.

• Guidewire offers software solutions for policy administration, claims management, and billing.

• Their software helps insurance companies streamline their operations and improve customer service.

• Examples of Guidewire products include PolicyCenter, ClaimCenter, and BillingCenter.