PwC Python Software Developer Interview Questions and Answers

Program to calculate factorial

• Use a loop to multiply the numbers from 1 to n

• Handle edge cases like 0 and negative numbers

• Use recursion for a more elegant solution

Synchronous means happening at the same time, while asynchronous means not happening at the same time.

• Synchronous operations occur in real-time, while asynchronous operations can be delayed or queued.

• Synchronous operations block the program until they are completed, while asynchronous operations allow the program to continue running.

• Examples of synchronous operations include function calls and loops, while examples of ...read more

CTE and temp table usage in SQL

• Use CTE for recursive queries and complex subqueries

• Use temp tables for large data sets and complex queries

• CTE is more efficient for small data sets

• Temp tables can be indexed for faster performance

• Consider the scope and lifespan of the data when choosing between CTE and temp table

Dependency injection is a design pattern that allows objects to receive dependencies rather than creating them.

• It helps to decouple the code and makes it more testable and maintainable.

• It allows for easier swapping of dependencies without changing the code.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.

• Example: Instead of creating a database connection ob...read more

Bean factory is used for creating and managing instances of beans in Spring framework.

• Bean factory is responsible for creating and managing instances of beans defined in the Spring configuration file.

• It provides a way to decouple the configuration and specification of dependencies from the actual application code.

• Bean factory supports different scopes of beans such as singleton, prototype, request, session, etc.

• It also...read more