Infotech Python Developer Interview Questions, Process, and Tips

Two to three rounds are there 1. Coding
2. L1
3. L2

Test from normal question

Q1. Tell me about yourself
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Q2. Project architecture
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Q3. Sns vs SQS architecture
Ans. 
SNS is a pub/sub messaging service while SQS is a message queue service in AWS architecture.
• SNS allows for push notifications to multiple subscribers, while SQS is used for decoupling services and handling asynchronous tasks.

• SNS is used for real-time messaging and event-driven architecture, while SQS is used for reliable message processing and scaling.

• SNS supports multiple message delivery protocols like HTTP, HTTPS, E...read more
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Q4. S3 file parking and triggers
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Q5. Explain Eventbridge
Ans. 
Eventbridge is a serverless event bus service provided by AWS for connecting applications using events.
• Eventbridge allows different AWS services, SaaS applications, and custom applications to communicate with each other through events.

• It simplifies the process of building event-driven architectures by decoupling producers and consumers of events.

• Eventbridge can be used to trigger automated workflows, connect different ...read more
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Q1. Coding and debugging questions
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Q2. Aptitude questions based on the technical part
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Q1. Checking our reading writing listening speaking skills
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Q1. Asked questions about oops
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Q1. Basic python questions
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Q2. SQL join query and update query
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Q1. Salary expectations
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Q2. Other basic questions
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Q1. Valid Sudoku leetcode problem
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Q2. Generate Parentheses leetcode problem
Ans. 
Generate all valid combinations of parentheses for given n pairs
• Use backtracking to generate all valid combinations of parentheses

• Keep track of the number of open and close parentheses used

• Add open parenthesis if there are remaining open parentheses, add close parenthesis if there are more open than close parentheses
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Q1. How you will scale your existing in use database? What are the types of scaling? How flask handles multiple requests?
Ans. 
Scaling a database involves horizontal or vertical scaling, with types including sharding, replication, and partitioning. Flask handles multiple requests using a WSGI server like Gunicorn.
• Types of scaling include horizontal scaling (adding more servers), vertical scaling (upgrading server resources), sharding (splitting data across multiple servers), replication (copying data to multiple servers), and partitioning (div...read more
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Q1. What is difference between tuple and list and where did you used it in your project?
Ans. 
Tuple is immutable and ordered, while list is mutable and ordered. Tuples are used for fixed data, lists for dynamic data.
• Tuple is created using parentheses (), while list is created using square brackets []

• Tuples are immutable, meaning their elements cannot be changed once defined, while lists are mutable and can be modified

• Tuples are typically used for fixed data that will not change, while lists are used for dynamic...read more
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Q2. What is difference Between monothic and microservices
Ans. 
Monolithic architecture is a single unified unit while microservices architecture is composed of small, independent services.
• Monolithic architecture is a single, indivisible unit where all components are tightly coupled.

• Microservices architecture breaks down the application into smaller, independent services that communicate with each other through APIs.

• Monolithic applications are easier to develop and deploy but can b...read more
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Q3. Write a code to find second largest number without using built functions and write one test case for that function
Ans. 
Code to find second largest number in an array without using built-in functions
• Iterate through the array to find the largest number

• Keep track of the largest number and update it if a larger number is found

• Once the largest number is found, iterate again to find the second largest number
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Q4. What are mixins in django?
Ans. 
Mixins in Django are a way to reuse code across multiple classes by providing methods and attributes that can be inherited.
• Mixins are classes that provide methods and attributes to be inherited by other classes.

• They are used to add common functionality to multiple classes without repeating code.

• Mixins are not meant to be instantiated on their own, but rather to be inherited by other classes.

• An example of a mixin in Dja...read more
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Q5. What is difference between django and flask?
Ans. 
Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. Flask is a lightweight WSGI web application framework.
• Django is a full-featured framework with built-in ORM, admin panel, and authentication system, while Flask is more lightweight and flexible.

• Django follows the 'batteries included' philosophy, providing many built-in features out of the box, whereas Flask is mor...read more
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Q6. What are different kind of testing frameworks in django?
Ans. 
Different testing frameworks in Django include Django's built-in test framework, pytest, and unittest.
• Django's built-in test framework: Provides tools for testing Django applications and is easy to use.

• pytest: A popular testing framework that offers more features and flexibility compared to Django's built-in test framework.

• unittest: A standard Python testing framework that can also be used for testing Django applicatio
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Q7. What are different AWS services used in your project?
Ans. 
We use AWS services like EC2, S3, RDS, Lambda, and CloudWatch in our project.
• EC2 - for hosting our application servers

• S3 - for storing and serving static assets

• RDS - for managing our relational database

• Lambda - for serverless computing

• CloudWatch - for monitoring and logging
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Q8. What is decorator in python?
Ans. 
Decorator in Python is a design pattern that allows adding new functionality to an existing object without modifying its structure.
• Decorators are functions that modify the behavior of other functions or methods.

• They are denoted by @decorator_name above the function definition.

• Decorators can be used for logging, timing, authentication, etc.

• Example: @staticmethod, @classmethod, @property
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Q9. Write a simple django code to render hello world template
Ans. 
Django code to render hello world template
• Create a new Django project

• Create a new Django app within the project

• Create a template file with 'hello world' content

• Update views.py to render the template

• Update urls.py to map a URL to the view
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