10+ DeHaat Interview Questions and Answers

Async await is a syntactic sugar for working with asynchronous code in a synchronous manner, while Task is a class that represents an asynchronous operation.

• Async await allows you to write asynchronous code that looks like synchronous code, making it easier to read and maintain.

• Tasks are objects that represent asynchronous operations and can be used to manage and monitor the progress of those operations.

• Async await is built on top of the Task class and is used to simplify the...read more

Thread concepts involve concurrent execution of multiple parts of a program.

• Threads allow for parallelism and can improve performance.

• Threads can communicate with each other through shared memory or message passing.

• Thread synchronization is important to prevent race conditions and deadlocks.

• Examples of thread concepts include multithreading, thread pools, and futures.

• Thread safety is important to ensure correct behavior in concurrent programs.

I have designed architecture diagrams for various projects including a cloud-based e-commerce platform and a mobile app for a healthcare provider.

• Designed architecture diagrams for a cloud-based e-commerce platform using AWS services such as EC2, S3, and RDS

• Created architecture diagrams for a mobile app for a healthcare provider using Firebase for backend services

• Collaborated with development teams to ensure architecture diagrams aligned with project requirements

I would prioritize the features based on their impact and feasibility.

• Assess the importance and urgency of the feature

• Collaborate with the engineering team to understand their capacity and constraints

• Identify any potential trade-offs or compromises that can be made

• Consider alternative solutions or workarounds

• Communicate with stakeholders about the situation and manage expectations

• Re-prioritize the roadmap if necessary

To minimize conflicts in annual performance reviews, establish clear expectations, provide regular feedback, encourage open communication, and offer support for professional development.

• Establish clear performance expectations and goals at the beginning of the review period.

• Provide regular feedback throughout the year, both positive and constructive.

• Encourage open communication between the project lead and team members, creating a safe space for discussions.

• Offer support for ...read more

Unit test cases are written to test individual units or components of a software application.

• Identify the unit to be tested

• Write test cases to cover different scenarios such as positive, negative, and edge cases

• Use testing frameworks like JUnit or NUnit to write and execute the test cases

• Ensure the test cases are independent, isolated, and repeatable

• Include assertions to verify the expected behavior of the unit

Developed projects in b.tech related to web development and machine learning.

• Developed a web application for online shopping using PHP and MySQL.

• Implemented a machine learning model for predicting stock prices using Python.

• Created a sentiment analysis tool using Natural Language Processing.

• Designed a chatbot using Dialogflow for customer service.

• Developed a website for a local NGO using WordPress.

• Implemented a recommendation system for a movie streaming platform using collabo...read more

List is an ordered collection of items, while Dictionary is a collection of key-value pairs.

• List maintains the order of elements, while Dictionary does not guarantee any specific order.

• In List, elements are accessed by their index, while in Dictionary, elements are accessed by their keys.

• Example: List - [1, 2, 3], Dictionary - {'a': 1, 'b': 2, 'c': 3}

ALB is application layer load balancer, NLB is network layer load balancer in AWS.

• ALB operates at Layer 7 and supports HTTP, HTTPS, and WebSocket protocols.

• NLB operates at Layer 4 and supports TCP, UDP, and TLS protocols.

• ALB can route traffic based on content of the request, NLB routes based on IP address and port.

• ALB is ideal for web applications, NLB is ideal for applications that require high performance and low latency.

• ALB supports host-based routing, NLB does not.

Session handling in Dot Net Core involves configuring session middleware and using session variables to store user-specific data.

• Configure session middleware in Startup.cs using services.AddSession() and app.UseSession()

• Access session variables using HttpContext.Session

• Store and retrieve data in session variables using key-value pairs

• Set session expiration and cookie options for security and performance

• Example: services.AddSession(options => { options.IdleTimeout = TimeSpan.F...read more

Hibernate many to many mapping allows for a relationship where multiple instances of one entity are related to multiple instances of another entity.

• Use @ManyToMany annotation in Hibernate to establish many to many relationship between entities

• Create a join table to store the relationship between the two entities

• Specify the mapping details such as cascade type, fetch type, and join column details

Handling various project challenges requires adaptability and problem-solving skills.

• Identifying bottlenecks in the development process

• Implementing automation to streamline workflows

• Resolving conflicts between different teams

• Managing unexpected changes in project scope

Expectations on total compensation for the DevOps engineer role.

• Research industry standards for DevOps engineer salaries

• Consider the cost of living in the area where the job is located

• Factor in additional benefits such as healthcare, retirement plans, and bonuses

• Negotiate based on your skills, experience, and the value you bring to the company