Affinity Education Software Developer Interview Questions and Answers

Q1. Basic Java questions
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Q2. Spring, Spring boot basics
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Q1. Microservices Communications
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Q2. Project level experiences
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Q1. Where did you use Service Bus in your application?
Ans. 
I used Service Bus to implement asynchronous communication between microservices in my application.
• Implemented message queuing for decoupling services

• Used Service Bus to handle communication between different components

• Leveraged Service Bus for reliable message delivery
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Q2. SOLID Principles and OOPS
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Q3. How is Authorization implemented at your organization?
Ans. 
Authorization at our organization is implemented using role-based access control (RBAC) and OAuth.
• Role-based access control (RBAC) is used to assign permissions to roles, which are then assigned to users based on their job responsibilities.

• OAuth is used for authentication and authorization, allowing users to access resources based on their permissions and roles.

• Access control lists (ACLs) are also used to define specif
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Q4. Why prefer Entity Framework Core over Entity Framework?
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Entity Framework Core is preferred for its improved performance, cross-platform support, and new features.
• Entity Framework Core is faster and more lightweight compared to Entity Framework.

• Entity Framework Core supports cross-platform development, allowing for easier deployment on different operating systems.

• Entity Framework Core introduces new features like Global Query Filters, Owned Entities, and Value Conversions fo
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Medium level question are asked

Q1. Given a array and asked sum
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Q1. Palindrome code
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Q2. Delete all the distinct records
Ans. 
To delete all distinct records, use a query to identify and remove duplicate entries.
• Identify distinct records using a query

• Delete duplicate entries from the database
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Q1. How is GIL and how python handle multi threading
Ans. 
GIL stands for Global Interpreter Lock in Python, which limits execution of multiple threads at once.
• GIL is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecodes at once.

• Due to GIL, Python threads are not suitable for CPU-bound tasks but are still useful for I/O-bound tasks.

• To handle multi-threading in Python, one can use multiprocessing module or asynchronous progr...read more
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Q2. Explain How React works under the hood.
Ans. 
React uses a virtual DOM to efficiently update the actual DOM based on changes in state or props.
• React creates a virtual DOM representation of the actual DOM.

• When state or props change, React compares the virtual DOM with the actual DOM to determine the minimal set of changes needed.

• React then updates the actual DOM efficiently to reflect the changes.
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Q1. Tell me about About yourself
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Q2. Describe your projects
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Q3. How you implement machine learning algorithms in cars
Ans. 
Machine learning algorithms in cars are implemented through sensors, data collection, training models, and real-time decision-making.
• Collecting data from various sensors installed in the car, such as cameras, lidar, radar, and GPS.

• Training machine learning models using the collected data to recognize patterns and make predictions.

• Implementing real-time decision-making algorithms in the car's onboard computer to assist ...read more
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Q1. Read java oops and basiscs of spring well, and if you had done thesis there can be questions on that
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Q2. Lambda expressions
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Q3. Stream filtering
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Q1. Why are you looking for job change
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Hexaware was came to our college placement and our placement staff gave us 3 days coding training and aptitude training and the first round round is aptitude it was a online mcq type you have to pass the aptitude inorder to attend the round 2

Coding test was based on DSA