Solix Technologies Technical Lead Interview Questions and Answers

Implemented the Observer design pattern.

• Used to maintain consistency between related objects

• Allows for one-to-many relationships between objects

• Used in event-driven systems

• Example: Used to update UI when data changes in backend

I have implemented a microservices architecture for scalability and flexibility.

• Implemented microservices architecture using Docker and Kubernetes

• Used API Gateway for routing and load balancing

• Implemented service discovery using Consul

• Implemented circuit breaker pattern using Hystrix

• Implemented centralized logging using ELK stack

• Implemented distributed tracing using Zipkin

• Implemented event-driven architecture using Kaf...read more

I improved stored procedure performance by optimizing queries and indexes.

• Identified and removed unnecessary joins and subqueries

• Used appropriate indexing to speed up query execution

• Reduced the number of round trips to the database by using batch processing

• Rewrote complex queries to simpler ones

• Used stored procedure parameters instead of variables to avoid recompilation

• Used SET NOCOUNT ON to reduce network traffic

• Used

Implementing naming of threads in a multi-threaded OS and implementing rand5 using rand7

• Use thread ID or thread name to name threads in a multi-threaded OS

• Implement a function that generates a random number between 1 and 7

• Use rejection sampling to implement rand5 using rand7

• Ensure thread names are unique to avoid confusion

• Test the implementation thoroughly to ensure correctness

Free uses metadata stored in the heap to determine the number of memory blocks to delete for arrays.

• Free stores metadata about the size of the allocated memory block in the heap.

• Free uses this metadata to determine the number of memory blocks to delete for arrays.

• For example, if an array of 10 integers was allocated, the metadata would indicate the size of the block as 40 bytes.

• Free would then use this information to d...read more

OOPs concepts are used in real life to model objects and their behavior.

• Encapsulation: A car's engine is encapsulated and can only be accessed through specific methods.

• Inheritance: A sports car is a type of car that inherits properties and methods from the car class.

• Polymorphism: A person can be a student, teacher, or employee, each with their own unique behavior.

• Abstraction: A TV remote has buttons that abstract the c...read more

Hashmap is a data structure that stores key-value pairs and uses hashing to locate values based on their keys.

• Hashmap uses an array of linked lists to store key-value pairs.

• The hash function is used to convert the key into an index of the array.

• If two keys have the same hash value, they are stored in the same linked list.

• Hashmap provides constant time complexity for insertion, deletion, and retrieval of values.

• Java's H...read more