Innominds Software Senior Engineer Interview Questions and Answers

Types of memory in JVM include heap memory, stack memory, and non-heap memory.

• Heap memory is where objects are stored and is divided into Young Generation, Old Generation, and Permanent Generation.

• Stack memory is used for storing local variables and method call information.

• Non-heap memory includes Metaspace (replacing Permanent Generation) and Code Cache.

• Examples: Young Generation, Old Generation, Metaspace

Threads are lightweight processes within a program that can run concurrently, allowing for parallel execution of tasks.

• Threads are independent sequences of execution within a program.

• Concurrency refers to multiple threads running simultaneously.

• Threads share the same memory space, allowing for communication and synchronization.

• Example: A web server handling multiple client requests concurrently using threads.

Fault tolerance can be achieved by implementing redundancy, monitoring systems for failures, and implementing failover mechanisms.

• Implement redundancy in critical systems to ensure that if one component fails, another can take over.

• Regularly monitor systems for failures and implement automated alerts for immediate response.

• Implement failover mechanisms such as load balancing and clustering to ensure continuous operatio...read more