7 Eleven Senior Developer Interview Questions, Process, and Tips

Design a system for sequential transactions with rollback on failure

• Use a transaction manager to coordinate the two transactions

• Implement a try-catch mechanism to handle failures and trigger rollback if needed

• Ensure that both transactions are part of the same unit of work

Kafka is a distributed streaming platform, Partition is a way to divide data, ConsumerGroup is a group of consumers sharing the load.

• Kafka is a distributed streaming platform used for building real-time data pipelines and streaming applications.

• Partition is a way to divide data within a Kafka topic to allow for parallel processing and scalability.

• ConsumerGroup is a group of consumers that work together to consume data ...read more

Exception handling is a programming concept that deals with errors during program execution.

• Exception handling allows for graceful handling of errors in a program.

• It involves try, catch, and finally blocks to handle exceptions.

• Examples include catching divide by zero errors or file not found exceptions.

To handle hashmap memory leak, ensure proper management of keys and values, use weak references, and periodically check for unused entries.

• Avoid storing unnecessary data in the hashmap

• Use weak references for keys or values if appropriate

• Periodically check for and remove unused entries to free up memory