Cognizant Technical Lead Interview Questions, Process, and Tips

Handling a complex integration scenario involving multiple systems and dependencies

• Identify all systems involved and their dependencies

• Design a robust architecture to handle data flow between systems

• Implement error handling and fallback mechanisms

• Perform thorough testing to ensure all scenarios are covered

The project architecture refers to the overall structure and design of the software system.

• The project architecture defines how different components of the system interact with each other.

• It includes the high-level design decisions, such as the choice of programming languages, frameworks, and technologies.

• The architecture also outlines the communication protocols, data flow, and security measures.

• Examples of project ar...read more

Upgrade WAS version involves planning, testing, and executing the upgrade process.

• Create a backup of the existing environment

• Review the system requirements for the new version

• Plan the upgrade process including downtime and rollback strategy

• Test the upgrade in a non-production environment

• Execute the upgrade following vendor documentation

• Verify the upgrade and test the application functionality

The event loop is a programming construct that handles and dispatches events in a non-blocking manner.

• The event loop is responsible for handling and dispatching events in an application.

• It allows for non-blocking I/O operations by efficiently managing multiple events.

• The reactor pattern is a design pattern that uses an event loop to handle and dispatch events.

• The event loop has several phases: event registration, event...read more