MasterCard Senior Software Engineer Interview Questions, Process, and Tips

SSL certificates are digital certificates that authenticate the identity of a website and encrypt information sent to the server.

• SSL certificates ensure secure communication between a user's browser and a website's server.

• They use encryption to protect sensitive data such as login credentials, credit card information, etc.

• SSL certificates are issued by Certificate Authorities (CAs) and contain information about the web...read more

Securing REST API involves using authentication, authorization, encryption, and input validation.

• Use authentication methods like OAuth, JWT, or API keys to verify the identity of clients.

• Implement authorization to control access to resources based on user roles and permissions.

• Encrypt data transmission using HTTPS to protect sensitive information from being intercepted.

• Validate and sanitize input data to prevent inject

I would investigate the root cause, work on fixing the issue, and implement measures to prevent it from happening again.

• Investigate the root cause of the downtime, such as network issues, server failures, or software bugs

• Work on fixing the issue promptly to minimize impact on users and business operations

• Implement measures to prevent similar downtime in the future, such as redundancy, monitoring, and failover mechanism

Implement a throttling system to handle dropped messages from a slow downstream service.

• Implement a queue to store messages from the downstream service.

• Set a maximum queue size and drop messages when the queue is full.

• Use a timestamp to track when messages were received and process them in order.

• Implement a retry mechanism to reprocess dropped messages after a certain time.

• Monitor the queue size and processing speed to

Design a calendar system for scheduling events and managing time.

• Include features like creating events, setting reminders, and viewing schedules.

• Allow users to set recurring events and customize event details.

• Implement a user-friendly interface for easy navigation and interaction.

• Integrate with other applications for seamless data sharing.

• Consider scalability and performance for handling large amounts of data.