Salesforce Senior Member Technical Interview Questions and Answers

Design a parking lot with efficient layout and features

• Consider the size and layout of the parking lot

• Include designated spots for different types of vehicles (compact, regular, handicapped)

• Implement a clear signage system for easy navigation

• Incorporate security measures such as lighting and surveillance cameras

• Include payment options for parking fees (e.g. ticket machines, mobile app)

• Consider environmental factors lik

Traversal in matrix is the process of visiting each element in a matrix in a specific order.

• Traversal can be done in different orders such as row-wise, column-wise, spiral, etc.

• For example, in a 3x3 matrix, row-wise traversal would be [1, 2, 3, 4, 5, 6, 7, 8, 9].

• Spiral traversal in the same matrix would be [1, 2, 3, 6, 9, 8, 7, 4, 5].

Red bus high level design

• Design a system for booking and managing bus tickets

• Include features like searching for buses, selecting seats, and making payments

• Consider scalability, availability, and security in the design

• Use a distributed architecture with load balancing and fault tolerance

• Implement a database for storing bus schedules, seat availability, and user information

Monolith has simplicity but lacks scalability, while microservices offer flexibility but introduce complexity.

• Monolith: Simplicity in development and deployment, easier to debug and test

• Monolith: Lack of scalability, all components tightly coupled

• Microservices: Flexibility to use different technologies for different services

• Microservices: Scalability, each service can be independently scaled

• Microservices: Increased com...read more

Lock and Synchronised are both mechanisms used for thread synchronization in Java.

• Lock is a more flexible and powerful mechanism compared to synchronized keyword in Java.

• Lock interface provides more functionalities like tryLock(), lockInterruptibly(), etc.

• Lock allows for more fine-grained control over locking and unlocking of resources.

• Synchronized keyword is simpler to use but may lead to deadlocks in complex scenario...read more