Chryselys Interview Questions and Answers

The number of cars that can pass in an hour at a 4-way signal depends on various factors such as traffic flow, signal timing, and road capacity.

• The capacity of a 4-way signal intersection depends on the traffic flow from each direction

• Signal timing and coordination can affect the number of cars that can pass through the intersection

• Road capacity and lane configuration also play a role in determining the throughput of t...read more

Developed a data pipeline to process and analyze real-time streaming data for a retail analytics platform.

• Designed a scalable ETL pipeline using Apache Kafka and Spark Streaming to handle high-velocity data.

• Implemented data transformation processes to clean and enrich raw data from various sources.

• Utilized AWS services like S3 for storage and Redshift for data warehousing to facilitate analytics.

• Collaborated with data ...read more

SQL tests assess your ability to write queries and manipulate data effectively.

• Understand basic SQL commands: SELECT, INSERT, UPDATE, DELETE.

• Practice JOIN operations: INNER JOIN, LEFT JOIN, RIGHT JOIN.

• Learn about aggregate functions: COUNT(), SUM(), AVG().

• Familiarize yourself with GROUP BY and HAVING clauses.

• Explore subqueries and their use cases.