Future Solutions Technical Lead Interview Questions and Answers

Normalization in SQL is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Normalization is used to eliminate data redundancy by breaking up tables into smaller, related tables.

• It helps in reducing data anomalies such as update anomalies, insert anomalies, and delete anomalies.

• There are different levels of normalization - 1NF, 2NF, 3NF, BCNF, and 4NF, each with specific rules t...read more

Use two variables to keep track of the largest and second largest elements in the array.

• Iterate through the array and update the variables accordingly.

• Handle edge cases like duplicates and empty arrays.

• Time complexity is O(n) as we only iterate through the array once.

Use SQL query to join bridge table with users and permissions tables to get one to many mapping

• Join the bridge table with users table using user_id

• Join the bridge table with permissions table using permission_id

• Group by user_id and count the number of permissions for each user

Use external storage like hard drive or cloud storage to store integers exceeding RAM capacity.

• Store the integers in an external storage device such as a hard drive or cloud storage.

• Implement a paging system to swap data between RAM and external storage as needed.

• Use specialized data structures like B-trees or hash tables to efficiently access the stored integers.

Entity framework is preferred for rapid development, code-first approach, and ORM capabilities.

• Entity Framework is preferred for rapid development as it eliminates the need to write SQL queries manually.

• Entity Framework supports code-first approach, allowing developers to define the model first and generate the database schema from it.

• Entity Framework provides Object-Relational Mapping (ORM) capabilities, making it eas...read more