Intrics Team Lead Interview Questions and Answers

Various join algorithms used in SQL Server include Nested Loop Join, Merge Join, and Hash Join.

• Nested Loop Join: Used when joining small tables or when there is an index on the join columns.

• Merge Join: Used when joining two sorted datasets, typically faster than Nested Loop Join.

• Hash Join: Used when joining large datasets, involves hashing the join columns for efficient matching.

• Example: SELECT * FROM Table1 INNER JOIN

Data warehousing is the process of collecting, storing, and managing data from various sources for analysis and reporting.

• Data warehousing involves extracting data from multiple sources

• Data is then transformed and loaded into a central repository

• The data can be queried and analyzed for business intelligence purposes

• Examples of data warehousing tools include Oracle Exadata, IBM Netezza, and Microsoft SQL Server

A livelock is a situation where two or more processes continuously change their states in response to each other without making any progress.

• Occurs when two or more processes are each waiting for the other to release a resource, preventing any progress

• Similar to a deadlock, but the processes are not blocked - they are simply unable to make progress

• Common in distributed systems where processes communicate over a network