Raspberri Pi is hardware can be used to interface with software to collect data and analysis. This is highly useful to develop IoT based applications.
Artificial intelligence follows human intelligence patterns. The same concepts embedded into machines to work like human. Best example is IBM Watson AI. Read more.
AI features in IBM watson are many. You can try these to your practice.
Index and Key both are different in RDBMS. Take a look all these differences quickly
Top differences between stored procedures and functions you can read and refresh quickly. Good summary for SQL developers.
Really useful UDF example you can use it for your DB2 project. Added interview questions.