Category: Code Ecology

SQL Questions and Answers

May 7, 2020

1. What are stored procedures in SQL, and why use them? 2. How do SQL functions differ from stored procedures? 3. What are the different types of joins in SQL? 4. Explain the purpose of a UNION statement in SQL. 5. How does the GROUP BY clause work in SQL? 6. Describe the HAVING clause…
The Operating System Machine Level: Bridging Hardware and User Programs

March 7, 2020

In the hierarchy of modern computing, the Operating System Machine (OSM) level stands as a critical bridge. It sits above the instruction set architecture (ISA) and below user applications, delivering essential services like memory management, file I/O, and process control. To the average programmer, it appears as a new, enhanced instruction set—but beneath the surface,…

SQL Questions and Answers