Questions

Another name for false productivity is Spinning your wheels. They use the term for false productivity because your wheels are spinning as you're doing work but you're not going anywhere i.e, making any progress.

There is no difference except for the fact that the first one gives a hint that the function fun() is probably in another source file.

Logical address space is generated from CPU; it bound to a separate physical address space is central to proper memory management. Physical address space is seen by the memory unit. Logical address space is virtual address space. Both these address space will be same at compile time but differ at execution time.

The difference between Union and Union all is that Union all will not eliminate duplicate rows, instead it just pulls all rows from all tables fitting your query specifics and combines them into a table. A UNION statement effectively does a SELECT DISTINCT on the results set.

Noida city of India has recently been chosen by the UN for the Global Continuing City-2025 Program.

If an object moves with some velocity that means the magnitude and direction of the object changes i.e, the object moves with some acceleration. Hence, if the object moves with constant velocity, no change in direction and magnitude of speed i.e, no acceleration = 0 acceleration.