Learn Basic C++ with Free Lessons & Tips

I ask the below questions:

1) Declare a structure with int, float and char variables. (This will lead to structure padding in C, then full details of structure padding like... what is it? why it is required?)

2) Pointers... what is the best use of pointers? Why pointers required? What happens when a pointer is allocated memory and when it got freed?

3) Memory layout of a program... Heap, Stack.

4) What happens when a function is called?

5) What happens when a C program is compiled? Phases like preprocessing, compilation. And about few compiler flags like -g, -O3, -E.

There is no language and database in software industries that you can call as most important. It keeps changing. It's entirely depend upon your requirment. Each languages has its uniqueness and hence important in its domain.

Check below point for further clarification:

Java for Application software developers

C/C++ for System software (Utilities/Device drivers/Embedded Systems) developers.

Python for AI, ML, DL and Data Science application developers.

JS for front-end developers.