- its means Information Hiding.
- What data and methods are accessible to other objects?
- What data and methods are inaccessible from other objects?
- Deriving new class from an existing .
- Facility of reusability of the existing software.
- An object can perform multiple functions.
- Empty classes for future use.
Database Query Languages:
- Can be procedural or non-procedural.
- These languages are used to fetch data from database.
- Most common Database Query Language is Structured Query Language (SQL).
- Translate source code into object code as whole.
- Saves Compiled file called Object file.
- Computer will run object file.
- compiler tells about error at time of compilation.
- All errors must be removed for successful compilation.
- Example C / C++ Language use Compiler.