1. Define system software.
It consists of variety of programs that supports the operation of the computer. This software makes it possible for the user to focus on the other problems to be solved without needing to know how the machine works internally. Eg: operating system, assembler, loader.
2. Give some applications of operating system.
to make the computer easier to use
to manage the resources in computer
process management
data and memory management
to provide security to the user.
Operating system acts as an interface between the user and the system
Eg: windows, linux, unix, dos
3. Define compiler and interpreter.
Compiler is a set of program which converts the whole high level language program to machine language program. Interpreter is a set of programs which converts high level language program to machine language program line by line
4. Define loader.
Loader is a set of program that loads the machine language translated by the translator into the main memory and makes it ready for execution.
5. What is the need of MAR register?
MAR (memory address register) is used to store the address of the memory from which the data is to be read or to which the data is to be written.
