The operating system manages memory allocation. The operating system divides the 
memory into several fixed-sized partitions and each partition may contain exactly one process. 

When a partition is free, a process is selected from the input queue and is loaded 
into the free partition. When the process terminates, the partition becomes available 
for another process.

Operating system uses a table indicating which parts of memory are available and 
which are occupied.

Finally when a process arrives and needs memory, a memory section large enough 
for this process is provided. When it is time to load or swap a process into main 
memory, and if there is more than one free block of memory of sufficient size, 
then the operating system must decide which free block to allocate. 

First-Fit chooses the first available block that is large enough. 

	Memory Management Scheme - First Fit
Enter the number of blocks:3
Enter the number of files:2

Enter the size of the blocks:
Block 1:5
Block 2:2
Block 3:7
Enter the size of the files :
File 1:1
File 2:4

File No:	File size :	Block No:	Block size:	 Fragment
1		1		1		5		4
2		4		3		7		3