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Fixed partitioning OS in Tamil or Fixed partitioning operating system in Tamil

Contiguous memory Allocation
Fixed partitioning is also known as contiguous memory allocation.
Memory management technique
Memory management technique have two types of partitions
1.Fixed partitioning
2.Variable or Dynamic partitioning
1.Fixed partitioning
Fixed partitioning is easiest method which is used to load more than one process into the main memory.
Fixed partitioning Sizes
Fixed partitioning have two types of sizes.
1.Equal Size partition
2. Unequal size partition
1.Equal Size partition
Equal size partition have each section as same.For example each section have 8 MB.
It is have Internal fragmentation and external Fragmentation of the process

2.Unequal size partition
Unequal size partition have each section have different size.For example sections have 2 MB 4 MB 6MB 8MB and 16 MB.
It is also have an internal fragmentation and external Fragmentation.

Placement Algorithm
The unequal size partition use two types of queues where processes are assigned to memory blocks.They are multiple queue and single queue.

Advantage of fixed partitioning
1.Easy to implement
2.Little overhead

Disadvantage of fixed partitioning

1.Internal fragmentation
2.External Fragmentation
3.Limitation on the size of the process
4.Degree of multiprogramming is less

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