Skip to main content

partitioning (operatimg system ).

 WHAT IS PARTITIONING ?


Certain operating system use partitioned memory management to allow multiprogramming .

• Partitioning means dividing main memory into various sections.

 • These section are called as partitions.

 • There are two types of partitions:

1) fixed partition .    2) variable partition.


  Fixed partition  .

 • In this method partitions are fixed at the time of system generation . At this time , system manager has to declear partition time.

 • Fixed partition are also called static partition . On declearing fixed partition , the operating system create partition description table.

 • It reduces the uses the CPU utiliisation .

 • It reduces the degree of multiprogramming. .


   variable partition .

    In variable partition number of partition and their size are variable 

• They are not defined at the time of system generation .

 • These partition are created by operating systems at run time they differ in size. 

• The procedure to be followed for memory allocation is nearly same as that in case of fixed partition .

Labels:

Comments

Post a Comment

Popular posts from this blog

Free notes of Biomolecules short revision part 1

Biomolecules Polysaccharide are not sweet in taste.               All monosaccharides are reducing sugar.         Monosaccharides are starting from carbon number 3.                                                                Starch contain amylose and amylopectin amylose contain bonding between c1 -c4 and amylopectin has c1-c6 bonding in their structure.                                                                 Monomers: a)Lactose : 1) beta -D galactose 2)beta - D glucose.                                   ...
6 comments
Read more

Free notes of surface tension

  Surface tension.         Intermolecular forces:- The forces of attraction and repulsion between their molecules . These forces ,are called intermolecular . Their is to forces 1) cohesive force.  2) adhesive force. Cohesive force:- the force of attraction between 2 molecules of same substance called as cohesion. Adhesive force:- the force of attraction and repulsion between the two different substance like liquid and solid ,solid with gas etc. is called adhesion. Range of molecular forces:- The maximum distance between 2 molecules upto which intermolecular forces are effective (also called as short range forces). Distance (10 to the power -9). Sphere of influence :- an imaginary sphere drawn with given molecule as centre and radius equal to the molecular range . Surface film :- The layer of surface of liquid whose thickness is about equal to range of molecular attraction. Surface energy :- when a molecular is taken from the inside to the surface layer work...
2 comments
Read more

Free notes of Biomolecules short revision part 2

  Biomolecules part 2. DNA has bases like adenine , gunine , cytosine , thymine.                                                  RNA has bases like adenine, gunine , cytosine , urasil.                                                        Adenine have hydrogen bond with thymine and cytosine have hydrogen bond with gunine.                                                                       D- fructose , D - manose ,D- glucose , form a same osazone product .                        ...
4 comments
Read more