Question

The free-space list can be implemented using a bit vector approach. Which of the following is a drawback of this technique? This technique is not feasible for small disks. The technique is more complicated than most other techniques. To traverse the list, each block must be read on the disk It is not feasible to keep the entire list in main memory for large disks.

Answer 1

Option D: It is not feasible to keep the entire list in main memory for large disks.

Step-by-step explanation:

An operating system keeps a track on its memory and provide the record pf memory which is not used. Free-space blocks are recorded in a list showing that these blocks are not allocated to any file or directory.

Free-space list is implemented in many ways and Bit vector approach is one of them. In this approach, a series or collection of bits is used to display each block. Total of 2 bits are used which are 0 and 1.

• 0 denotes that the memory block is allocated.
• 1 denotes that the memory block is free.