Answer / Mohd Kasim Khan

1. Transaction State: In databases, a transaction can be in various states such as Active, Committed, or Aborted. These states indicate the status of a transaction within the database system.
2. Buffer Management: This is a technique used to manage data stored temporarily in main memory before being written to a secondary storage device like a hard disk. The goal is to minimize the number of disk accesses to improve performance.
3. Shadow Paging: Shadow paging, also known as Copy-on-Write (CoW) paging, is an optimization technique used in virtual memory systems. When a process modifies a page, instead of writing it immediately to disk, a 'shadow' or copy of the original page is created until the modified page is actually needed.

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