To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) a) It documents the rules and descriptions associated with every given component - This option is incorrect. The function of a SOA Registry is not to document the rules and descriptions associated with every given component. Instead, it focuses on storing and managing information (metadata) about the components.
Option B) b) It contains information (metadata) about all the components that the SOA supports - This option is correct. One of the main functions of a SOA Registry is to store and manage information (metadata) about all the components that the Service-Oriented Architecture (SOA) supports.
Option C) c) It completes the job of getting the message from the sending component to the receiving component - This option is incorrect. The function of a SOA Registry is not to complete the job of message exchange between components. It primarily focuses on storing and managing metadata about the components.
Option D) d) a&b - This option is incorrect. Although option B is correct, option A is incorrect. Therefore, the correct answer is not option D.
The correct answer is Option B. The SOA Registry contains information (metadata) about all the components that the SOA supports.