Question 54 YMM Library has which of the following sub library?

YMM (Universal Verification Methodology) Library is a comprehensive verification library that includes all four components: Standard Library (base classes and utilities), Register Abstraction Layer (RAL, for register modeling), Hardware Abstraction Layer (HAL, for hardware interaction), and Scoreboarding (for transaction tracking and verification). Options A, B, and C are incomplete subsets of the full YMM library architecture.

Step-by-step Derivation:
YMM Library is structured as a layered verification framework. The complete composition includes: (1) Standard Library—foundational UVM classes; (2) Register Abstraction Layer—for register model creation and access; (3) Hardware Abstraction Layer—for modeling hardware interfaces and protocols; (4) Scoreboarding—for maintaining expected vs. actual transaction results. All four are integral components of the YMM Library specification, making option D the comprehensive and correct answer.