1,000+ ASIC Interview Questions: SystemVerilog, UVM & RTL

DescriptionQ550

Q550DVASIC interview problem

Configure two reusable agents in one environment

TechniquesUVMAgent configurationAnalysis portsEnvironment

DifficultyMedium

TopicUVM Components

LanguageSystemVerilog

Requirements4 checkpoints

Design an environment with two instances of one bus agent, an optional scoreboard, and independently optional coverage subscribers.

Class declarationSystemVerilog

class dual_bus_env extends uvm_env;
  bus_agent a0, a1;
  bus_scoreboard sb;
endclass

Use this case to check your interpretation

Input

a0 is active on vif0; a1 is passive on vif1; scoreboard enabled; coverage only on a1

Output

both monitors publish, only a0 drives, the scoreboard sees both streams, and only cov1 samples

Explanation

Per-instance configuration changes policy without modifying or duplicating the reusable agent class.

Factory-create both agents with distinct instance names.
Give each agent its own configuration and virtual interface.
Create optional subscribers from environment configuration.
Connect monitor analysis ports without leaking protocol details into the environment.