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Understanding callbacks in SystemVerilog verification

This is an easy conceptual question that tests foundational knowledge of callback mechanisms in SystemVerilog. It appears frequently in verification interviews because callbacks are a core pattern for reactive, event-driven testbench design.

The question probes whether you understand how to decouple components, respond to stimulus dynamically, and structure reusable verification infrastructure. In practice, callbacks allow testbenches to register functions or methods that execute in response to specific conditions or events, reducing tight coupling and enabling flexible stimulus-response flows.

• Function pointers and delegates in SystemVerilog
• Event-driven testbench architecture
• Decoupling test logic from stimulus generation
• Practical use in monitors, scoreboards, and predictors