The root of all evil

Understanding $root scope in SystemVerilog

This is an easy conceptual question on SystemVerilog's hierarchical design. It tests whether you understand the scope hierarchy and how to reference the top-level module instance in a testbench or simulation environment.

Questions like this are common in digital design interviews because they probe familiarity with SystemVerilog's scope resolution mechanisms. You need to distinguish between different scope references and know when and why you would use each one. The answer requires understanding the role of the root scope in the overall module hierarchy.

• Module hierarchy and scope resolution
• Difference between scope references in SystemVerilog
• Cross-hierarchy signal access in testbenches