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Field automation reference copying

MediumUVM ComponentsSystemVerilog

A transaction registers a nested object field with `uvm_field_object(child, UVM_DEFAULT | UVM_REFERENCE)`. After dst.copy(src), changing dst.child also changes src.child. Why?

Choose one

Answer choices

  1. A. UVM_DEFAULT disables the copy operation
  2. B. copy always aliases every object field regardless of flags
  3. C. The factory replaced child with a singleton
  4. D. UVM_REFERENCE requests handle copying for that field, so both parents refer to the same child object
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