Discussion
The nesting depth recorded in a symbol table entry is used to
Answer: B
Correct answer: determine how many access links to follow at run time
The difference between the nesting depth of the use and that of the declaration is exactly the number of links to traverse, and the compiler computes it from the two symbol table entries. That is why the depth is recorded: it turns a run-time search into a fixed number of pointer dereferences known at compile time.
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