Difficulty: Easy · Puzzle 2 of 6 · Topic: Queue and Array Puzzles
After assignment and independent mutations, what are `q1` and `q2`?
module p2;
int q1[$] = '{1,2,3};
int q2[$];
initial begin
q2 = q1;
q1.pop_front();
q2.push_back(4);
$display("q1=%p q2=%p", q1, q2);
end
endmoduleQueues are unpacked value types, not class handles.
1) `q2 = q1` copies queue contents into a separate queue.
2) `q1.pop_front()` changes only q1 to `{2,3}`.
3) `q2.push_back(4)` changes only q2 to `{1,2,3,4}`.Answer: q1=' {2,3}, q2=' {1,2,3,4}
Candidates sometimes project class-handle aliasing behavior onto queues.
What collection type in SV would alias by handle instead of value?