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At most, how many references may be and have caused a NullPointerException to be thrown from the following line of code? booleancorrect-queue.peek().getNameOO.is8lankO; 1 2 3

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At most, how many references may be and have caused a NullPointerException to be thrown from the following line of code? booleancorrect-queue.peek().getNameOO.is8lankO; 1 2 3 4

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