Trace the representation and the procedure
Information questions often become easier when you separate representation, processing and interpretation. Bytes and bits measure different units; converting a file size before dividing by a transmission rate prevents an eightfold error. Character encoding determines how a byte sequence is interpreted as text, while image compression concerns how visual information is represented. For an algorithm, write the state after each iteration and observe the loop boundaries. Nested loops need a count of the inner iterations, not a product assumed without checking. In a spreadsheet, distinguish a relative reference from a fixed row or column before copying a formula. For data, calculate the requested statistic and then ask what the sample can support. A correlation does not establish causation, and a voluntary response can introduce selection bias. Security controls address particular threats: authentication, backups and access control have different roles. Explain the mechanism of a proposed control rather than assuming any familiar technical term solves every problem.