27. Which of the following control mechanisms is common to both observation and recording control a. Confirmation slips b. Dual observation C. Preprinted forms d. Turn around document 28. A very effective ID approach for safeguarding logical computer access bases user recognition on A IDA B. Biometric identifications c. Message acknowledgment procedures d. Routing verification procedures 29. Which of the following is not a subcategory of input controls ? A Computer access B. Data transcription C. Data recording D. Data processing 30. Logical access to the computer system would be best controlied by A. Intrusion alarm systems B. Complex operating systems C. Restrictions on physical access to online terminals D. Password codes 31. Which of the following is true about control totals 2 A Usually expressed in dollars B. Batches normally occur in groups of 200 or more C. Should "make sense" to be useful D. None of the above 32. A data field could pass all editing tests and still be invalid. Additional controls to cope with this would include: A Check digit B. Unfound record test C. Valid code test D. A and B 33. Check digits have which of the following attributes ? A Guarantees data validity B. Detect fraudulent data C Always recommended for accounting information systems D. None of the above