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Which of the following is the MOST effective type of antivirus software to detect an infected application?
A. Scanners
B. Active monitors
C. Integrity checkers
D. Vaccines
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The correct answer is C
A. Scanners look for sequences of bits called signatures that are typical of virus programs. They examine memory, disk boot sectors, executable files and command files for bit patterns that match a known virus. Therefore, scanners need to be updated periodically to remain effective.
B. Active monitors interpret disk operating system (DOS) and read-only memory (ROM) basic input-output system (BIOS) calls, looking for virus-like actions. Active monitors can be misleading, because they cannot distinguish between a user request and a program or virus request. As a result, users are asked to confirm actions such as formatting a disk or deleting a file or set of files.
C. Integrity checkers compute a binary number on a known virus-free program that is then stored in a database file. This number is called a cyclical redundancy check (CRC). When that program is called to execute, the checker computes the CRC on the program about to be executed and compares it to the number in the database. A match means no infection; a mismatch means that a change in the program has occurred. A change in the program could mean a virus.
D. Vaccines are known to be good antivirus software. However, they need to be updated periodically to remain effective.
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Which of the following BEST describes an integrated test facility? A. A technique that enables the IS auditor to test a computer application for the purpose of verifying correct processing B. The utilization of hardware and/or software to review and test the functioning of a computer system C. A method of using special programming options to permit printout of the path through a computer program taken to process a specific transaction D. A procedure for tagging and extending transactions and master records that are used by an IS auditor for tests
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Which of the following is a network architecture configuration that links each station directly to a main hub? A. Bus B. Ring C. Star D. Completed connected
If an application program is modified and proper system maintenance procedures are in place, which of the following should be tested? The: A. integrity of the database B. access controls for the applications programmer C. complete program, including any interface systems D. segment of the program containing the revised code
Digital signatures require the: A. signer to have a public key and the receiver to have a private key. B. signer to have a private key and the receiver to have a public key. C. signer and receiver to have a public key. D. signer and receiver to have a private key.
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Which of the following components of a business continuity plan is PRIMARILY the responsibility of an organization?s IS department? A. Developing the business continuity plan B. Selecting and approving the strategy for business continuity plan C. Declaring a disaster D. Restoring the IS systems and data after a disaster
Sales orders are automatically numbered sequentially at each of a retailer's multiple outlets. Small orders are processed directly at the outlets, with large orders sent to a central production facility. The MOST appropriate control to ensure that all orders transmitted to production are received and processed would be to: A. send and reconcile transaction counts and totals. B. have data transmitted back to the local site for comparison. C. compare data communications protocols with parity checking. D. track and account for the numerical sequence of sales orders at the production facility.
A programmer included a routine into a payroll application to search for his/her own payroll number. As a result, if this payroll number does not appear during the payroll run, a routine will generate and place random numbers onto every paycheck. This routine is known as: A. scavenging. B. data leakage. C. piggybacking. D. a trojan horse.
The BEST defense against network eavesdropping is: A. encryption. B. moving the defense perimeter outward. C. reducing the amplitude of the communication signal. D. masking the signal with noise.
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