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
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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The impact of EDI on internal controls will be: A. that fewer opportunities for review and authorization will exist. B. an inherent authentication. C. a proper distribution of EDI transactions while in the possession of third parties. D. that IPF management will have increased responsibilities over data center controls.
Facilitating telecommunications continuity by providing redundant combinations of local carrier T-1 lines, microwaves and/or coaxial cables to access the local communication loop is: A. last mile circuit protection. B. long haul network diversity. C. diverse routing. D. alternative routing.
When assessing the portability of a database application, the IS auditor should verify that: A. a structured query language (SQL) is used. B. information import and export procedures with other systems exist. C. indexes are used. D. all entities have a significant name and identified primary and foreign keys.
The PRIMARY reason for using digital signatures is to ensure data: A. confidentiality. B. integrity. C. availability. D. timeliness.
During which phase of a system development process should an IS auditor first raise the issue of application controls? A. Construction B. System design C. Acceptance testing D. Functional specification
The corporate office of a company having branches worldwide, developed a control self-assessment program (CSA) for all its offices. Which of the following is the MOST important requirement for a successful CSA? A. Skills of the workshop facilitator B. Simplicity of the questionnaire C. Support from the audit department D. Involvement of line managers
A decrease in amplitude as a signal propagates along a transmission medium is known as: A. noise. B. crosstalk. C. attenuation. D. delay distortion.
The act that describes a computer intruder capturing a stream of data packets and inserting these packets into the network as if it were another genuine message stream is called: A. eavesdropping. B. message modification. C. a brute-force attack. D. packet replay.
Good quality software is BEST achieved: A. through thorough testing. B. by finding and quickly correcting programming errors. C. determining the amount of testing by the available time and budget. D. by applying well-defined processes and structured reviews throughout the project.
Which of the following independent duties is traditionally performed by the data control group? A. Access to data B. Authorization tables C. Custody of assets D. Reconciliation
As part of the business continuity planning process, which of the following should be identified FIRST in the business impact analysis (BIA)? A. Organizational risks, such as single point-of-failure and infrastructure risk B. Threats to critical business processes C. Critical business processes for ascertaining the priority for recovery D. Resources required for resumption of business
The knowledge base of an expert system that uses questionnaires to lead the user through a series of choices before a conclusion is reached is known as: A. rules. B. decision trees. C. semantic nets. D. data flow diagrams.