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| Section | Weight | Objectives |
|---|---|---|
| Information Systems Auditing Process | 21% | - Audit Reporting and Follow-up - Audit Standards and Guidelines - Audit Planning and Execution |
| Information Systems Acquisition, Development and Implementation | 12% | - Testing and Implementation Controls - System Development Lifecycle (SDLC) - Project Management Controls |
| Information Systems Operations and Business Resilience | 23% | - Business Continuity and Disaster Recovery - Service Level Management - IT Operations Management |
| Protection of Information Assets | 27% | - Data Protection and Security Monitoring - Information Security Governance - Access Control and Identity Management |
| Governance and Management of IT | 17% | - IT Governance Frameworks - IT Policies and Procedures - Risk Management and Compliance |
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質問 # 711
Which of the following is the MOST effective type of antivirus software?
正解：A
解説：
Section: Protection of Information Assets
Explanation:
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. Scanners look for sequences of bits called
signatures that are typical of virus programs. They examine memory, disk boot sectors, executables and
command files for bit patterns that match a known virus. Therefore, scanners need to be updated
periodically to remain effective. Active monitors interpret DOS and 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 like formatting a disk or deleting a file or
set of files. Vaccines are known to be good antivirus software. However, they also need to be updated
periodically to remain effective.
質問 # 712
Time constraints and expanded needs have been found by an IS auditor to be the root causes for recent violations of corporate data definition standards in a new business intelligence project. Which of the following is the MOST appropriate suggestion for an auditor to make?
正解：A
解説：
Explanation/Reference:
Explanation:
Provided that data architecture, technical, and operational requirements are sufficiently documented, the alignment to standards could be treated as a specific work package assigned to new project resources.
The usage of nonstandard data definitionswould lower the efficiency of the new development, and increase the risk of errors in critical business decisions. To change data definition standards after project conclusion (choice B) is risky and is not a viable solution. On the other hand, punishing the violators (choice D) or delaying the project (choice C) would be an inappropriate suggestion because of the likely damage to the entire project profitability.
質問 # 713
Which of the following term related to network performance refers to the number of corrupted bits expressed as a percentage or fraction of the total sent?
正解：B
解説：
Section: Information System Operations, Maintenance and Support
Explanation:
Error rate is the number of corrupted bits expressed as a percentage or fraction of the total sent For your exam you should know below information about Network performance:
Network performance refers to measurement of service quality of a telecommunications product as seen by the customer.
The following list gives examples of network performance measures for a circuit-switched network and one type of packet-switched network (ATM):
Circuit-switched networks: In circuit switched networks, network performance is synonymous with the grade of service. The number of rejected calls is a measure of how well the network is performing under heavy traffic loads. Other types of performance measures can include noise, echo and so on.
ATM: In an Asynchronous Transfer Mode (ATM) network, performance can be measured by line rate, quality of service (QoS), data throughput, connect time, stability, technology, modulation technique and modem enhancements.
There are many different ways to measure the performance of a network, as each network is different in nature and design. Performance can also be modeled instead of measured; one example of this is using state transition diagrams to model queuing performance in a circuit-switched network. These diagrams allow the network planner to analyze how the network will perform in each state, ensuring that the network will be optimally designed.
The following measures are often considered important:
Bandwidth - Bandwidth is commonly measured in bits/second is the maximum rate that information can be transferred Throughput - Throughput is the actual rate that information is transferred Latency - Latency is the delay between the sender and the receiver decoding it, this is mainly a function of the signals travel time, and processing time at any nodes the information traverses Jitter - Jitter is the variation in the time of arrival at the receiver of the information Error Rate - Error rate is the number of corrupted bits expressed as a percentage or fraction of the total sen The following answers are incorrect:
Bandwidth - Bandwidth is commonly measured in bits/second is the maximum rate that information can be transferred Throughput - Throughput is the actual rate that information is transferred Latency - Latency is the delay between the sender and the receiver decoding it, this is mainly a function of the signals travel time, and processing time at any nodes the information traverses Reference:
CISA review manual 2014 page number 275
質問 # 714
An IS auditor notes that not all security tests were completed for an online sales system recently promoted to production. Which of the following is the auditor's BEST course of action?
正解：A
解説：
Explanation
The IS auditor's best course of action when reviewing the use of an outsourcer for disposal of storage media is to determine exposure to the business. Storage media, such as hard disks, tapes, flash drives, or CDs, may contain sensitive or confidential information that needs to be protected from unauthorized access, disclosure, or misuse. The IS auditor should verify that the outsourcer has a process that appropriately sanitizes the media before disposal, such as wiping, degaussing, shredding, or incinerating, and that the process is effective and compliant with the organization's policies and standards. The IS auditor should also assess the potential impact and risk to the business if the storage media is not properly sanitized or disposed of, such as data breaches, reputational damage, legal or regulatory penalties, or loss of competitive advantage. The other options are not the best course of action, because they either do not address the root cause of the problem, or they are reactive rather than proactive measures. References: CISA Review Manual (Digital Version)1, Chapter 5, Section 5.2.7
質問 # 715
Which of the following is the BEST control to ensure data entered into a calculation program is accurate?
正解：A
質問 # 716
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