The best recommendation for an organization that is unable to add new servers on demand in a cost-efficient manner is to build a virtual environment. A virtual environment is a technology that allows multiple virtual machines to run on a single physical server, sharing its resources and capabilities. A virtual environment can help the organization add new servers on demand in a cost-efficient manner by reducing the need for hardware acquisition, maintenance, and power consumption. The other options are not as effective as building a virtual environment, as they do not address the root cause of the problem or provide the same benefits.
Increasing the capacity of existing systems is a short-term solution that can help improve the performance and availability of the current servers, but it does not enable the organization to add new servers on demand in a cost-efficient manner. Upgrading hardware to newer technology is a costly solution that can help enhance the functionality and reliability of the servers, but it does not enable the organization to add new servers on demand in a cost-efficient manner. Hiring temporary contract workers for the IT function is an irrelevant solution that can help supplement the IT staff's skills and knowledge, but it does not enable the organization to add new servers on demand in a cost-efficient manner. References: CISA Review Manual (Digital Version), Chapter 3, Section 3.3.1

The quality assurance (QA) phase is the phase where the IS auditor should first examine requirements from an in-house SDLC project that has not met user specifications. This is because the QA phase is the phase where the system is tested and verified against the user specifications and the design specifications to ensure that it meets the functional and non-functional requirements, as well as the quality standards and expectations. The QA phase involves various testing activities, such as unit testing, integration testing, system testing, acceptance testing, performance testing, security testing, etc., to identify and resolve any defects, errors, or deviations from the specifications12.
The configuration phase is not the phase where the IS auditor should first examine requirements from an in- house SDLC project that has not met user specifications. The configuration phase is the phase where the system is installed and configured on the target environment, such as hardware, software, network, etc., to prepare it for deployment and operation. The configuration phase may involve activities such as installation, customization, migration, integration, etc., to ensure that the system is compatible and interoperable with the existing infrastructure and systems34.
The user training phase is not the phase where the IS auditor should first examine requirements from an in- house SDLC project that has not met user specifications. The user training phase is the phase where the end- users are trained and educated on how to use the system effectively and efficiently. The user training phase may involve activities such as developing training materials, conducting training sessions, providing feedback and support, etc., to ensure that the users are familiar and comfortable with the system features and functions56.
The development phase is not the phase where the IS auditor should first examine requirements from an in- house SDLC project that has not met user specifications. The development phase is the phase where the system is coded and built based on the design specifications and the user specifications. The development phase may involve activities such as programming, debugging, documenting, etc., to create a working prototype or a final product of the system

An application's audit trail is a record of all actions or events that occur within or affect an application, such as user activities, system operations, data changes, errors, exceptions, etc. An audit trail can provide evidence and accountability for an application's functionality and performance, and support auditing, monitoring, troubleshooting, and investigation purposes. An IS auditor should ensure that an application's audit trail has adequate security, which means that it is protected from unauthorized access, modification, deletion, or disclosure. Adequate security can help ensure that an audit trail maintains its integrity, reliability, and availability, and prevents tampering or manipulation by attackers or insiders who want to hide their tracks or evidence of their actions. Logs all database records is a possible feature of an application's audit trail, but it is not the most important thing for an IS auditor to ensure, as logging all database records may not be necessary or feasible for some applications, and may generate excessive or irrelevant data that can affect the storage or analysis of the audit trail. Is accessible online is a possible feature of an application's audit trail, but it is not the most important thing for an IS auditor to ensure, as online accessibility may not be required or desirable for some applications, and may introduce security or privacy risks for the audit trail. Does not impact operational efficiency is a desirable outcome of an application's audit trail, but it is not the most important thing for an IS auditor to ensure, as operational efficiency may not be the primary objective or concern of an application's audit trail, and may depend on other factors or trade-offs such as storage capacity, performance speed, or data quality.

The best way to provide assurance of the integrity of a firewall log is to ensure that the log cannot be modified. A firewall log is a record of the traffic and events that occur at the firewall, which is a device or software that controls and filters the incoming and outgoing network traffic based on predefined rules and policies. The integrity of a firewall log means that the log is accurate, complete, consistent, and valid, and that it has not been altered, deleted, or corrupted by unauthorized or malicious parties. The IS auditor should verify that the firewall log has adequate controls to prevent or detect any modification of the log, such as encryption, hashing, digital signatures, write-once media, or tamper-evident seals. The other options are not as effective as ensuring that the log cannot be modified, because they either do not address the integrity of the log data, or they are monitoring or retention measures rather than preventive or detective controls. References:
CISA Review Manual (Digital Version)1, Chapter 5, Section 5.2.4