The advantage of using agile software development methodology over the waterfall methodology is that it allows for quicker deliverables. Agile software development is an iterative and incremental approach that emphasizes customer feedback, collaboration, and adaptation. Agile software development delivers working software in short cycles, called sprints, that typically last from two to four weeks. This enables the development team to respond to changing requirements, deliver value faster, and improve quality. Waterfall software development is a linear and sequential approach that follows a predefined set of phases, such as planning, analysis, design, implementation, testing, and maintenance. Waterfall software development requires a clear and stable definition of the project scope, deliverables, and expectations before starting the development process. Waterfall software development can be slow, rigid, and costly, especially if changes occur during the later stages of the project. References: CISA Review Manual (Digital Version), Chapter 3:
Information Systems Acquisition, Development and Implementation, Section 3.1: Project Management Practices

The absence of a right-to-audit clause in the outsourcing contract for a cloud service provider would be of greatest concern to an IS auditor1. This clause gives the client the right to audit the service provider's activities that are relevant to the services being provided1. It is crucial for ensuring that the service provider is complying with the terms of the contract and meeting the client's standards for performance, security, and other aspects1. Without this clause, the client may not be able to effectively monitor and manage risks associated with the outsourcing arrangement1.
References:
Audit rights in outsourcing: certifications and third party reports

Verification of hash totals is a detective control. A detective control is a control that aims to identify and report errors or irregularities that have already occurred. Verification of hash totals is a technique that compares the hash values of data before and after transmission or processing to detect any changes or corruption. The other options are examples of other types of controls, such as programmed edit checks (preventive), backup procedures (recovery), and use of pass cards (preventive). References: CISA Review Manual, 27th Edition, page 223

The most important thing for the company to verify when outsourcing the printing of customer statements is whether the provider's information security controls are aligned with the company's. This is because customer statements contain sensitive personal and financial information that need to be protected from unauthorized access, disclosure, modification or destruction. The provider's information security controls should be consistent with the company's policies, standards and regulations, and should be audited periodically to ensure compliance. The other options are also relevant, but not as critical as information security. References: CISA Review Manual (Digital Version)1, Chapter 3, Section 3.2.2