Orchestration is the process of automating multiple tasks across different systems and applications. It can help save time and reduce human error by executing predefined workflows and scripts. In this case, the systems administrator can use orchestration to create accounts for a large number of end users without having to manually enter their information and assign permissions. Reference: CompTIA Security+ Study Guide: Exam SY0-701, 9th Edition, page 457 1

An external examination (also known as an external audit or external review) is the best method for the Chief Information Security Officer (CISO) to gain an understanding of how the company's security policies compare to external regulatory requirements. External examinations are conducted by third- party entities that assess an organization's compliance with laws, regulations, and industry standards.
Penetration tests focus on identifying vulnerabilities, not compliance.
Internal audits assess internal controls but are not impartial or focused on regulatory requirements.
Attestation is a formal declaration but does not involve the actual evaluation of compliance.

Daily vulnerability scans help identify missing patches or updates across endpoints, allowing security teams to ensure compliance with patch management policies.

Side loading is the process of installing applications from unofficial sources, often bypassing standard app stores. This increases the risk of installing malicious software, such as a rootkit, which is a type of malware designed to provide persistent privileged access while hiding its presence.
Reference:
CompTIA Security+ SY0-701 Official Study Guide, Domain 2.1: "Side loading applications from unofficial sources can introduce malware, such as rootkits, to the system." Exam Objectives 2.1: "Compare and contrast different types of threats."