Final answer:
A System Administrator is responsible for tasks such as updating hardware and software, performing troubleshooting, and maintaining computer systems. This role is critical within an organization's IT department and is essential for ensuring the systems' efficient operation.
Step-by-step explanation:
The duties for a System Administrator can encompass various aspects of managing and ensuring the effective operation of computer systems within an organization. Of the descriptions provided, number 2 is the closest match, which states that the individual updates an organization's computer hardware and software, performs troubleshooting, and maintains the operating system of a computer system. System Administrators are instrumental in the IT field and are responsible for the upkeep, configuration, and reliable operation of computer systems; especially multi-user computers, such as servers.
Unlike computer engineers who design computers and computer programs, or software developers who focus on developing new applications, System Administrators are more concerned with existing systems and their maintenance. This role is critical in the hierarchy of authority within an organization's IT department, where System Administrators may report to IT Managers or Directors. As the IT industry grows, so does the demand for skilled System Administrators, making this a robust career path with opportunities for advancement into different specializations.