Which of the following is not an access control?

Random access is not considered an access control because it refers to the ability to access data or memory locations in any order, rather than being a specific mechanism for controlling who can access a system or its resources. Access control typically involves methods and policies that define who or what is allowed to access resources and includes various types of permissions or restrictions based on user roles, identity, or attributes.

In contrast, developer access, building access, and customer access are all forms of access control that manage user permissions for specific resources. Developer access relates to permissions granted to developers to modify or manage software applications or systems. Building access refers to physical access control measures to secure the physical premises, such as key cards or entry codes. Customer access pertains to the permissions given to customers to use a service or a product, often defined by specific roles and privileges. Thus, while the other options represent specific types of access controls, random access does not fit this definition.