Final answer:
Among the listed options, 'timeliness' and 'perceived quality' are dimensions of service quality, focusing on the speed of service delivery and the customer's overall impression of the service.
Step-by-step explanation:
The dimensions of service quality include elements such as timeliness, which refers to the speed of service delivery, and perceived quality, which is the customer's impression of the service's overall excellence. While durability, performance, and conformance are typically associated with product quality, service quality focuses more on the customer's experience with the service. Hence, for the question 'Which of the following are dimensions of service quality?', the correct answers are timeliness and perceived quality. Durability, performance, and conformance are not considered specific dimensions of service quality but might relate to product quality.