Institution: AGRANI BANK LTD Exam: Agrani bank Ltd - Senior Officer - 12.08.2011
Topic: ICT (তথ্য ও যোগাযোগ প্রযুক্তি), Subject: Computer and ICT (তথ্য ও যোগাযোগ প্রযুক্তি)

Best Answer Explained in Below-:

When personal computers are connected together, they create a network. A network enables multiple devices to communicate and share resources, such as files, printers, and internet connections. It can be as simple as a few computers linked in a home environment or as complex as thousands of devices interacting across the globe in a larger organizational context.

The term 'supercomputer' (option A) refers specifically to a high-performance computing system designed to process vast amounts of data and perform complex calculations, typically for scientific research or large-scale simulations. A 'server' (option B), on the other hand, is a specialized computer that provides data, resources, or services to other computers (clients) in a network, but does not constitute the network itself. The option 'multiple computer' (option D) is vague and does not effectively capture the concept of interaction and connectivity.

In summary, when personal computers connect, they form a network—an interconnected system that facilitates communication, collaboration, and resource sharing among multiple computing devices. Hence, the correct answer is option C: network.