IT &computer MCQ section 7 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (b)

Token is an efficient form of message passing frequently used in ring networks. It consists of a very short message that circulates around the ring in a logical direction when devices are idle. To transmit, the device must seize the token. Token provides fair access for all stations, and eliminates the collisions of contention-based access methods.

Answer: (c)

A local area network (LAN) is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media.

The defining characteristics of LANs, in contrast to wide area networks (WANs), include their usually higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines.

Answer: (a)

The process is known as index definition. The order in which columns are listed in the index definition is important. A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of slower writes and increased storage space. Indices can be created using one or more columns of a database table, providing the basis for both rapid random lookups and efficient access of ordered records.

Answer: (a)

Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication and power supply between computers and electronic devices. USB was designed to standardize the connection of computer peripherals to personal computers, both to communicate and to supply electric power.

Answer: (a)

Random-access memory (RAM) is a form of computer data storage. A random-access device allows stored data to be accessed in very nearly the same amount of time for any storage location, so data can be accessed quickly in any random order. In contrast, other data storage media read and write data only in a predetermined order.