IT &computer MCQ section 7 MCQ Questions & Answers Detailed Explanation

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.

Answer: (b)

System management is designed to balance processing and input/output, with the aim of providing reasonable minimum turnaround and maximum throughput. Turnaround is the amount of time elapsing between a request to the computer to execute a program or input and the availability of output.

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: (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: (b)

The acronym PDA stands for Personal Digital Assistant. Also known as a handheld PC, or personal data assistant, it is a mobile device that functions as a personal information manager.

The term evolved from Personal Desktop Assistant, an application that prompts or prods the user of a computer with suggestions or provides a quick reference to contacts and other lists.