IT &computer MCQ section 1 MCQ Questions & Answers Detailed Explanation

Answer: (c)

When the page (data) requested by a program is not available in the memory, it is called a page fault.

It occurs when a program accesses a page that has been mapped in address space but has not been loaded in its main memory (RAM). This usually results in the application being shut down.

Answer: (c)

The Epson HX-20 (also known as the HC-20) is generally regarded as the first laptop computer, announced in November 1981, although first sold widely in 1983.

It was hailed by Business Week magazine as the “fourth revolution in personal computing”.

Answer: (a)

WiMAX stands for Worldwide Interoperability for Microwave Access. It is a family of wireless communication standards based on the IEEE 802.16 set of standards, which provide multiple physical layers (PHY) and Media Access Control (MAC) options.

WiMAX is sometimes referred to as “Wi-Fi on steroids” and can be used for broadband connections, hotspots, etc.

Answer: (b)

Round robin is the scheduling algorithm used by the CPU during the execution of the process. Round robin is designed specifically for time-sharing systems.

It is similar to the first come first serve scheduling algorithm but the preemption is the added functionality to switch between the processes.

Answer: (b)

Adhoc mode is a framework in which devices or stations communicate directly with each other, without the use of an Access Point (AP). Ad-hoc mode is also referred to as peer-to-peer mode or an Independent Basic Service Set (IBSS).

Ad-hoc mode is useful for establishing a network where wireless infrastructure does not exist or where services are not required.

Answer: (d)

DVD stands for Digital Versatile Disk. It is an optical disc storage format, invented and developed by Philips, Sony, Toshiba and Panasonic in 1995.

When first invented, DVD stands for Digital Video Disk. Later on, DVD Forum proposed the backronym Digital Versatile Disk.