IT &computer MCQ section 2 MCQ Questions & Answers Detailed Explanation

Answer: (b)

A floppy disk is a thin magnetic-coated disk contained in a flexible or semi-rigid protective jacket. Data is stored in tracks and sectors. The floppy disks are usually 3.5" in size.

However, older floppy disks may be in use; these would be 5.25" in size. Double-sided high density 3.5" disks can hold 1.44 Mb of data.

Answer: (d)

A modem (modulator-demodulator) is a device that modulates an analogue carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.

The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data.

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)

The three-finger salute refers to the original PC-compatible system command to reboot or restart a computer by pressing three keys simultaneously: Control, Alt and Delete.

The three-key combination of Control-Alt-Delete is specifically designed to be impossible to execute with one hand in order to avoid the potential for accidental reboots. It was developed by David Bradley.

Answer: (a)

In a computer, storage is the place where data is held in an electromagnetic or optical form for access by a computer processor. It is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers.

Answer: (d)

In computer programming, an event handler is an asynchronous callback subroutine that handles inputs received in a program. Each event is a piece of application-level information from the underlying framework, typically the GUI toolkit.

GUI events include key presses, mouse movement, action selections, and timers expiring. Event handlers are a central concept in event-driven programming.