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

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)

The process is known as index definition. The order in which columns are listed in the index definition is important.

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)

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.

Answer: (a)

As the name suggests, read-only memory, or ROM, stores information that can only be read. It contains the basic instructions for what needs to happen when a computer is powered on. This is typically referred to as the firmware of a computer.

The firmware represents the basic code to get the computer started. Once the computer is up and running, the CPU takes over. Firmware is also referred to as BIOS, or basic input/output system.

Answer: (b)

Invoking thread cancellation requests cancellation, but actual cancellation depends on thread state. Cancellation only occurs when the thread reaches the cancellation point which happens only when cancellation is enabled.

At the cancellation point, the cancellation request is acted upon and the thread to be terminated is allowed to perform application-specific cleanup processing.