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

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: (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: (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.

Answer: (c)

The Atanasoff–Berry Computer (ABC) was the world’s first electronic digital computer, albeit not programmable. Atanasoff is considered to be one of the fathers of the computer. In late 1939, John Atanasoff teamed up with Clifford Berry to build a prototype.

They created the first computing machine to use electricity, vacuum tubes, binary numbers and capacitors. The capacitors were in a rotating drum that held the electrical charge for the memory. The final product was the size of a desk, weighed 700 pounds, had over 300 vacuum tubes, and contained a mile of wire.