IT &computer MCQ section 2 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (d)

WLL stands for Wireless in local loop, is a term for the use of a wireless communications link as the “last mile / first mile” connection for delivering plain old telephone service (POTS) and/or broadband Internet to telecommunications customers.

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.

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: (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: (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.