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

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.

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: (a)

Principal components of a processor (CPU) include the arithmetic logic unit (ALU) that performs arithmetic and logic operations, processor registers that supply operands to the ALU and store the results of ALU operations, and a control unit that fetches instructions from memory and “executes” them by directing the coordinated operations of the ALU, registers and other components.

Answer: (a)

A byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.

Historically, a byte was the number of bits used to encode a single character of text in a computer and for this reason, it is the basic addressable element in many computer architectures.