IT &computer MCQ section 3 MCQ Questions & Answers Detailed Explanation

Answer: (c)

A central processing unit (CPU) is the hardware within a computer system that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system.

Two typical components of a CPU are the arithmetic logic unit (ALU), which performs arithmetic and logical operations, and the control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary.

In most computers, the shuffling of data between the CPU and RAM happens millions of times every second.

Answer: (b)

Bluetooth is a proprietary open wireless technology standard for exchanging data over short distance from fixed and mobile devices, created by telecom vendor Ericsson in 1994.

Answer: (c)

www stands for the World Wide Web which is a system of Internet servers that support specially formatted documents. The documents are formatted in a markup language called HTML (HyperText Markup Language) that supports links to other documents, as well as graphics, audio, and video files.

Answer: (c)

A communications satellite works like a relay station: signals transmitted by the ground stations are picked up by the satellite’s receiver antennas, the signals are filtered, their frequency changed and amplified, and then routed via the transmit antennas back down to Earth.

The redirected signals are received by ground stations, also called earth stations and further processed to extract the baseband signals.

Answer: (a)

Icons on the screen of a computer are picture commands.

Answer: (c)

Tata Consultancy Services emerged as the country’s No. 1 software exporter in 2001-02 with an export earning of Rs. 3,882 crore.

Infosys occupied the second position with Rs. 2,553 crore while Wipro was the third-largest software exporter with export revenue of Rs. 2,298 crore.