IT &computer MCQ section 3 Practice Questions Answers Test with Solutions & More Shortcuts

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.

Answer: (a)

Icons on the screen of a computer are picture commands.

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: (d)

Transistor technology is the new buzzword in the computer world. Replacing silicon transistors with carbon nanotubes could make any electronic device — smartphones, laptops, tablets and supercomputers — smaller and more powerful using less energy than those built using silicon-based transistors.

Scientists at Stanford University, in September 2013, announced to have built the first functioning computer that used only carbon nanotube transistors.

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.