MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Operating systems usually come pre-loaded on any computer you buy. Most individuals use the operating system that already comes with their computer however it is possible to upgrade or change the initial operating system to suit your preference. Different operating systems will work in different ways.

Detailed explanation-2: -Android: 39.19%, Windows: 35.12, iOS: 13.85%, MAC OS: 5 %, Linux: 0.77% are some numbers for the market share of these companies.

Detailed explanation-3: -An operating system (OS) is a program that oversees the processes on a computer. All desktops, laptops, tablets and mobile devices have an OS. It coordinates the operations necessary to make the device run, and it ensures the applications and software function without interfering with one another.

Detailed explanation-4: -Modern operating systems provide a general-purpose mechanism for processing data larger than available main memory called virtual memory. Transparent to the program, swapping moves parts of the data back and forth from disk as needed.