IT &computer MCQ section 6 MCQ Questions & Answers Detailed Explanation

Answer: (c)

Fourth Generation computers are modern-day computers. It began in 1971 when the Intel 4004 chip took the integrated circuit one step further by locating all the components of a computer (central processing unit, memory, and input and output controls) on a minuscule chip.

The microprocessor is the characteristic of fourth-generation computers, capable of performing all of the functions of a computer's central processing unit.

Answer: (d)

First-Come, First-Served (FCFS) Scheduling is the simplest CPU scheduling algorithm. It is like customers waiting in line at the bank or the post office or at a copying machine. Under it, the process that requests the CPU first is allocated the CPU first. However, the average waiting time under FCFS is long.

Answer: (c)

Optical fibres are used instead of metal wires because signals travel along with them with less loss and are also immune to electromagnetic interference.

Besides, there are no radiated magnetic fields around optical fibres; the electromagnetic fields are confined within the fibre.

Since fibre optics do not radiate electromagnetic energy, emissions cannot be intercepted.

Answer: (c)

Optical Mark Reader (OMR) is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked. It is specially used for checking the answer sheets of examinations having multiple choice questions.

Answer: (b)

The kernel (also called nucleus) is a computer program that constitutes the central core of a computer’s operating system. It is the first program loaded on startup, and then manages the remainder of the startup, as well as input/output requests from software, translating them into data processing instructions for the central processing unit. Its failure is called crash.

Answer: (c)

Body Map is an interactive visual search tool that allows users to explore the human body in 3-D. With easy-to-use navigation, users can search multiple layers of the human anatomy, view systems and organs down to their smallest parts, and understand in detail how the human body works.