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

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The following question based on IT & computer topic of general awareness mcq

Questions : Most of the computers available today are :

(a) 5th generation computers

(b) 3rd generation computers

(c) 4th generation computers

(d) 6th generation computers

The correct answers to the above question in:

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.

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Read more it and computer Based General Awareness Questions and Answers

Question : 1

The Simplest CPU – scheduling algorithm is ______.

a) Multilevel scheduling algorithm

b) SJF scheduling algorithm

c) Round robin scheduling algorith

d) FCFS scheduling algorithm

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.

Question : 2

Optic fibres are used in place of wire cables because

a) they do not require boosting

b) they generate strong magnetic fields

c) they do not generate magnetic fields

d) they are more economical

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.

Question : 3

Who invented E-Mail?

a) Vinton Cerf

b) Tim Berners-Lee

c) James Gosling

d) VA Shiva Ayyadurai

Answer: (d)

V.A. Shiva Ayyadurai, an Indian-born American scientist and entrepreneur, developed a computer program in 1978, which replicated the features of the interoffice, inter-organizational paper mail system. He named his program “EMAIL”.

It was the world’s first full-scale electronic emulation of mail system consisting of:

  1. Inbox,
  2. Outbox,
  3. Folders,
  4. the Memo, and
  5. Attachments, etc.

The US Copyright Office issued a Certificate of Registration to him on the program in 1982.

Question : 4

In IT, the method for updating the main memory as soon as a word is removed from the cache is called

a) Protected – write

b) Write – through

c) Write – back

d) Cache – write

Answer: (c)

The write-back method involves updating only the cache location and to mark it as updated with an associated flag bit, often called the dirty or modified bit. The main memory location of the word is updated later when the block containing this marked word is to be removed from the cache to make room for a new block.

The reason for the write-back method is that during the time a word resides in the cache, it may be updated several times.

Question : 5

Which of the following devices is generally used to check multiple choice questions ?

a) MICR

b) OCR

c) OMR

d) Bar Code Reader

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.

Question : 6

In IT terminology failure in the kernel is called as

a) Dump

b) Crash

c) C r a s h dump

d) Kernel error

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.

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