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

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.

Answer: (d)

Bluetooth is a wireless technology standard for exchanging data over short distances, creating personal area networks (PANs) with high levels of security. It can connect several devices, overcoming problems of synchronization.

Answer: (b)

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is an electronic circuit on one small plate ("chip") of semiconductor material, normally silicon. Such a circuit can be made very compact, having up to several billion transistors and other electronic components.

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)

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: (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.