COMPUTERS & INFORMATION TECHNOLOGY

COMPUTERS & INFORMATION TECHNOLOGY

Useful Quick Revision Notes on Computers & IT: Bank PO Exams, IBPS Exam, Bank Clerk Grade exam

• Early computing machines, like the ENIAC, were actually meant to assist the armed forces.
• The printers in pre-1950s were punch cards.
• An improvement on the ENIAC, which pioneered ‘stored program’, was made possible with the help of the mathe-matician John von Neumann.
• Before the 1950s, computers were mostly owned by universities and research labs.
• The B-programming language was developed by Ken Thompson.
• Famous people, associated with the ENIAC, EDVAC, UNIVAC computers are Eckert & Mauchly.
• The 1st commercially produced and sold computer (1951) was UNIVAC.
• IBM was provided software for PCs by Microsoft.
• Time-sharing, teletyping, were associated with mainframe computers.
• The transformation from heavy computers to PCs was made possible using microprocessors.
• The first microprocessor was developed in 1971 by Intel.
• The term ‘micro’ (extremely small) denotes 10–6 m.
• The Harvard student, who chose to write computer programs and dropped studies was Bill Gates.
• A pentium 4 (P-4) employs roughly 40 million transistors.
• Mark-1, Apple-1, and collossus were initial desktop computers.
• Binary digits are briefed as bit.
• A collection of bits is called byte.
• C++, is a computer language.
• The process of eliminating pro-gramming faults is called debugging.
• Starting up on operating system is called booting.
• A program used to browse the web is called browser.
• An error in software designing which can even cause a computer to crash is called bug.
• Click and double-click are achieved using the mouse.
• Java, C, ForTran, Pascal and BASIC are computer programming languages.
• The device which sends computer data using a phone line is called MODEM.
• ‘Worm’ and ‘virus’ are actually programs.
• A ‘file’ is a unit of information.
• A megabyte has 106 (million) bytes.
• A small, single-site network is called LAN.
• A processor that collects several data and sends them over a single line is called bridge.
• ‘Nano’ stands for one billionth part.
• The number of bit patterns using an n-bit code is 2n.
• The part of a computer that works with the data/programs is called CPU.
• To convert a binary number to a decimal, we have to express it in power of 2.
• www stands for world wide web.
• Mathematics employed in computers is called Boolean algebra.
• A collection of 8 bits is called byte.
• The first home computer (1977), which was sold in millions of units was Apple II.
• ‘PARAM’ is a supercomputer.
• A website containing periodic posts is called blog.
• While cutting and pasting, the cut item is temporarily stored in the clipboard.
• http stands for hypertext transfer protocol.
• The unwanted or non-requested e-mails are called “spam”.
• A computer framed to give various network services is called server.
• SSL is an acronym for Secure Sockets Layer. SSL provides a secure connection, allowing you to transmit private data online. Sites secured with SSL display a padlock in the browsers URL and possibly a green address bar if secured by an EV SSL certificate