Computers and IT MCQs

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A zebibyte is a unit of data storage. It is equal to 2 to the 70th power, or 1,180,591,620,717,411,303,424 bytes. While a zettabyte can be estimated as 10^21 or 1,000,000,000,000,000,000,000 bytes, a zebibyte is exactly 1,180,591,620,717,411,303,424 bytes.

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A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running on a computing device, e.g., a laptop, desktop, smartphone, across a VPN may therefore benefit from the functionality, security, and management of the private network. Encryption is a common, though not an inherent, part of a VPN connection.

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SyteK Inc. developed the NetBIOS protocol in 1983. NetBIOS stands for Network Basic Input/Output System. The protocol was later adopted by IBM for networking in their PC Network. SyteK Inc. was later renamed Hughes LAN Systems Inc. Microsoft integrated NetBIOS into its operating systems for network communication.

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Machine Language or Machine code is a strictly numerical language which is intended to run as fast as possible. This was used in the first computers.

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Random-access memory or RAM is a form of computer memory which is used to store the working data and machine code. The RAM make sure the data is returned instantly when asked for.

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A data definition or data description language (DDL) is a syntax similar to a computer programming language for defining data structures, especially database schemas. DDL statements create and modify database objects such as tables, indexes, and users. Common DDL statements are CREATE, ALTER, and DROP.

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Keystroke logging, often referred to as keylogging is the action of recording (logging) the keys struck on a keyboard. It is typically a covert thing, so that person using the keyboard is unaware that their actions are being monitored. Data can then be retrieved by the person operating the logging program. Virtual Keyboard reduces the risk of keystroke logging for the password entry.

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Symantec is an American consumer software company now known as NortonLifeLock. It is the make of famous software Norton.

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The Macintosh was the brand name of the personal computers designed and sold by Apple Inc. since January, 1984. Since 1998, it was branded as Mac.

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Devices like keyboard and mouse are used to input data and instructions to the computer and are called the input unit.