Computer Awareness Mixed Quiz: Set 39

A digital signature is made by hashing the document and encrypting that digest with the signer's private key.

Symmetric encryption uses one shared secret key for both locking and unlocking data, and because it is the older and simpler of the two families it is variously called conventional, secret key or private key encryption.

On such a platform both the buyer and the seller are enterprises: a factory sources raw material, components, machinery or packaging from suppliers, and the orders are usually bulk orders with negotiated prices, credit terms and long-term supply contracts.

The Video Graphics Array connector is a D-shaped plug with fifteen pins in three rows of five, usually coloured blue, and it carries an analogue video signal only, so a separate cable is needed for sound.

The diamond or rhombus is the decision symbol: it holds a condition and has one entry with two exits, marked Yes and No, so the flow branches according to the test.

In a piconet one device acts as the master and sets the clock and the hopping sequence, and up to seven other devices can be active slaves at the same time, which makes eight devices in the piconet in all.

An internal command is written into the command interpreter COMMAND.COM and is loaded into memory along with the operating system, so it can be used even when no separate program file is present on the disk.

Linus Torvalds, then a student in Finland, wrote the Linux kernel in 1991 and released it under the GNU General Public License, which is why Linux is the standard example of open source software in question papers.

In a key pair, whatever one key locks only the other can unlock. So a message encrypted with the receiver's public key can be opened only by the receiver's private key, which nobody else holds; that is exactly what confidentiality requires.

Section 3 provides that an electronic record is authenticated by affixing a digital signature created by use of an asymmetric crypto system and a hash function; the hash function reduces the record to a message digest and the signer's private key encrypts it, while anyone can verify it with the…

This Act is the legal foundation of electronic commerce in India: it recognised electronic records as equivalent to paper records, gave digital and later electronic signatures the status of a signature, provided for certifying authorities, and created the offences under which online fraud such as identity theft and cheating by…

The 802.15 family covers wireless personal area networks, the very short-range links meant to join the devices a single person carries, and Bluetooth was standardised within it as IEEE 802.15.1.

The oval is the terminal symbol, and a well-formed flowchart has exactly one Start terminal and at least one Stop terminal; a chart that can never reach a Stop describes an infinite loop and so breaks the finiteness property of an algorithm.

Pratyush was installed at the Indian Institute of Tropical Meteorology in Pune in 2018, with a companion system, Mihir, at the National Centre for Medium Range Weather Forecasting, and the pair was acquired to run high-resolution models for monsoon forecasting, cyclone tracks and climate studies.

The name stands for print working directory, and the command prints the complete path of the directory in which the shell is placed at that moment, counted from the root directory written as a single forward slash.

The integrated circuit packs many transistors and other components onto a single silicon chip, and computers built on it were far smaller, cheaper and more reliable than their predecessors.

The Advanced Encryption Standard is the Rijndael cipher, designed by the Belgian cryptographers Joan Daemen and Vincent Rijmen, which won an open competition and was adopted in 2001 in place of the ageing Data Encryption Standard.

EDI is the computer-to-computer exchange of standard business documents such as purchase orders, invoices, despatch advices and payment instructions, in an agreed format, without paper and without a person re-typing the data at the other end.

Muhammad ibn Musa al-Khwarizmi was a ninth-century Persian mathematician and astronomer whose treatise on calculation with Hindu-Arabic numerals reached Europe in Latin translation; his Latinised name produced the word algorithm, and another of his works gave the word algebra.

The cat command, short for concatenate, writes the contents of one or more files to the standard output, which is normally the screen, and so does the work of TYPE in MS-DOS.