Question Discussion & Solution

The correct answer is Write-Once Read-Many.

Key Points

• CDs are also known as WORM discs, for “Write Once Read Many.”
• A rewritable version based on excitable crystals and known as CD-RW was introduced in the mid-1990s.
• In computer storage media, WORM (write once, read many) is a data storage technology that allows information to be written to a disc a single time and prevents the drive from erasing the data.

Additional Information

Some important abbreviations used in Computer:

• BIOS - Basic Input Output System
• CAD - Computer-Aided Design
• EDVAC - Electronic Discrete Variable Automatic Calculator
• EPROM - Erasable Programmable Read-Only Memory
• FORTRAN - FORmula TRANslation
• GPRS - General Packet Radio Service 

The correct answer is Baidu.

Key Points

• BAIDU:
  • Baidu search engine is the Chinese search engine developed by Baidu Inc in the year 2000.
  • According to the Alexa Internet rankings, Baidu is currently the fourth largest website.
  • Services provided by the search engine - Baidu Baike (online encyclopedia), Baidu Wangpan (cloud storage services), Baidu Tieba (keyword-based discussion forum).
  • It has been blocked by the government in India in 2020.

Additional Information

• PACKETS:
  • Donald Davies gave this term in the year 1965.
  • The word 'packet' in computer terminology refers to a segment of data sent from one computer or device to another over a network.
  • A packet contains some important information like - source, destination, data, size, etc.
• COOKIES:
  • The web-browser programmer, Lou Montulli gave the term 'cookie'.
  • The text files containing data like username and password, that identify a computer over a network are known as 'cookies'.
  • HTTP cookies are a specific type of cookies stored on the user's computer and used to identify specific users by the web browser while browsing a website, thus improving the web browsing experience.
  • Cookies remember information and record the browsing activity of the user.

The Correct Answer is Virus.

• A piece of programming code inserted into another program to cause damage is called Virus.
• A computer virus is a type of computer program that replicates itself when executed by altering other programs on the computer and adding its own code. The affected areas are then said to be 'infected' with a computer virus when this replication succeeds.

Important Points

• The collective name for a variety of malicious variants of software, including viruses, ransomware and spyware, is malware. Malware, shorthand for malicious software, usually consists of cyber-attacker-developed code designed to inflict significant data and device harm or to obtain unauthorized access to a network.
• Spam is some form of unwanted digital correspondence that is sent out in bulk, unsolicited.

The correct answer is (i) only.

Key Points

• CD-R stands for Compact Disk-Recordable.
• CD-RW stands for Compact Disk-ReWritable.
• CD-RW disks are expensive than CD-R disks.
• CD-R (COMPACT DISC – Recordable) is a digital optical disc storage format.
• A CD-R disc is a compact disc that can be written once and read arbitrarily many times.
• CD-R discs (CD-Rs) are readable by most plain CD readers.

Additional Information

• A Compact Disc Recordable (CD-R) is a Write Once Read Multiple (WORM) disc.
• These discs can only record data once and then the data becomes permanent on the disc.
• A Compact Disc Re-Writable (CD-RW) is an erasable disc that can be reused. 
• A CD-R is typically 700 MB of memory.

The correct answer is Joint Photographic Experts Group.

Key Points

• JPEG stands for Joint Photographic Experts Group.
  • It is a computer graphics file format.
  • JPEG is a lossy compression method widely used for digital photographs.
  • In JPEG, the image is compressed to make a smaller file.
  • Compression results in a loss of quality, however, so it is usually undetectable.
  • JPEG files are widely used on the Internet, and JPEG is a popular digital camera format, making it ideal for non-professional printing and web use.
  • JPEG format is best for web images, non-professional printing, e-mail, PowerPoint.
  • The extensions ".jpeg" and ".jpg" are used for JPEG files.

Additional Information

• PNG (Portable Network Graphics) files are a lossless picture format that was created to replace and improve upon the gif format.
• GIF files (Graphics Interchange Format) are used for web graphics and can be animated and transparent.
• BMP (Bitmap Image File) is a file format designed by Microsoft for Windows that does not compress or lose information, allowing images to have very high quality while simultaneously having very large file sizes.