Computer Science

Option: C
Explanation :Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged in a Linux distribution.

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Option: D
Explanation :BIOS which stands for Basic Input Output System, is software stored on a small memory chip on the motherboard. It’s BIOS that’s responsible for the POST and therefore makes it the very first software to run when a computer is started. The BIOS firmware is non-volatile, meaning that its settings are saved and recoverable even after power has been removed from the device.
BIOS instructs the computer on how to perform basic functions such as booting and keyboard control. BIOS is also used to identify and configure the hardware in a computer such as the hard drive, floppy drive, optical drive, CPU, memory, and related equipment.

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Option: B
Explanation :Microsoft Corporation is an American multinational technology company with headquarters in Redmond, Washington(USA). It develops, manufactures, licenses, supports, and sells computer software, consumer electronics, personal computers, and related services. Its best known software products are the Microsoft Windows line of operating systems, the Microsoft Office suite, and the Internet Explorer and Edge web browsers.

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Option: D
Explanation :In Microsoft Word and other word processor programs, pressing Ctrl+R aligns the line or selected text to the right of the screen.
In Microsoft Outlook, pressing Ctrl+R replies to an e-mail.
In Microsoft PowerPoint, the Ctrl+R shortcut key aligns the line or selected text to the right side of the slide.
In Microsoft Excel and other spreadsheet programs, pressing Ctrl+R fills the row cell to the right with the contents of the selected cell.
In all major Internet browsers (e.g., Chrome, Edge, Firefox, Opera), pressing Ctrl+R refreshes (reloads) the open page.

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Option: D
Explanation :compact discs or CDs can be divided into three main categories. (1)read-only (2) write-once disc (3) Erasable or Rewrite-able CD
(1) Read Only:- These discs you purchase with the data or information already on the compact disk.
The information is placed on the compact disk at the time the disc is manufactured. All you can do with the disc is play or read it.
(2) Write Once Disc:- This compact disc is also known as the recordable CD or CD-R. This disc is purchased blank and information can be written or recorded to the disc. Once the disc is full, it essentially becomes a read-only disc because no more information can be recorded to the disc and the previously recorded information cannot be erased and the compact disc cannot be reused.
(3) Erasable or Rewrite-able CD:- The third type of compact disc is the erasable or rewriteable CD known as the CD-RW. This disc is also purchased blank. Information can be written to the disc and then this information can be erased and the compact disk reused.

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Option: A
Explanation :Ctrl+Alt+F4:-have no generic description for this shortcut.
Alt+F4:- is a shortcut key most often used to close the current active window all programs. For example, if you pressed the shortcut key now while reading this page on your computer browser, it would close the browser window and all open tabs.
Ctrl+F4:- In Microsoft Windows, pressing Ctrl+F4 will close the active tab or window in a program that supports more than one tab or window to be opened.

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Option: D
Explanation :Alibaba Chinese multinational e-commerce claimed that products worth $38.4 billion were sold from its platform. Most users bought electronic products and fashion items on the 11th edition of the Singles Day shopping event.
In 2009, Alibaba group started a shopping event on 11th November called Single’s Day. The annual event soon gained more popularity than the Black Friday and Cyber Monday shopping sales. The sales on this year Single’s Day are equal to 80% of Amazon’s sales in the latest quarter.
The shopping event for 2019 kicked off with a live performance by Taylor Swift. According to Alibaba executives the platform sold products worth $1 billion just 68 seconds into the annual event. It only took Alibaba 30 minutes to reach the $10 billion mark.
Here’s the breakdown of the sales value each year since its launch:

2009: $10 Million
2010: $140 Million
2011: $800 Million
2012: $3.1 Billion
2013: $5.8 Billion
2014: $9.3 Billion
2015: $14.3 Billion
2016: $17.7 Billion
2017: $25.3 Billion
2018: $30.8 Billion
2019: $38.4 Billion

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Option: B
Explanation :The collaboration builds on the unprecedented digital success of the ICC World Cup 2019, which cemented cricket’s position as one of the world’s most watched sports.
The International Cricket Council on Thursday(26-sep-2019) announced a landmark deal with Facebook which will become the exclusive digital content rights partner for ICC global events and will also carry post-match recaps throughout the rest of the world through to 2023.
The collaboration builds on the unprecedented digital success of the ICC World Cup 2019, which cemented cricket’s position as one of the world’s most watched sports, netting 4.6 billion #CWC19 video views across ICC’s digital and social media platforms.
Facebook will carry a range of digital content across four years including match recaps, in-play key moments and other match and feature content, giving the hundreds of millions of cricket fans in the region the opportunity to deepen their engagement with the sport with more content available than ever before.

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Option: D
Explanation :Main Task of Educational Computer are preserve the information, analysis of data, scoring the answer, enhances creativity & thinking skills, efficient & better use of IT Technology, improves research work & helps in communicating with different education providers, huge & organized store of information, quick processing of data, audio-visual guides in teaching process for a viable learning.

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Option: C
Explanation :A smart card, chip card, or integrated circuit card (ICC) is a physical electronic authorization device, used to control access to a resource. It is typically a plastic credit card sized card with an embedded integrated circuit. Many smart cards include a pattern of metal contacts to electrically connect to the internal chip. Others are contactless, and some are both. Smart cards can provide personal identification, authentication, data storage, and application processing.
Applications include identification, financial, mobile phones (SIM), public transit, computer security, schools, and healthcare. Smart cards may provide strong security authentication for single sign-on (SSO) within organizations. Several nations have deployed smart cards throughout their populations.

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