Question Discussion & Solution

The correct answer is Alt+F4.

Key Points

• Alt+F4 is a shortcut key that is used to close the currently active window.
• To stop the current window this shortcut has been used.
• For example: if we pressed the shortcut key now while reading this page on your computer browser, it would close the browser window and all open tabs.

How to Use this Shortcut Key

• To use the keyboard shortcut Alt+F4, press Alt andF4 Key simultaneously.

• While running any program in Microsoft Windows, if Alt+F4 is pressed, it closes the currently active program.
• If no programs are open or we are at the desktop, pressing Alt+F4 opens the Shutdown window.

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Additional Information

Functions of other shortcut Keys in computer

• Alt + Tab
  • Alt+Tab  can be used to switch to any running program that has an application-level window.
  •  It can be used to alternate between the two most recent tasks.
  •  It acts as an alternate between a full-size window and the desktop.
• Alt+E
  • ​It is a shortcut key most often used to open the Edit file menu option for programs supporting a file menu.
  • In Google Sheets, pressing Alt+E opens the Edit file menu option.
  • In Chrome, pressing Alt+E opens the Chrome menu.
  • In Microsoft Internet Explorer and Mozilla Firefox, pressing Alt+E opens the Edit file menu.
• F1
  • Used as the help key in almost every program, it opens a help screen when this key is pressed.
  • Windows Key + F1 opens the Microsoft Windows help and support center.
  • It opens the Task Pane.
• Cntrl+1
  • Ctrl+1 is a shortcut key most often used to switch to the first tab in a browser or other programs with tab support.
  • The "1" (one) used with this shortcut is the "1" at the top of the keyboard, not on the numeric keypad.
  • It is also known as  Control 1 and C-1.

The correct answer is Interconnection and networks.

Key Points

• Internet:
  • The term Internet is derived from the words interconnection and networks. Hence, Option 4 is correct.
  • The Internet (or internet) is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices.
  • It is a network of networks that consists of private, public, academic, business, and government networks of local to global scope, linked by a broad array of electronic, wireless, and optical networking technologies.
  • The Internet carries a vast range of information resources and services, such as the inter-linked hypertext documents and applications of the World Wide Web (WWW), electronic mail, telephony, and file sharing. 
  • The first web page address was http://info.cern.ch/hypertext/WWW/TheProject.html.
  • ARPANET adopted TCP/IP on January 1, 1983.
  • NCSA Mosaic ran on Windows computers was the first browser to surf the internet. 

Additional Information

• A computer network is mainly of four types:
  • LAN(Local Area Network)
  • PAN(Personal Area Network)
  • MAN(Metropolitan Area Network)
  • WAN(Wide Area Network) 

Explanation:

• Parenchyma, Sclerenchyma, and Collenchyma are the Simple Permanent Plant tissues.
• Xylem and Phloem are the Complex Permanent Plant tissue.
• Sclerenchyma: supporting tissue in higher plants.
• Parenchyma: makes up most of the cells within leaves, flowers, and fruits.
• Collenchyma: provides support, structure, tensile strength, and flexibility which helps the plant to bend.
• Xylem:
  • It is plant tissue that transports food water and other dissolved minerals from roots to other parts of the plant.
• Phloem:
  • The main function of the phloem is to transport food materials from the leaf to other parts of the plant.

The correct option is, i.e. Brain.

• Hypothalamus-
  • The Hypothalamus is a part of Brain that plays a crucial role in many important functions of the Human Body.
  • The hypothalamus is located below the thalamus in the brain.
  • The hormones from the hypothalamus govern physiological functions such as temperature regulation, thirst, hunger, sleep, mood, and the release of other hormones within the body.
  • Hypothalamus regulates the pituitary gland.

The correct answer is Shift + Space.

• Short-cut key to Select entire row in M.S. Excel Worksheet is Shift + Space.

Key Points

• This table lists the most frequently used shortcuts in Excel.