Computer Awareness Questions

The correct answer is a Flatbed scanner.

Key Points

• The flatbed scanner is used to scan documents by placing them upside down on a glass plate.
• A flatbed scanner provides a flat, glass surface to hold a sheet of paper, book, or another object for scanning.
• The scan head is moved under the glass.
• Flatbed scanners often come with sheet feeders for scanning multiple sheets of paper rather than one at a time.

Additional Information

Working of Flatbed Scanner:

• For modern scanners, a Charge-coupled device [CCD] is used.
• A CCD sensor is used to capture the light from the scanner and then convert it into proportional electrons.
• The charge developed will be more if the intensity of light that hits on the sensor is more. 

The correct answer is Ctrl + D.

Key Points

• Use the Ctrl+D keyboard shortcut to quickly summon the Font dialog box.
• The best benefit of the Font dialog box is its Preview window, at the bottom.
• This window shows you exactly how your choices affect text in your document.
• The Font names +Body and +Heading refer to the fonts selected by the current document theme.

Additional Information

• Important Shortcut keys:
  • Cut the selected content to the Clipboard - Ctrl+X
  • Copy the selected content to the Clipboard - Ctrl+C
  • Paste the contents of the Clipboard -Ctrl+V
  • Increase the font size by 1 point.- Ctrl+]
  • Center the text - Ctrl+E.
  • Align the text to the left - Ctrl+L

The correct answer is Esc.

Key Points

• Esc key does not appear in duplicate on a standard QWERTY keyboard.
• QWERTY is a keyboard design for Latin-script alphabets.
• The name comes from the order of the first six keys on the top left letter row of the keyboard (Q W E R T Y).
• The QWERTY design is based on a layout created for the Sholes and Glidden typewriter and sold to E. Remington and Sons in 1873.

Additional Information

• Esc is a key found on the top-left corner of a computer keyboard.
• It allows the user to abort, cancel, or close an operation.
• For example, if a web page was loading slow on an Internet browser, pressing the Escape key stops the download. 

The correct answer is ASCII.

Key Points

• The FAT (File Allocation Table) uses the traditional 8.3 file naming convention and all filenames must be created with the ASCII character set. 
• An 8.3 filename (also called a short filename or SFN) is a filename convention used by old versions of DOS and versions of Microsoft Windows prior to Windows 95 and Windows NT 3.5.
• It is also used in modern Microsoft operating systems as an alternate filename to the long filename for compatibility with legacy programs.
• The filename convention is limited by the FAT file system.
• Similar 8.3 file naming schemes have also existed on earlier CP/M, TRS-80, Atari, and some Data General and Digital Equipment Corporation minicomputer operating systems.

Additional Information

• ASCII abbreviated as American Standard Code for Information Interchange is a character encoding standard for electronic communication. 
• The Internet Assigned Numbers Authority (IANA) prefers the name US-ASCII for this character encoding.

• ASCII is one of the IEEE milestones. 

The correct answer is Versatility, Diligence.

Key Points

• Versatility is the characteristic of a computer to perform completely different types of work at the same time, whereas diligence makes it to work for hours without boredom or tiredness. 
• Versatility means the capacity of the computer of performing more than one task at the same time.
• Diligence is the capacity of the computer of performing repetitive tasks without getting tired.
• A computer is free from tiredness, lack of concentration, fatigue, etc therefore it can work for hours without creating any errors.

Additional Information

Characteristics of Computer System are:

• Speed - A computer works with much higher speed and accuracy compared to humans while performing mathematical calculations. 
• Accuracy - Computers perform calculations with 100% accuracy. 
• Diligence - A computer can perform millions of tasks or calculations with the same consistency and accuracy. 
• Versatility
• Reliability
• Memory

The correct answer is Subscript.

Key Points

• While writing equations in MS-Word, the subscript feature is used to type very small letters/numbers below the line of text. 
• A subscript is a character or string that is smaller than the preceding text and sits at or below the baseline.
• For subscript and superscript follow these steps:
  • Select the text or number that you want to subscript or superscript
  • For superscript, press Ctrl, Shift, and the Plus sign (+) at the same time.
  • For subscript, press Ctrl and the Equal sign (=) at the same time. (Do not press Shift).

Additional Information

Important Shortcut keys used in MS Word:

• Cut the selected content to the Clipboard - Ctrl+X
• Copy the selected content to the Clipboard - Ctrl+C
• Paste the contents of the Clipboard - Ctrl+V
• Increase the font size by 1 point.- Ctrl+]
• Center the text - Ctrl+E.
• Align the text to the left - Ctrl+L.

The correct answer is (i) False, (ii) False.

Key Points

• Ctrl + Y is used to perform a "redo" operation in MS-Word.
• Ctrl + Z is used to perform an "undo" operation in MS-Word. 
• Undo means to cancel or reverse the effects or results of (a previous action or measure).
• Redo means to do (something) again or differently.

Additional Information

Important Shortcut keys used in MS Word:

• Cut the selected content to the Clipboard - Ctrl+X
• Copy the selected content to the Clipboard - Ctrl+C
• Paste the contents of the Clipboard -Ctrl+V
• Increase the font size by 1 point.- Ctrl+]
• Center the text - Ctrl+E.
• Align the text to the left - Ctrl+L.

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 Network of networks.

Key Points

• The Internet is a global wide area network that connects computer systems across the world.
• It includes several high-bandwidth data lines that comprise the Internet "backbone".
• These lines are connected to major Internet hubs that distribute data to other locations, such as web servers and ISPs. 
• Therefore, it is called the 'Network of networks'.

Additional Information

• Vint Cerf is widely known as the father of the Internet.
• Vint is the co-designer with Robert Kahn of TCP/IP protocols and basic architecture of the Internet. 
• Bob Kahn and Vint Cerf were the two who first invented the internet.
• The first web page went live on August 6, 1991.

The correct answer is Monitor.

Key Points

• In computing, an input device is a piece of equipment used to provide data and control signals to an information processing system such as a computer or information appliance.
• A 'keyboard' is a human interface device that is represented as a layout of buttons. 

Additional Information

Some input and output devices of computer:

• Input
  • Keyboard
  • Mouse
  • Scanner 
  • Cameras
  • Microphones
• Output 
  • Printer 
  • Monitor
  • Plotter