Computer_Class VII

Computer Class VII (DPS Joka South Kolkata)

1. How does a barcode reader work?

A barcode reader shines a light beam across the barcode and measures the amount of light that is reflected back to identify the code. The dark bars reflect less light than the white space between them.  And then translates the code into numbers and or letters, which are input into the computer. The computer uses this information to identify the product.

2. Write an advantage of OCR technology.

The main advantage of OCR technology is that it enables us to convert any type of document whether it is a scanned paper document, a PDF file, or an image captured by a digital camera into editable and searchable data. This prevents retyping of data and makes the data entry fast and efficient. However, if the document is not typed properly or written clearly, it becomes difficult for the OCR Software to recognize the characters.

3. What is OMR? Write its one disadvantage.

The advantage of OMR is if the boxes are not properly filled or if a mark is too light, the OMR device may not able to recognize it.

4. How is a smart card different from a magnetic strip card?

A smart card looks similar to a magnetic strip card but contains a microchip instead of a magnetic strip. The microchip is placed under a gold contact pad on one side of the card.

5. What is a plotter? List different types of plotters.

A plotter is an output device used to produce hard copies of high-quality graphs and designs, such as architectural plans, business, charts, construction maps, and engineering drawings,  Plotters are similar to printers, but they use ink pens or inkjet to draw graphics on paper or polyester film.

Drum plotter, Flatbed plotter, and ink Jet plotter are the different types of plotters.

6. What is a MICR?

MICR refers to the technique of recognizing characters printed in the MICR typeface using magnetic ink. MICR is widely used in books for processing cheques, as it is difficult to forge the magnetic ink characters. Bank cheques usually have cheque number, city code, bank code, and branch code printed in magnetic ink at the bottom. This information is scanned by the MICR reader when the cheque is passed through it and is stored in the Computer.

7. What is the role of output devices?

Output devices are used to get output from the computer and present it in a form that the users can understand.

Match the related options.

Smart card- Contains a microchip placed under a gold contact pad.

OMR-Use for checking answer sheets of objective-type exams.

OCR-Use to input typed, printed, or handwritten text into a computer.

MICR-Used for processing of bank cheques.

Inkjet plotter- Used in designing billboards, road Signs, and banners.

Fills in the blanks

• A computer works according to a set of instructions, Called Programs.
• A Drum plotter is used to produce continuous output, such as a plotter of earthquake activity.
• A barcode is a unique communication of vertical bars of varying widths and sizes.
• The magnetic in is a special ink that contains magnetized particulars of iron oxide.
• The SIM Card used in mobile phones is a Smart Card.
• OCR stands for Optical Character Recognition.

8. What do plotters use to draw graphics on paper?

Ans:- Ink Pens and Ink Jets.

9. Which technology is used in banks for Cheque processing?

Ans-MICR.

10. Which device is used to display output from a computer onto a large screen?

Ans:-LCD Projector

11. Which type of plotter is used in designing ships, cars, and buildings?

12. Flatbed Plotter.

A Barcode Reader is also called a price Scanner.

13. MICR technology is commonly used for answer sheets of objective-type exam that contains multiple choice questions

14.The main tool that you can use to interact with Windows 7 is window explorer.

• By default Windows 7 includes four libraries.
• Press Shift+ Delete keys on the keyboard to permanently delete a file or folder from the local hard disk.
• To open a file select it and then click the open button on the toolbar.
• Click the view button on the toolbar to change the size and appearance of your files and folder.

15. Which of the following is the default library in Windows 7?

Ans:- Document and Pictures.

16. You can rename a selected folder by pressing the key on the keyboard?

Ans:- F3

17. Which menu contains the option to move a folder one place to another place?

Ans:- Edit Menu

18.Which keys will you press on the Keyboard to delete a folder permanently?

Ans:-Shift+Delete

19. Which of the following views displays detailed information about files and folders?

Ans:- Details.

20. You can not copy files or folders by using the Drag and Drop Method.

21.You can copy files or folders by using Ctrl+ Drag and Drop Method.

22. When you delete a file from a pen drive it does not go to the Recycle Bin.

23.The Tiles view displays the file and folder as medium size icons along with the basic information.

24. The cut and paste option are available in the Edit Menu.

25. What is a window explorer?

Ans:-Window explorer is a program that let you look through the entire contents of the Computer. Such as drives, folders, and files in a hierarchical structure.

26. Write a short not on Libraries.

Ans:-Libraries is a kind of folder that provides a central place to access files that are stored in different locations throughout our Computer it displays the files stored in different locations as a single collection and hides their actual locations.

27. The steps to Seach a folder on the Computers are:-

Ans- 

i)Type the name of the file/folder on the keyboard in the search box at the top right corner of the Explorer Window.

ii) Press the enter key. The Search results appear as you start typing.

iii) Click on the desired result in the list to access the desired file/folder.

28.  Name different views available in Windows 7.

The different views are:-

Ans:-i) Extra Large Icons ii) Large Icons iii) Medium Icons iv) Small Icons v) List vi) Details vii) Tiles viii) Content.

29. How will you change the file?

• Select the file/folder you want to rename.
• Click the file menu and then click.
• Type a new name for the file/folder.
• Press the Enter Key. The file on the folder is renamed.

30. How will you change the name of a file?

Rename means changing the name of an existing file/folder. To rename a file /folder using Windows Explorer, we will have to follow these steps.

• Select the file/folder you want to rename.
• Click the file menu and then click rename.

 Fill in the blanks:-

• (HTML)  tags describe how a webpage should be displayed
• The content written within the (head) element is not displayed on the Webpage.
• To view an (HTML) document, you need a web browser.
• An (HTML edition) is a software application used to Create and save HTML documents.
• (Mark-up) is the Special code that describes to the web browser how parts of the HTML document are to be processed.
• (Attributes) provide additional information about HTML element.

 31. What does HTML stand for?

Ans-   Hypertext Mark-up Language.

32. Which of the following is not a text editor?

Ans-   Adobe Dreamweaver.

33. Which of the following is the correct HTML code for adding background color?

Ans:- BODY BG COLOURS “RED”.

34. Which character is used to indicate a closing tag?

A-     /

35. Which HTML element is used to give a title for a Web page?

Ans:-TITLE

36. By default, the text color in a Web page is.

Ans:-   Black.

ALWAYS REMEMBER:-

• The hexadecimal code for purple color is # 800080.
• You can use a text editor to write HTML code.
• The Head element is not an empty element.
• Before using HTML you must have knowledge of any other programming language.
• The HTML element can be nested.
• An HTML document always begins with <HTML> tag.

37. Describe the FONT Element and its attributes.

Ans:- The Font element allows changing the Font type, Size color of the text in an HTML document it is a container element. It uses different attributes to enhance the text in the web page these attributes are given below:-

Face:- It is used to specify the FONT in which the text is to be displayed. The FONT name is specified as the value of this attribute.

COLOUR:- It is used to specify the color of the text enclosed with it <FONT> and </FONT> Tags. By default, the color of the text is black.

SIZE:- it is used to specify the size of the text. There are seven sizes available for the FONT ranging from 1 to 7. The size seven represents the highest Size; while 1 represents the lowest size. The default size of the font is 3.

38. Write any two rules that are to be followed while writing HTML Code.

Ans:- HTML Tag means attribute names are not case sensitive. That is, whether will write <BODY>,<BODY>,<BODY>, it all means the same while writing the tags name cannot contain Space. The browser does not recognize the tags having spaces in it and consequently it displays the wrong output.

39. Mention differences between the following:-

i) Container and an empty element.

ii) WYSIWYG and Text editor.

Container Element	Empty Element
A container element has both opening and closing tab Eg-Head Tag	An empty element only has an opening Tab Eg-HR Tag.

WYSIWYG Editor	Text Editor
WYSIWYG is an acronym for "what you see is what you get". This Editor provides a graphical interface and tools that let users develop web pages quickly and easily. You need not require HTML Codes rather we can directly insert images, hyperlinks, and tables into the web pages, and the code is generated automatically.	Text editor where we have to write tags and attributes properly so it takes time.   In a text editor, we have codes using the proper tag in order to insert images, hyperlinks, and tables.

40. Give the basic structure of an HTML document.
Ans- The basic structure of an HTML document is given below

<!DOCTYPE html>
<html>
<body>

<h1>My First Heading</h1>
<p>My first paragraph.</p>

</body>
</html>

41. Name the component that makes you the HTML code.
Ans:- Element, tags, attributes are the components that make you the HTML code.

42. Different elements of HTML?
Ans:-An HTML element usually consists of a starting tags and ending tags, with the content inserted in it. The slashing tag is similar to the opening tags except that is preceded with a forward slash(/).

43. What is the role of HTML and attributes?
Ans:- Attributes provides additional information about HTML elements. They are always specified inside the opening tag after the tag name. Each attribute has a name and a value.

44. Define the HTML heading.
Ans- The heading are specified in an HTML page using the heading elements. HTML provides six levels e.g Of heading, <H1>, <H6>, the bracket H1 being the larger point while <H6> defines the smallest. 

Please Click Below to See the HTML Elements /Tags

Example of HTML Tag/Elements

Example of HTML Attributes