Std 7 - Chapter - 7 More on Internet

Chapter - 7

More on Internet

1.	What is World Wide Web?
	The World Wide Web (abbreviated as WWW or W3 commonly known as the web) is a system of interlinked hypertext documents accessed via the Internet. With a web browser, one can view web pages that may contain text, images, videos, and other multimedia and navigate between them via hyperlinks.
2.	What is the impact of Internet on our society?
	The Internet has greatly influence our society, government, commerce and other institutions.  It is changing the way we live, work, learn, govern and communicate.
3.	How do you check your result online?
	Open the website to be searched. Click the Results option. Type your roll number and Click Submit.
4.	Name the facility on the Internet used to communicate with people instantly.
	Using the chat facility on the Internet, you can talk and communicate with people all around the world in no time.  Yahoo Messenger, Gtalk, Windows Live Messenger, Skype are some the popular chat software.
5.	Which Internet facility allows you to send cards online?
	E-Greeting Card website are used to send online greetings.
6.	Give two examples for each of the following:
	Search Engine Sites: Google, Bing People Finder: www.piple.com, www.lullar.com E-Greeting Cards: www.123greetings.com, www.e-cards.com Instant Messengers: Yahoo Messenger, Gtalk
7.	How do you save a picture from a webpage to your hard disk?
	·         Open any search engine and click Images option. ·         Type the name of the image you are searching for. ·         Click Search Images button. ·         Open the suitable image in the search engine website. ·         Right-click on the image and select Save Picture As option ·         Locate the folder where you want to save the image. ·         Click Save Button.
8.	What is downloading?
	Downloading is the method by which you access files, software, information from a remote computer using Internet.
9.	What is the use of people-finder sited?
	We can find our classmates, relatives and other great personalities pm the Internet.
10.	How do you copy text from a web page to a document
	·         Select the text you want to copy from the web page, by dragging the mouse over the text. ·         Right click and select copy. ·         Open the document where you want to paste. ·         Right-click and paste.
11.	How is Internet used in the field of education?
	Internet is used in the field of education for online learning, giving online tests and see online results.

Std 7 - Chapter - 6 Learn To Use Photoshop CS3

1.	How do you start Photoshop?
	1.      Click Start Button. 2.      Click Adobe Design Premium CS3. 3.      Click Adobe Photoshop CS3.
2.	What is the use of filters in Photoshop?
	Filters are used to give special effects to the picture or selected portion of it.  The Filter Gallery helps you to apply filters and view the thumbnail image of the change that appears which you may accept.
3.	Name the shortcut key to open layer palette.
	F7 is the shortcut key to open layer palette.
4.	Name the four categories of tools in Tools palette.
	1)      Selection Tools, 2) Path, Text and Shape Tools 3) Painting Tools 4) View Tools
5.	What is Photoshop?
	Photoshop is a software for image processing. It is widely used by professional photographers to edit, manipulate and recolour photographs and create special effects, draw objects, write text on them.
6.	What do you mean by resolution?
	Resolution means the number of pixels dots per inch.  Higher resolution pictures have sharper image but require a lot of memory space.
7.	How do you hide a layer?
	To hide a layer, click on the eye icon that is the foremost left column of the layers palette.
8.	Write the use of following tools.
	1.      Magic Wand Tool The Magic Want Tool is used to select adjacent areas of the same colour in an image. 2.      Marquee Tool The Marquee Tools are used to select any image.  Different sub selection tools of Marquee tools are Rectangular Marquee Tool, Elliptical Marquee Tool, Single Row Marquee Tool, and Single Column Marquee Tool. 3.      Crop Tool Cropping is the process of removing some part of an image and creates focus on the remaining part. 4.      Move Tool The Move Tool is used to move a selected image from one location to another.
9.	What are Retouching tools?  Write the steps to use Healing Brush Tool.
	Tools that help in editing an image are referred as the Retouching tools.  These tools can be used on the complete image or on a selected part of the image.
10.	How do you apply filter to an image?
	To apply a filter, ·         Open the image ·         Choose any category from Filter menu.  If a dialog box appears, click OK to see the effect.

Std 7 - Chapter - 5 Computer Virus

Chapter - 5

Computer Virus

1.	What are the symptoms of a computer virus?
	Symptoms of a virus include computer lockups, screen distortions, data loss, and unusual messages and reduced computer performance.
2.	What is an antivirus program?
	Antivirus programs check the files on your computer for viruses and also remove the entire virus.
3.	What is the full form of VIRUS?
	Vital Information Resources Under Seize
4.	What is a computer virus?
	Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation.
5.	Write the names of any three Antivirus software
	Norton Antivirus, Kaspersky, and McAfee
6.	What is a Boot sector virus?
	Boot sector viruses affect the boot sector area of a hard disk.
7.	Write short notes on: Worms, Trojans
	Worms: A worm is a malicious program that duplicates itself. They eventually fill up the disks space with copies of itself and thereby make a computer system to work very slowly. Trojans: These viruses at first appear to be friendly but are very malicious programs.  They steal information from the computer.
8.	Why it is necessary to scan an external device attached to your computer, before using it?  Describe the process of scanning it.
	Because external devices may contain viruses, that affects our computers. Step 1. Double Click the Kaspersky Anti-Virus. Step 2. Click Scan option Step 3: Click the Full Scan option to scan all the drives of your computer.
9.	What precautions should you take to protect your computer from a virus?
	·         Do not use a CD or pen drive received from another person unless you are certain that the disk does not contain a virus. ·         Do not download programs or other information from non-reputed sources on the Internet. ·         Restrict access to your system. ·         Install Antivirus programs on your computer.
10.	Why is it necessary to update your Anti-Virus software?
	New viruses appear often.  You must keep updating your antivirus software regularly to fight against these new viruses.
11.	What are ‘bombs’ in connection with virus?
	Bombs are viruses which activate themselves after a specific time period and cause damage to the computer system.
12.	What do you mean by a macro virus?
	Macro viruses are written in the scripting languages for Microsoft programs such as MS Word and MS Excel.  These viruses spread by Excel spreadsheets and other Microsoft Office documents.
13.	How do computer viruses attack our computers?
	·         Through an infected CD or Pen drives. ·         Through e-mail attachments. ·         Visiting malicious website and downloading infected files. ·         Starting an infected application as it infects other running applications.