CLASS VII HTML

 

chapter 9

Protecting your computer

1. d. all of these (slow processing

speed, loss of data, reduced disk

space)

2. b. Mcafee

3. b. acid rain

4. d. Both a. and b.

     (quarantining, repairing)

5. b. program virus

B. Fill in the blanks

1. Malware

2. deletes or modifies 

3. boot sector

4. program

5. ransomware

true / false

1. TRUE

2. FALSE

3. TRUE

4. TRUE

5. FALSE

SHORT ANSER QUESTIONS

1. Antivirus software is a program

that detects and removes viruses and 

other malware from the computer.

Example- Avira, AVG, Bitdefender etc.

2. Ransomware is a malware designed 

to lock a system or a network and 

deny access to them until a ransom

is paid. It spreads throughout the

system including the storage devices.

Whereas a worm is a program that 

replicates itself from one system to

another over a network. Worm does not

need a host program to run. Worms are

designed only to spread from one 

system to another without causing 

any harm to the system files.

They replicate in large numbers to 

consume disk space or system memory.

LONG

1. What do you understand by the term

malware and what are the ways in 

which it spreads?

ans- A malware is a malicious program

designed in such a way to damage 

computer files, disrupt the data 

stored in it or steal important 

information from the hard disk.

Malware spreads in the following ways-

1. By using an infected pen drive, CD

or DVD.

2. Through email attachments

3. By downloading or installing 

software/file infected with malware.

4. Clicking on any unkown link that 

has malware while surfing the internet

Q2. Write short note of the following

a. Macro virus

b. Stealth virus

c. Trojan horse

Q3. Explain three actions performed

by an antivirus software.

Ans3. Following are the common action

performed by an antivirus software

1. Quarantine- Quarantine means to 

isolate an infected file so that it 

cannot harm other files. 

2. Repair- The antivirus tries to 

remove the virus code and repairs 

the infected file to restore it to

its original form.

3. Delete- When a file is damaged or

infected beyond repair, then an 

antivirus deletes it.

Q4. Differentiate between spam and 

adware.

Ans4. Adware displays or directs the 

users to an advertisement, while 

spyware performs espionage on the

 computer`s activity.

• Adware operates visible to the user,

 while the Spyware operates hidden.

• Generally adware does not pose 

a threat to the security of the

 computer or user information, 

while spyware does and are 

categorized as malicious software.

 Q5. Differentiate between a virus

and a worm.

ANS5.(1) Worms usually spread using a

 computer network, whereas viruses 

use executable files to spread from 

one system to others.

(2) Worms can automatically replicate to 

different systems, while viruses 

require human action to replicate.

(3)The spreading speed of viruses is 

comparatively slower than worms. 

Because worms can replicate 

automatically, they spread at a much

 faster speed.

Q6. List four tips to keep your 

computer system safe from malware.

Ans6. Best practices to keep computer

safe are:-

i. Install an antivirus sofware.

ii. Scan the computer from time to 

time.

iii. Scan the pen drive or other 

external hard drives before attaching

them to the computer.

iv. Do not open emails from an 

unkonwn source. 

v. Scan a software before downloading

or installing it from the internet.

CLASS 7

INTRODUCTION TO HTML 5

A TICK THE CORRECT OPTION:-

11 D. <HR> AND <BR>

22  B <TITLE>

33 D  NOTEPAD AND WORDPAD

44 A <H1>

55 A  <B>

B. Fill in the blanks

11  Hypertext

22  Container and Empty

33  HTML 5

44  HEAD

55  BODY

 C.

11 <TITLE>

The title element is used to tell the browser that the text within <TITLE> and </TITLE> tags is the title of the webpage. The Title tag appears on the title bar of the browser.

2. <h3> The HTML <h3> tag defines the third level heading in the HTML document. This tag is also commonly referred to as the <h3> element.

 

3. <BR> The <br> HTML element produces a line break in text. It is useful for writing a poem or an address where the division of lines is significant.

4. <i> To display a part of the text in the italic form on the browser, the HTML <i> tag is used.

5. <HTML>

The html element is used to tell the browser that the document is HTML document. Every webpage code must start with <HTML> and end with </HTML>.

6.  <Img> Tag is used to insert image in a webpage. The <Img> tag is an empty element and creates space for the image to be inserted.

SHORT ANSWER QUESTIONS-

1.  The <p> element is used to mark a new paragraph. It is a container tag starting with <p> and ending with </p>.

2.  Example of container tags are

1.  Paragraph tag   <p>..</p>

2.  Italics tag  <i>…….</i>

Ans3. The line break <br> tag is used to give a line break. The text written after this tag appears on a new line. It is an empty tag.

Ans4. Hypertext refers to a word, phrase or chunk of text that can be linked to another document or text. Hypertext covers both textual hyperlinks and graphical ones

Ans5- The <!—text --> tag is used to insert comments in the HTML code. Comments help in code explanation. Comment text is not displayed in the browser. This is an empty element.

ANS6 CONTAINER AND EMPTY ELEMENT Page 106