Answer:
David L. Smith
Explanation:
Around March 26, 1999, the Melissa virus was released by David L. Smith
‘Melissa.A’ used social engineering techniques, since it came with the message “Here is the document you asked me for… do not show it to anyone”. In just a few days, she starred in one of the most important cases of massive infection in history, causing damage of more than 80 million dollars to American companies. Companies like Microsoft, Intel and Lucent Technologies had to block their Internet connections due to its action.
How it Works
When opening a document infected with the ‘Melissa.A’, the virus creates an e-mail with the following features:
Subject: Important Message From “sender name”
Text: Here is that document you asked for … do not show anyone else
Attachments: a file with a DOC.
The recipients of this message were the first 50 addresses ‘Melissa.A’ found in the address book in Outlook. This was the first macro virus that used this technique, until this moment there hadn’t been a virus that affected users by sending a Word document within an email.
What Happened
The creator of ‘Melissa.A’, David L. Smith, pleaded guilty but said he did not expect such high economic damage. This malware was created in memory of a topless dancer in Florida with whom he had fallen in love with.
Smith was sentenced to 10 years in prison.
Answer:
spelling and good format
Explanation:thats all i know
I do believe the answer is c. I used to own a computer with a windows 7 program.
Answer:
Lexical rules that are defined in case of regular grammar are simple and the notation is quite easy to understand.
Regular expression are useful for defining constructs of identifiers or constants. e.g. a|b etc.
In the case of context-free, grammar is not simple and deals with the productions.
Context-free are useful in describing the nested constructs like if-else etc which are not defined by regular expressions.
These produce a higher level of reliability as it provides a medium for generating syntactical as well as semantic data. The grammar is context-free is a little complex.
Explanation:
Answer:
Following are the program in the Python Programming Language:
def check(num): #define function
if(num.isdigit()): #set if statement
return "yes"; #return yes if condition is true
else:
return "no";# return no if condition is false
string=input("Enter the numbers 0-9: ") #get input from the user
print(check(string)) #print and call the function
Output:
Enter the numbers 0-9: 1995
yes
Enter the numbers 0-9: 42,000
no
Explanation:
Here, we define a function "check()" and pass an argument in its parameter "num" inside the function.
- we set if-else conditional statement and check the value stored in the variable "num" is the digit by using built in function "isdigit()" then return "yes".
- Then, otherwise it return "no".
Finally, we get the input from the user in the variable "string" then, we call the function through "print()" function.
