Answer:NULL Scan
Explanation:RFC 793(Request for comments) is a type of RFC command labeled with the number 793 which can operate with the TCP protocol.They are sort of document form which is from IETF( Internet Engineering Task Force ).
The null scan is scanning protocol used by legal as well as illegal hackers for working in the transfer control protocol architecture. It is used for the identification of the the ports and holes in TCP servers.they can also have the negative impact if used by the illegal hackers.
Answer:
Hacker
Explanation:
Hacker -
It refers to the computer software expert , who is responsible to break into the unauthorized networks or computer , is referred to as a hacker .
The hacker is skilled with exceptional computer and computer software knowledge .
Hacking is an illegal practice , as the person is able to access some confidential and personal data and information of any other person or organisation .
Hence , from the given information of the question ,
The correct term is hacker .
I think it’s 4
a process or set of rules to be followed in calculations or other problem-solving operations, especially by a computer.
Answer:
A good identifier for a variable that will be used to hold an employee’s phone number is:
a. EmployeePhoneNumber
Explanation:
An identifier is a string that uniquely identifies or names the entity or an object. The object or entity may be a constant, variable, structure, function, etc. Identifiers can be formed from uppercase and lowercase letters, digits, and underscores. Meaningful identifiers mostly favor the use of long descriptive names like EmployeePhoneNumber. However, the other options can still be used.
Answer:
The answer is "Option 4"
Explanation:
In the given question line 4 is incorrect because it uses the select command, which selects "pubid and cost" that is already defined inline 3. This statement selects one or more a collection of records from the tables. It also recovers more row across any table that server and correct choices can be described as follows:
- In the given choices, except line 3 all were correct because first, it selects column names from the table "book".
- After selecting column names it and defines condition were pubid value is 3.
