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Enroll a student identified by her snum into the class named 'Introduction to Database Systems' is the following transactions, state the SQL isolation level you would use.
1. Enroll a student identified by her snum into the class named 'Introduction to Database Systems'.
<u>Explanation:</u>
Since enroll is unique in the university enrollment database schema and field name is SNUM and it is data type is an integer. To identify student class name and department name and name of student SNUM field is used for searching in university enrollment database schema. Enrollment changing is not possible of the student’s not possible or not good practices in university enrollment database schema.
If a query had been made class wise or department wise enrollment is played an important role.
For assign, a faculty is made on the class id or department id.
Answer: d)Phishing
Explanation: Phishing is the activity that is used by the attackers or unauthorized parties to steal confidential information of individuals through emails, messages or calls.This activity is considered as cyber-crime as the unauthorized source present themselves as the legal and actual party to gain private information such as credit card details, personal details , etc.
The example mentioned in the question about eBay's security issue is also related with phishing where the fraud mails are sent to the users to gain or steal their personal information.
Other options are incorrect because insider is a threat that happens in the organization or business field regarding the organizational data,dumpster diving is reviving data to execute an attack on operating system and social engineering is gaining personal information from an individual through manipulation .Thus, the correct option is option(d).
Phishing is a cybercrime in which a target or targets are contacted by email, telephone or text message by someone posing as a legitimate institution to lure individuals into providing sensitive data such as personally identifiable information, banking and credit card details, and passwords.
A proxy server
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