1.2. Number of attributes in a relation are called its degree.
2.3 SELECT FIRST NAME, LASTNAME, SALARY+BENEFITS "TOTAL SALARY" FROM EMPLOYEES E, EMPSALARY ES WHERE E.EMPID = ES.EMPID AND DESIGNATION = 'Manager';
2.8 The question is wrong as there is no BENEFITS attribute in EMPLOYEES TABLE. And students who mentioned and corrected the error and gave output have been awarded with marks.
6. Y'Z'
7. Message Switching: Each message is treated as a separate entity. Each message contains addressing information, and at each switch this information is read and the transfer path to the next switch is decided. (wikipedia)
Packet Switching: Packet switching is a digital networking communications method that groups all transmitted data – regardless of content, type, or structure – into suitably sized blocks, called packets. (wikipedia)
9. Two applications of Cyber Laws are: 1. Digital Transactions, 2. Activities on Internet.
10.3 If you put HUB on every wing, you don't need any repeater. And if you put repeater then no HUB is needed.
10.4 Dial Up or Broadband(DSL) Internet Connection.
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