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Question:
(a) Describe fully with example the two access control methods available to implement database security.
(b) Discuss why database statistics (meta data) provide essential information for query optimization. Give four examples of typical statistics which are maintained by a database system.
(c) Discuss why query optimization is important in database systems in terms of its role in enhancing the system performance. Your answer should include descriptions of various stages involved in the optimization process.
Question 1 The speech act theory is used as the model for communication among computational agents. Locution, illocution, and perlocution are the 3 aspects of this theory Using
What key which if used to encrypt the ciphertext again would give back the plaintext (i.e. key is a weak key)? Define a formula for identifying weak keys for the cipher below (
You are designing a Demilitarized zone for a large corporation. Using design best practice, and the information that you have learned so far, propose a design that will provide the
INFORMATION CLASSIFICATION The classification of information is an important aspect of policy and a control for the information protection. A clean desk policy stipulates that a
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QUESTION: (a) Ethernet has grown in popularity in the recent years and is now used in LANs. Give three reasons for the success behind Ethernet. (b) Ethernet uses the CSMA/CD
WFABilling project in Java: Project Title: WFABilling Role : Developer Domain : Tele-Com Environment : Java, J2EE, S
on LAN,where are IP datagrams transported?
Describe the process a proposed standard goes through to become an RFC
briefly expslain type of e-commerce
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