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Suppose an instruction takes 1 nanosecond to execute (on average), a page fault takes 20 microseconds of processor time, and it takes 300 microseconds of disk time to read or write a single page. Suppose that on average, 1/2 of the pages are modified. What is the average number of instructions between page faults that would cause the disk to be busy doing page transfers all the time?
comparison of oracle RDBMS with MySQL
Consider an information system designed for an online company which provides IT products and services. These include desktops, laptops, networking products, IT books, parts, and te
What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types.
Define the Division Operation of Relational Algebra Let R be a relation comprising attributes (A1,...Ap,Ap+1,...An) and S comprising attributes (Ap+1,...An) DEF: Division
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
A database is a set of data. But, is the data kept in a database trustworthy? To answer that query we must first answer the question. What is integrity? Integrity simply means t
Difference between Operating System and Database Security Security within the operating system can be executed at various levels ranging from passwords for access to system, t
There are two major types of fragmentation: Horizontal& Vertical. Horizontal fragments, as the name suggests are subsets of tuples and vertical fragments are subsets of attributes
Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
tell me the functionality,advantages and disadvantages of student database
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