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What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
Define According to the levels of abstraction, the schema at the intermediate level is called Ans: As per to the levels of abstraction, the schema at the intermediate level is
data models are being replaced over years. Reasons and why does that happen?
What is object containment? References among objects can be used to model dissimilar real-world concepts.
Using the concepts defined previous, we have identified that strong entities in COLLEGE database are FACULTY, STUDENT, COURSE and DEPARTMENT. This database also has one weak entity
what is the relationship between receipt and owner entities in computer sales and service company
Many-to-many : Entities in A and B are related with any number of entities from each other. Example: Taught_by Relationship among course and faculty. One faculty member ca
Most computer systems authenticate users by asking them for the user name and password. However, the user names and passwords often can be guessed by hackers. Suggest an automated,
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
Consider a systems development project with the following data Activity Duration (weeks) Precedence Relationship 1. Software design
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