Describe the two-phase locking protocol? describe strict, Ask an Expert

Programming

Q1. Describe Domain Integrity Constraint, Key Integrity Constraint, Entity Integrity Constraint and the Referential Integrity Constraint.

Q2. Design a generalization-specialization hierarchy for the motor-vehicle sales company. The company sells motorcycles, vans, passenger cars and buses. Validate your placement of attributes at every level of hierarchy. Describe why they must not be placed at a higher or lower level?

Q3. Distinguish between the given:

a) Simple (Atomic) and Composite Attributes.
b) Single-valued and multi-valued attributes.
c) Stored and Derived Attributes.

Q4. Describe the two-phase locking protocol? Describe strict and conservative two-phase locking protocol? Which of them is favored and describe why?

Q5. Describe why during system recovery from crash; the log records for transactions on the undo list should be processed in the backward direction and log records for transactions on redo list are processed in forward direction.

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DBMS, Programming

Category:- DBMS
Reference No.:- M911725

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