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What is an index?
An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
Define average latency time. The average latency time of the disk is one-half the time for a full rotation of the disk.
Define hot swapping? Hot swapping permits the removal of faulty disks and changes it by new ones without turning power off. Hot swapping decreases the mean time to repair.
need a DBMS system on any data for assignment.
Explain Superkey Ans: A superkey is described in the relational model of database organization like a set of attributes of a relation variable for which it holds that in all re
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
Determine the concept of Process Process: A process transforms the data values. It is represented as ellipse containing a description of transformation. Each procedure has a
Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.
Briefly describe the different kinds of users of a DBMS. Ans: Different sorts of DBMS users are: (a) Software Engineers: These are the people accountable for developing ap
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