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Describe a technique for direct search? Explain how data is stored within a file so which direct searching can be performed.
For a file of unordered fixed length records by using unspanned blocks and contiguous allocation, it is straight forward to access any record through its position in the file. If the file records are numbered 0,1,2,---,r-1 and the records in every block are numbered 0,1,---bfr-1; whereas bfr is the blocking factor, then ith record of the file is situated in block [(i/bfr)] and is the (I mod bfr) record in that block. Such a file is frequent known as a relative or direct file because records can simply be accessed directly through their relative positions. Accessing a record based on a search condition; thus, it facilitates the construction of access paths on the file, like as the indexes.
Views A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT stat
The technique of converting the state diagram to code a) Identify all major control paths. Start from initial state; choose a path across the diagram that corresponds to normal
What are the states of transaction? The states of transaction are:- a) Active b) Partially committed c) Failed d) Aborted e )Committed f) Terminated
What is OOM? Object oriented modeling is an approach by which modeling of systems is done by visualizing the system based on real world concepts. Object oriented modeling does
Describe Participation Constraints? Participation Constraints - The participation constraint exacts whether the existence of an entity depends on its being related to another
What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
ADVANCE OBJECT DESIGN Introduction Analysis is the initial step of the OMT methodology. It is apprehensive with devising a precise, concise, correct and understandable mo
Identify the need and use of data control through problem solving, illustration
atient(PNumber, Name, NHS_no, Amount_due, DNO, Doctor, Medical_Treatment), relation of schema Staff(StaffNum, Name, DNO, Task) and relation of schema Dept(DNO, Name, Location, Dire
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
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