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Describe file organisation?
A file is organized logically as a sequence of records. These records are mapped onto disk blocks.
A) Fixed-Length Records
Type deposit=record
Accountnumber:char(10);
branch name:char(22);
balance: real;
end
B) Variable length records
a) storage of multiple record types in a file
b) Record types that allow variable lengths for one or more fields
c) Record types that allow repeating fields
d) Byte string Representation
e) Fixed length representation
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
Describe the primary key functions? Primary Key : The primary key is an attribute or a set of attributes in which uniquely identify a specific example of an entity. Every entit
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
Explain the steps for reduction of E-R model into relational model. Ans:(a) Entity set in E-R model will be considered as table name in relational Model. (b) Attributes of e
Explain the Relational Completeness Codd described the term relational completeness to consider to a language that is complete with respect to first-order predicate calculus ex
What is bucket overflow and how bucket overflow is handled through Over Flow Chaining or Closed Hashing? Ans: Bucket: unit of storage holding records. Bucket is a disk block
State the Object Design for Processing The object design phase comes after analysis and system design phase. The object design phase includes implementation details like as i
multiplicity constarin
Primary Index In primary index, there is a one-to-one relationship among the entries in the index table and the records in the major table. Primary index can be of two types:
Information about films holds information about movies, stars and studios. Movies have a title, year of production, length and the film type. Stars have a name and address. Studi
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