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What is serialization? Where it is used and why?
Serialization is a basic term used for mechanisms which enable objects and object structures to be converted into portable form, removing volatility created by the object addresses. Serialization provides the convenient and straightforward way of making the data persistent. It is mainly appropriate when amount of data involved is relatively small. If larger amounts of data have to be stored, serialization might no longer be appropriate.
Explain the disadvantages of file oriented approach? In the oriented approach Applications are designed in isolation. Design of application is optimized for one application. In
Software failures : In such cases, a software error abruptly stops the implementation of the current transaction (or all transactions), therefore leading to losing the state of pr
What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types.
Consider the following relational scheme: R (a,b,c,d,e,f) and its corresponding set of FDs {d→ a, be → c, ac → e, b → f, f → d, a → c}. a. Is the following decomposition i) non
What is the meaning of Data independence? Data independence means a programs that are not dependent on the physical attributes of data and a programs that are not dependent on
What is a foreign key, and what is it used for? A foreign key is used to establish relationships between relations in the relational model. Technically, a foreign key is a colu
Determine the language that needs a user to specify the data to be retrieved with no specifying exactly how to get it is Ans: Non-Procedural DML
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
Multilevel Index The Multilevel Index is a modification of the secondary level index system. In this system we might be use even more number of levels in case the table is eve
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
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