Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Differentiate between static hashing and dynamic hashing.
Ans: Static Hashing comprises the number of primary pages in the directory fixed. So, while a bucket is full, we require an overflow bucket to store any extra records that hash to the full bucket. This can be completed with a link to an overflow page, or a linked list of overflow pages. The linked list can be separate for every bucket, or similar for all buckets that overflow. While searching for a record, the original bucket is accessed first, after that the overflow buckets. Specified there are several keys that hash to the same bucket, locating a record may need accessing multiple pages on disk that greatly degrades performance.
The dilemma of lengthy searching of overflow buckets is solved by Dynamic Hashing. In Dynamic Hashing the size of the directory grows along with the number of collisions to accommodate new records and prevent long overflow page chains. Extendible and Linear Hashing are two dynamic hashing methods.
Relations create the database. They must satisfy various properties, like no duplicate tuples, no ordering of tuples, and atomic attributes, etc. Relations that satisfy these basic
The dataset " CFOLYMPICS.XLS " contains the observations used in the above article. The definitions of the variables are also included in this spreadsheet. However, for the purpo
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
Define the terms i) DDL ii) DML DDL: Data base schema is particular by a set of definitions expressed by a special language known as a data definition language. DML: A data
Why does a DBMS query language is designed? A DBMS query language is designed to support end users who use English-like commands. support in the development of complex applicat
Concurrency Identification While designing analysis, model we map real world model into our analytical model. Real life objects are simultaneous in nature, but all the design
What is known as sequential file organization? In the sequential file organization, the records are kept in sequential order, according to the value of a "search key" of every
What functions does a data dictionary perform? In a (DBMS)data management system, the principal functions performed by the data dictionary are Management of data defini
What are the categories of SQL command? SQL commands are separated in to the following categories: 1. Data - Definitition Language 2. Data Manipulation language 3. Dat
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd