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!
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 or contiguous block .Bucket contains multiple records.
Hash Function: maps records to bucket numbers Function h from set of all search key values K to the set of all bucket addresses (numbers) B .Records along with different search key values may be mapped similar bucket. Whole bucket has to be searched to locate record. If bucket is full required overflow buckets and pointers
How to handle bucket overflow:
• Buckets overflow is handled through using overflow buckets1. Closed Hashing (Chaining): The overflow buckets of a given bucket are chained together in a linked list2. Open Hashing: place in further available bucket (not suitable for database applications)3. Multiple Hashing : use a second hash function
Consider the relations EMPLOYEE(emp#, name) ASSIGNED_TO(project#, emp#) PROJECT(project#, project_name, chief) Express the subsequent queries in Relational Algebra (i) Ge
Mention the type of constraints we can specify in the CREATE command of DDL. The type of constraints that can be specified are as follows:- PRIMARY KEY, NOT NULL, UNIQUE, FOR
What are views? Explain how views are different from tables? A view in SQL terminology is a one table in which is derived from other tables. These other tables could be base t
How to reduce data redundency
We face problem of stock Opening balance and closing balance in Minus
Drawbacks of Data Distribution: The primary drawbacks of distributed database systems are the added complexity needed to ensure proper coordination between the sites. This increas
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
What is multiplicity in the associations? Give an example to explain multiplicity? Multiplicity in association indicate number of objects participate in any relationship. For
Define the Two Phase Locking Protocol This is a protocol that is used to make sure serializability of transactions. This protocol needs that every transaction issue lock and u
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