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!
Describe the storage structure of indexed sequential files and their access method.
Ans: Storage structure of Indexed Sequential files and their access: To achieve fast random access to records in a file, we can utilize an index structure. An index record contains a search key value and pointers to data records that is related with a specific search key. An ordered index stores the values of the search keys in sorted order. A file may have various indices on different search keys. If the files consisting of the records are sequentially ordered, a primary index is an index whose search key also describes the sequential order of the file. Such types of files are termed as index sequential files. There are two sorts of ordered indices: dense and sparse. In dense index, and index record appears only for a few of the search-key in the files as displayed below.
To access a specific record with search key value, K, by using dense index we search index record along with search key value, K, by which reach the first entry of data record along with search key value K. After that the data records are searched linearly to acquire the required record. If either the index record is not there or the linear search arrive the data record with different search key value, then the record is not there. Here now for sparse index, we search index record along with search key value, K or the index record with highest search key value less as compared to K, from which arrives the first entry of data record with search key value K or highest value less than K. After that the data records are searched linearly to acquire the required record. If the linear searches the data record with search key value greater as compared to K, then the record is not there.
What is the role of a database administrator?
System error :These contain errors in database system or the OS, example, deadlocks.Such errors are fairly hard to detect and need reprogramming the erroneous components of the sys
Product adder required for Ecommerce website Project Description: Want a product adder for 500 products I have a magento website and need products pulled from site A to my si
MySQL Database Merge Project Description: I have two databases, I need merge the data of one database into another Work to be done online right now. Payment can be done
A Data Model in software engineering is an abstract model that organizes and documents the business data for interaction between team members and is used as a plan for creating
Explain the difference between using functions along with and without grouping attributes in relational algebra. Give examples. Ans: Group functions are used to group data of
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
Q. With the help of a suitable diagram gives module wise explanation of system architecture of DBMS. Sol. A Database management is a collection of interrelated data and col
What is a shadow copy scheme? It is simple, but efficient, scheme known as the shadow copy schemes. It is based on making copies of the database called shadow copies that singl
How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd