Answer:
a, duplicate the object.
Explanation:
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Answer:
First we understand what is hash function.A hash function is mostly used in Hashmaps. It maps different keys to a set of values.There may occur a case when we have same key but different values.This case is called collision.So we have to use different collision handling techniques that are open addressing and separate chaining.
A perfect hash function maps key-value pair such that there are no collisions.
Answer is given below
Explanation:
differences between a file-processing system and a database management system is given below
file-processing system
- File system is a software that manages and organizes the files in a storage medium within a computer.
- It doesn’t provide backup and recovery of data if it is lost.
- There is less data consistency in file system.
- File systems provide less security in comparison to DBMS.
- It is less complex as compared to DBMS.
database management system
- DBMS is a software for managing the database
- It provides backup and recovery of data even if it is lost.
- DBMS has more security mechanisms as compared to file system
- It has more complexity in handling as compared to file system.
- There is more data consistency because of the process of normalization.
Answer:
Database Management System.
Explanation:
Database Management System is the collection of programs and data used to create ,define and manipulate the database.
There are several database management systems present and some of them are as following:-
- RDBMS (Relational Database Management System)
- No SQL DBMS
- CDBMS(Columnar Database Management System).
- IMDBMS(In-Memory Database Management System).
