10+ NOVO Medisciences Interview Questions and Answers

DBMS is a software system that manages databases, while RDBMS is a type of DBMS that uses a relational model.

• DBMS stands for Database Management System, which is a software system that manages databases.

• RDBMS stands for Relational Database Management System, which is a type of DBMS that uses a relational model.

• DBMS can manage any type of database, while RDBMS manages only relational databases.

• DBMS does not enforce any specific data model, while RDBMS enforces the relational d...read more

SQL is a language used to manage relational databases, while PL/SQL is a procedural language used to enhance SQL functionality.

• SQL is used to create, modify, and query databases

• PL/SQL is used to create stored procedures, functions, and triggers

• SQL is a declarative language, while PL/SQL is a procedural language

• SQL is used to manipulate data, while PL/SQL is used to manipulate the behavior of SQL

• SQL is used in various database management systems, while PL/SQL is specific to Or...read more

Data is information that is stored and organized in a structured or unstructured format.

• Data refers to facts, statistics, or information that can be processed or analyzed.

• It can be in the form of numbers, text, images, audio, video, etc.

• Data can be stored in databases, spreadsheets, files, or any other storage medium.

• Examples of data include customer names, product prices, sales figures, medical records, etc.

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Normalization involves breaking down a table into smaller tables and defining relationships between them.

• There are different levels of normalization, including first normal form (1NF), second normal form (2NF), and third normal form (3NF).

• 1NF involves ensuring that each column in a table contains atomic values, while 2NF involves removing partial dependencies and 3NF ...read more

A database is a structured collection of data that is organized and stored for easy access, management, and retrieval.

• A database is a software system that manages and stores data.

• It provides a way to organize and structure data in a logical manner.

• Data in a database is typically stored in tables, which consist of rows and columns.

• Databases allow for efficient storage, retrieval, and manipulation of data.

• Examples of databases include MySQL, Oracle, and MongoDB.

Metadata is data that describes other data.

• Metadata provides information about the structure, content, and context of data.

• It can include information such as data type, format, source, and ownership.

• Examples of metadata include file properties, database schema, and website tags.

• Metadata is used by applications to manage and organize data.

• It is also used for data analysis, search engine optimization, and digital preservation.

Types of backup include full, incremental, differential, and snapshot.

• Full backup: backs up all data in a database

• Incremental backup: backs up only the changes made since the last backup

• Differential backup: backs up only the changes made since the last full backup

• Snapshot backup: creates a point-in-time copy of the database

Joins in Oracle are used to combine rows from two or more tables based on a related column between them.

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Joins are specified in the WHERE clause using the JOIN keyword

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

A trigger is a set of instructions that automatically execute when a certain event occurs in a database.

• Triggers are used to maintain data integrity and automate tasks in a database.

• They can be set to execute before or after an INSERT, UPDATE, or DELETE operation.

• Examples of triggers include auditing changes to a table or enforcing business rules.