Test: Database Management System - 2 - Bank Exams MCQ

The "select" command is typically used to retrieve data from the database management system. As a result, when the application programmes request data from the database management system, they do it using the Data Manipulation Language.

The generalisation makes use of the bottom-up methodology. A single higher-level entity is created by combining the several lower-level sub-entities. We may sum it up by saying that it is the exact opposite of specialisation.

The database structure is often defined or maintained using the Data Definition Language. Creating, deleting, and altering tables are a few examples. In a nutshell, we can say that the database table schemas are worked on using data definition languages.

Every time we have related data, information, or records, we gather them together, combine them, store them in a single location, and give the collection a name that is known as a file.

A data warehouse is a sizable collection of various sorts of data/information gathered from numerous sources and kept in one location. It functions exactly like a regular warehouse, which is typically a holding area or facility used to store numerous various types of items until they are disseminated further. Data Warehouse is the appropriate response.

A type of system software called a DBMS, or database management system, is used for many tasks like building tables and databases, storing data, and administering databases. Additionally, it enables editing of the database's data.

The phrase "DDL" stands for Data Definition Language, which is utilised to carry out all other crucial functions, such erasing associated schemas and relational relationships when constructing a structural relation.

The oldest database model is the hierarchical database. It was developed by IBM in 1968 and organizes data in a tree-like structure. The hierarchical database was the first one developed and was commonly used in the first mainframe database management systems.

The message is encrypted using the encryption key. Even if an enemy intercepts the message, he won't be able to decrypt it and understand what it means because he doesn't have the key.

Each component of your dataset and data model is given a thorough definition in a data dictionary. The documentation of significant and practical information, such as a descriptive name, the data type, permitted values, units, and text description, is done using data dictionaries.