Can You Pass DBMS Test?

1. Is Informatica an ETL tool?

YES

NO

Informatica is indeed an ETL (Extract, Transform, Load) tool. It is widely used in the field of data integration and management. Informatica provides a comprehensive set of features and functionalities that enable users to extract data from various sources, transform it according to their business requirements, and load it into target systems. With its user-friendly interface and powerful capabilities, Informatica has become a popular choice for organizations looking to streamline their data integration processes.

Explanation

Informatica is indeed an ETL (Extract, Transform, Load) tool. It is widely used in the field of data integration and management. Informatica provides a comprehensive set of features and functionalities that enable users to extract data from various sources, transform it according to their business requirements, and load it into target systems. With its user-friendly interface and powerful capabilities, Informatica has become a popular choice for organizations looking to streamline their data integration processes.

2. What is ETL?

Extract, transform, Load

Extract, transact Load

Export, transform, load

ETL stands for Extract, Transform, Load. This process is commonly used in data integration and data warehousing. Firstly, data is extracted from various sources, such as databases or files. Then, the extracted data is transformed to meet the desired format or structure, which may include cleaning, filtering, or aggregating the data. Finally, the transformed data is loaded into the target system, such as a data warehouse or a database. This allows organizations to consolidate and analyze data from multiple sources in a unified and meaningful way.

Explanation

ETL stands for Extract, Transform, Load. This process is commonly used in data integration and data warehousing. Firstly, data is extracted from various sources, such as databases or files. Then, the extracted data is transformed to meet the desired format or structure, which may include cleaning, filtering, or aggregating the data. Finally, the transformed data is loaded into the target system, such as a data warehouse or a database. This allows organizations to consolidate and analyze data from multiple sources in a unified and meaningful way.

3. What is the command that is used to modify a column in the table?

Alter

Update

Set

Create

The correct answer is "Alter". The Alter command is used to modify a column in a table. It allows you to add, delete, or modify columns in an existing table. This command is commonly used in database management systems to make changes to the structure of a table without having to recreate it.

Explanation

The correct answer is "Alter". The Alter command is used to modify a column in a table. It allows you to add, delete, or modify columns in an existing table. This command is commonly used in database management systems to make changes to the structure of a table without having to recreate it.

4. DBMS helps achieve

Data independence

Centralized control of data

Neither A nor B

Both A and B

DBMS (Database Management System) helps achieve both data independence and centralized control of data. Data independence refers to the ability to make changes to the database structure without affecting the applications that use it. This allows for flexibility and easier maintenance. Centralized control of data means that the DBMS provides a centralized location for managing and controlling access to the data, ensuring data integrity and security. By achieving both data independence and centralized control of data, DBMS provides a powerful tool for managing and organizing large amounts of data efficiently.

Explanation

DBMS (Database Management System) helps achieve both data independence and centralized control of data. Data independence refers to the ability to make changes to the database structure without affecting the applications that use it. This allows for flexibility and easier maintenance. Centralized control of data means that the DBMS provides a centralized location for managing and controlling access to the data, ensuring data integrity and security. By achieving both data independence and centralized control of data, DBMS provides a powerful tool for managing and organizing large amounts of data efficiently.

5. Key to represent relationship is called?

Primary Key

Secondary key

Foreign Key

None of the above

A foreign key is used to establish a relationship between two tables in a database. It is a column or a combination of columns in one table that references the primary key in another table. This relationship ensures data integrity and allows for the establishment of connections between related data in different tables. Therefore, the correct answer is "Foreign Key."

Explanation

A foreign key is used to establish a relationship between two tables in a database. It is a column or a combination of columns in one table that references the primary key in another table. This relationship ensures data integrity and allows for the establishment of connections between related data in different tables. Therefore, the correct answer is "Foreign Key."