Can You Pass DBMS Test?

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| By Divya.bidw

Divya.bidw

Community Contributor

Quizzes Created: 1 | Total Attempts: 284

Questions: 5 | Attempts: 284 | Updated: Nov 16, 2023

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Can you pass the DBMS test? This system makes it easier for users of computer information to retrieve, store, and update data in a database at any given time. Every company desires a DBMS that functions correctly, and the quiz below will test out how conversant you are with it. Do give it a try and keep reading up on it!

Questions and Answers

1.

What is the command that is used to modify a column in the table?
- A.
  
  Alter
- B.
  
  Update
- C.
  
  Set
- D.
  
  Create
Correct Answer
A. Alter

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.

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2
0
2.

What is ETL?
- A.
  
  Extract, transform, Load
- B.
  
  Extract, transact Load
- C.
  
  Export, transform, load
Correct Answer
A. Extract, transform, Load

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.

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1
0
3.

Is Informatica an ETL tool?
- A.
  
  YES
- B.
  
  NO
Correct Answer
A. YES

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.

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4.

DBMS helps achieve
- A.
  
  Data independence
- B.
  
  Centralized control of data
- C.
  
  Neither A nor B
- D.
  
  Both A and B
Correct Answer
D. Both A and B

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.

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5.

Key to represent relationship is called?
- A.
  
  Primary Key
- B.
  
  Secondary key
- C.
  
  Foreign Key
- D.
  
  None of the above
Correct Answer
C. 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."

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Current Version
Nov 16, 2023

Quiz Edited by
ProProfs Editorial Team
May 28, 2009

Quiz Created by
Divya.bidw

Can You Pass DBMS Test?

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

What is ETL?

Is Informatica an ETL tool?

DBMS helps achieve

Key to represent relationship is called?