The TNF describes the tabular format in which
Correct answer: D. All of the above
- A. All the key attributes are defined
- B. No repeating groups in the table
- C. All attributes are dependent on the primary key
- D. All of the above
Explanation
First Normal Form (1NF) is a fundamental concept in database normalization. A table is considered to be in 1NF if it adheres to all three of the following conditions:All the key attributes are defined: Each record (row) in the table must have a unique identifier, which can be a single key or a composite key consisting of multiple attributes.No repeating groups in the table: There should not be any lists or multiple values stored within a single cell in the table. Each cell should contain a single atomic value.All attributes are dependent on the primary key: Every non-key attribute (column) in the table should be fully dependent on the primary key. This means the value of a non-key attribute can be uniquely determined by the value of the primary key.In essence, 1NF lays the groundwork for a well-organized and efficient database structure by eliminating data redundancy and ensuring data consistency. By satisfying all the conditions mentioned in options (A), (B), and (C), a table achieves the 1NF form
Last updated
About Databases
Databases cover tables, records, fields, keys and relationships, together with database management systems and relational database design. The subject includes primary and foreign keys, normalization, SQL commands such as SELECT, INSERT, UPDATE and DELETE, queries, forms and reports, while distinguishing a database from a spreadsheet used for simple tabular data.
Practise Databases
210 free Databases MCQs from Computer Science and IT, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Computer Science and IT questions like this
Computer Science and IT is on 40 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A category of data or information that describes an entity is called
A collection of data that include name, address, phone number etc, of a person:
A collection of raw facts and figures is called:
A constraint between two attributes is called a(n)
A database containing all student in a class would store Roll no of student in: