Why the relational model dominates databases in DBMS Theory - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main feature of the relational model.

DBMS Theory

The relational model organizes data into [1].

Drag options to blanks, or click blank then click option'

Afiles

Bgraphs

Cdocuments

Dtables

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing graphs or documents instead of tables.

The relational model organizes data into tables, which are easy to understand and use.

2fill in blank

medium

Complete the code to explain why the relational model is popular.

DBMS Theory

One reason the relational model dominates is because it supports [1] queries.

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Amanual

Bsimple

Ccomplex

Drandom

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing simple or manual, which do not capture the power of the model.

The relational model supports complex queries, allowing users to retrieve and manipulate data efficiently.

3fill in blank

hard

Fix the error in the statement about data integrity.

DBMS Theory

The relational model ensures data [1] through rules called constraints.

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Aredundancy

Bintegrity

Closs

Dduplication

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing integrity with redundancy or duplication.

Data integrity means the data is accurate and consistent, which the relational model enforces using constraints.

4fill in blank

hard

Fill both blanks to describe a key advantage of the relational model.

DBMS Theory

The relational model uses [1] to uniquely identify records and [2] to link tables.

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Aprimary keys

Bforeign keys

Cindexes

Dschemas

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up primary and foreign keys or choosing unrelated terms.

Primary keys uniquely identify each record, while foreign keys link tables together, enabling relationships.

5fill in blank

hard

Fill all three blanks to explain why the relational model is widely used.

DBMS Theory

It offers [1] data storage, [2] access through SQL, and [3] data consistency.

Drag options to blanks, or click blank then click option'

Astructured

Beasy

Cstrong

Dunstructured

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing unstructured instead of structured or confusing access and consistency.

The relational model provides structured data storage, easy access via SQL, and strong data consistency, making it popular.