Databases Medium-Level Quiz 5 > Data AI Revolution

Databases Medium-Level Quiz 5

This quiz consists of multiple-choice questions, each designed to challenge your knowledge and enhance your understanding of database systems. It is suitable for students in database management courses, database administrators, or anyone looking to solidify their database knowledge.

1 / 10

What is the purpose of an index in a database?

To enforce data integrity

To improve query performance

To increase data redundancy

To create a backup of data

2 / 10

What does ACID stand for in the context of databases?

Atomicity, Consistency, Isolation, Durability

Accuracy, Consistency, Integrity, Durability

Atomicity, Concurrency, Isolation, Database

None of the above

3 / 10

What is a composite key?

A key made up of multiple columns

A key that is made up of a single column

A foreign key that references multiple tables

None of the above

4 / 10

Which of the following is an aggregate function in SQL?

COUNT

MAX

AVG

All of the above

5 / 10

Which SQL function is used to count the number of rows in a table?

COUNT()

SUM()

TOTAL()

NUM()

6 / 10

What is a view in SQL?

A virtual table based on the result set of an SQL statement

A physical table in the database

A backup of a table

A synonym for a table

7 / 10

Which of the following commands is used to create a new table in a database?

CREATE

NEW

MAKE

INSERT

8 / 10

Which of the following is true about foreign keys?

They can be null

They must be unique

They are used to enforce relationships between tables

Both A and C

9 / 10

In SQL, what is a stored procedure?

A query that retrieves data

A precompiled collection of SQL statements

A way to index data

A function that is executed on a trigger

10 / 10

What is the default sorting order of the ORDER BY clause in SQL?

Descending

Ascending

Random

None of the above

Your score is

The average score is 40%

0%

Databases Medium-Level Quiz 5

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