SQL Basic Interview: Beginner-Level Quiz

SQL Basic Interview Quiz

Welcome to the "Basic SQL Interview Quiz"! This quiz is tailored to assess your foundational knowledge of SQL, the essential language for managing and querying relational databases. You'll encounter a variety of questions covering key concepts such as data retrieval, filtering, sorting, and basic functions. Whether you're preparing for an interview or simply brushing up on your skills, this quiz will help you gauge your understanding of SQL fundamentals. Let’s get started and see how well you can navigate the world of databases!

1 / 20

Which of the following is an Oracle feature?

Analytics

Management

All of the above

Security

2 / 20

With Oracle database, data is managed in an ____ manner.

Integrated

Open

Complete

All of the above

3 / 20

The Oracle ____ Application Clusters feature is not included in the Oracle Personal Edition.

Augmented

Real

None

Virtual

4 / 20

Which of the following comes under relational database?

MySQL

DB2

SQL Server

All of the above

5 / 20

Due to its ability to eliminate redundant data, ____ databases are more popular than flat files.

Relational

Analytical

Structural

None of the above

6 / 20

Prior to the invention of the database system, ____ files were extensively used to store data.

Flat

Square

Circle

Triangle

7 / 20

How does MySQL Cluster (NDB) handle data partitioning?

Automatically partitions data across all data nodes

Manually partitions data based on user settings

Only partitions data on request

Does not support data partitioning

8 / 20

How does the "max_connections" setting affect a MySQL server?

Limits the number of open transactions

Restricts query execution time

Sets the maximum number of allowable connections

Limits the number of database users

9 / 20

In MySQL, what does sharding help with?

Data recovery

Data encryption

Data archiving

Data scalability

10 / 20

How does MySQL Cluster achieve high availability?

By synchronously replicating data across nodes in real-time

By using shared storage

By periodically backing up data

By using disk mirroring

11 / 20

What does the DISTINCT keyword do in a SQL query?

Creates a distinct file

Removes duplicates from results

Orders results

Counts rows

12 / 20

What does the GROUP BY statement do in a SQL query?

Modifies data in a group

Deletes groups of data

Sorts the output

Groups data based on one or more columns

13 / 20

What is the default sort order of the ORDER BY statement in SQL?

Descending

Ascending

Fixed

Random

14 / 20

What is the main difference between CHAR and VARCHAR data types in MySQL?

CHAR is variable-length, VARCHAR is fixed-length

CHAR stores binary data, VARCHAR does not

CHAR is fixed-length, VARCHAR is variable-length

CHAR has unlimited length, VARCHAR is limited

15 / 20

What is the primary use of the ENUM data type in MySQL?

To limit input to a list of possible values

To create a queue structure

To keep log of stages

To store arrays

16 / 20

What is incorrect in the following SQL statement?
CREATE TABLE Users (ID INT, Name CHAR(20), Email VARHCAR(100));

Spelling mistake in data type for Email

Syntax is correct

Name should be TEXT

ID should be VARCHAR

17 / 20

Which SQL statement is used to remove data from a MySQL database?

Remove

Delete

Erase

Clear

18 / 20

What does DCL stand for in MySQL?

Direct Current Leakage

Degree of Combined Leverage

Doctor of Civil Law

Data Control Language

19 / 20

what does DDL stand for in MySQL?

Developmentally Delayed Learners

Data Derivation Language

Data and Database Limitation

Data Definition Language

20 / 20

What are the main components of MySQL cluster?

Database Architecture, MySQL Management, and Robust Nodes

Data Nodes, MySQL Server Nodes, and Management Nodes

MySQL Query, Data Server, and NDB Cluster

Management Nodes, MySQL Robust Data, MySQL Database Terminology

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The average score is 0%

These basic SQL interview questions focus on fundamental concepts and skills in SQL (Structured Query Language) that are commonly tested in entry-level database positions.

It also covers basic SQL commands such as SELECT, INSERT, UPDATE, and DELETE. Additionally, it covers clauses like WHERE, ORDER BY, GROUP BY, and HAVING.

It tests knowledge of foundational SQL syntax, querying, and data manipulation.

Best of luck!