The Ultimate Database Programming Quiz for Experts
The Ultimate Database Programming Quiz for Experts
Quizzee Rascal
Created 6/20/2024
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Think you're an expert in database programming? Put your knowledge to the test with this ultimate quiz and find out how many correct answers you can get out of 20!
1. Which of the following SQL commands is used to remove a record from a database?
UPDATE
DELETE
REMOVE
DROP
2. In relational database design, what does the acronym ACID stand for?
Atomicity, Consistency, Isolation, Durability
Automatic, Consistent, Independent, Dependable
Atomic, Consistent, Independent, Durable
Automation, Control, Integrity, Durability
3. Which of the following is NOT a NoSQL database?
MongoDB
Cassandra
MySQL
Redis
4. What is a primary key in a database?
A unique identifier for a record in a table
A key used to unlock the database
A key used to index an entire table
A main accessing point for database credentials
5. Which of the following is a widely-used open-source SQL database?
Oracle
DB2
Microsoft SQL Server
PostgreSQL
6. What does the SQL command 'JOIN' do?
Merges two tables into one
Creates a new table
Retrieves data from multiple tables
Deletes data from multiple tables
7. What type of join returns all records when there is a match in either left or right table?
INNER JOIN
LEFT JOIN
RIGHT JOIN
FULL OUTER JOIN
8. Which of the following is an aggregate function in SQL?
COUNT
WHILE
JOIN
TRUNCATE
9. Which index type allows for more efficient query performance but does not enforce uniqueness?
Primary Key Index
Unique Index
Non-Unique Index
Clustered Index
10. In a database transaction, which statement is used to permanently save all changes performed in the transaction?
SAVE
SUBMIT
COMMIT
FINALIZE
11. What is the main difference between OLTP and OLAP systems?
Speed and efficiency
Storage capacity
Transaction processing vs. analytical processing
Data security
12. In the context of SQL, what does 'DDL' stand for?
Data Decision Language
Database Departure Language
Data Definition Language
Data Description Language
13. Which of the following statements is used to add a new row to a table in SQL?
APPEND
INSERT INTO
NEW ENTRY
ADD ROW
14. What does the SQL keyword 'HAVING' do?
Filters records before aggregation
Filters groups after aggregation
Creates a temporary table
Renames a column in the results
15. Which command is used to remove a table from a database in SQL?
REMOVE TABLE
CUT TABLE
DROP TABLE
DELETE TABLE
16. In database indexing, what is a 'B-Tree' primarily used for?
Storing binary data
Indexing data for fast retrieval
Storing documents in a hierarchical structure
Reducing database size
17. Which of the following is a key-value store database?
Oracle
Redis
PostgreSQL
MongoDB
18. What does 'SQL injection' refer to?
Adding extra SQL clauses for optimization
A code injection technique that exploits vulnerabilities in SQL queries
Enhancing SQL performance
Injecting data to initialize a database
19. Which normal form is a relation in if it is free of all types of transitive dependencies?
First Normal Form
Second Normal Form
Third Normal Form
Boyce-Codd Normal Form
20. Which command in SQL is used to change the structure of an existing table?
