The Ultimate Database Programming Quiz for Experts

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!

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All 20 questions

Which of the following SQL commands is used to remove a record from a database?UPDATE · DELETE · REMOVE · DROP
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
Which of the following is NOT a NoSQL database?MongoDB · Cassandra · MySQL · Redis
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
Which of the following is a widely-used open-source SQL database?Oracle · DB2 · Microsoft SQL Server · PostgreSQL
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
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
Which of the following is an aggregate function in SQL?COUNT · WHILE · JOIN · TRUNCATE
Which index type allows for more efficient query performance but does not enforce uniqueness?Primary Key Index · Unique Index · Non-Unique Index · Clustered Index
In a database transaction, which statement is used to permanently save all changes performed in the transaction?SAVE · SUBMIT · COMMIT · FINALIZE
What is the main difference between OLTP and OLAP systems?Speed and efficiency · Storage capacity · Transaction processing vs. analytical processing · Data security
In the context of SQL, what does 'DDL' stand for?Data Decision Language · Database Departure Language · Data Definition Language · Data Description Language
Which of the following statements is used to add a new row to a table in SQL?APPEND · INSERT INTO · NEW ENTRY · ADD ROW
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
Which command is used to remove a table from a database in SQL?REMOVE TABLE · CUT TABLE · DROP TABLE · DELETE TABLE
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
Which of the following is a key-value store database?Oracle · Redis · PostgreSQL · MongoDB
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
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
Which command in SQL is used to change the structure of an existing table?MODIFY TABLE · CHANGE TABLE · ALTER TABLE · REFORM TABLE