Quiz: Module 08: Databases and Data

Question 1. What is the primary advantage of a database over storing data in flat files?

Question 2. Which SQL command retrieves data from a table?

Question 3. What is a primary key?

Question 4. True or False: A non-relational (NoSQL) database requires a fixed schema where every record has the same fields.

Question 5. Which of the following is a key-value database use case?

Question 6. What does the "A" in ACID stand for?

Question 7. A banking application transfers $500 from Account A to Account B. The debit succeeds but the system crashes before the credit. With ACID compliance, what happens?