Practice Undo/Redo Logging (Combined Approach) - 10.2.4 | Module 10: Database Recovery | Introduction to Database Systems
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Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the purpose of logging both old and new values in transaction logs?

πŸ’‘ Hint: Think about what happens when a transaction fails.

Question 2

Easy

Define what a dirty page is in the context of a database.

πŸ’‘ Hint: Consider the state of data that a transaction was working on.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the purpose of the Redo Pass in the recovery process?

  • To roll back uncommitted transactions.
  • To reapply changes of committed transactions.
  • To identify active transactions.

πŸ’‘ Hint: Consider what you want the database state to be after a crash.

Question 2

True or False: The combined Undo/Redo logging approach only tracks old values.

  • True
  • False

πŸ’‘ Hint: Think about the flexibility this offers for recovery.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

In a busy e-commerce database, a user adds items to their cart, but during the payment process, the system crashes. Describe the potential impact of recovery without a combined Undo/Redo logging approach.

πŸ’‘ Hint: How would you restore user actions to a consistent state?

Question 2

Consider a scenario where multiple transactions occur simultaneously. Explain how the Undo/Redo combined logging not only enhances performance but also maintains data integrity.

πŸ’‘ Hint: Think about how tracking both values contributes to reliability.

Challenge and get performance evaluation