A transaction log records the value of a piece of data just before it is changed and the value just after it is changed. 1) True 2) False
Added by Erika A.
Close
Step 1
Step 1: A transaction log is a record of all the changes made to a database. Show more…
Show all steps
Your feedback will help us improve your experience
Akash M and 58 other AP CS educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
7. [10 pt] Assume that, after a crash, the log contains the following records: <T1 start> <T1 update, A, 200,600> <T2 start> <T2 update, C, 50,100> <T1 update, B, 300,200> <T3 start> <T4 start> <T3 update, D, 400,200> <T5 starts> <T4 update, E, 800,900> <T5 update, D, 200,100> <T2 commit> <T4 update, F,150,250> <T1 commit> (a) Which transactions (T1-T5) will be redone during the recovery? Answer: (b) Which transactions (T1-T5) will be undone during the recovery? Answer: (c) What will be the value of data items ‘C’ after the recovery algorithm has finished? Answer: (d) What will be the value of data items ‘B’ after the recovery algorithm has finished? Answer:
Akash M.
Kathleen C.
$7-8$ True or False? (a) $\log \frac{A}{B}$ is the same as $\log A-\log B$ (b) $\frac{\log A}{\log B}$ is the same as $\log A-\log B$
Exponential and Logarithmic Functions
Laws of Logarithms
Recommended Textbooks
Computer Science and Information Technology
Introduction to Programming Using Python
Computer Science - An Overview
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD