see description 4789634 2

Assignment #8

Instruction for properly completing the assignment:

Due Sunday of Week 8 by 11:55 PM [5% of your grade]

  1. Download the attached template called “INFO620-Assignment8_LastNameFirst.doc”.
  2. Change the file name applying your Last Name and First Name in place of the LastNameFirst.
  3. Then open the newly saved file and enter your name and the date due on the top of the document.
  4. Then enter each problem’s solution within this same file in their proper locations WITHOUT changing or erasing the questions.
  5. Support your responses and answers by references from the text.
  6. Review and complete all questions.
  7. Then upload to Assignment #8 area of the Assignments.
  8. Your grade may be reduced if these instructions are NOT followed closely.

Week 8 Assignment Grading Rubric: 

#23.21

0.8 points

#23.27

0.8 points

#23.22

0.8 points

#24.34

0.9 points

#23.25

0.8 points

#24.34

0.9 points

Here are the contents of Assignment #8 (however – please use the template attached  – don’t copy and paste from here):

CH 23: DATABASE RECOVERY TECHNIQUES

23.21 – Suppose that the system crashes before the [read_item, T3, A] entry is written to the log in Figure 23.1 (b); will that make any difference in the recovery process?

23.22 – Suppose that the system crashes before the [write_item, T2, D, 25, 26] entry is written to the log in Figure 23.1 (b); will that make any difference in the recovery process?

23.25 – How does checkpointing in ARIES differ from checkpointing as described in Section 23.1.4?

23.27 – What implications would a no-steal/force buffer management policy have on checkpointing and recovery?

CH 24: DATABASE SECURITY

24.33 – Suppose that privilege (a) of exercise 24.32 is to be given with GRANT OPTION but only so that account A can grant it to at most five accounts, and each of these accounts can propagate the privilege to other accounts but without the GRANT OPTION privilege. What would the horizontal and vertical propagation limits be in this case?

24.34 – Consider the relation shown in Figure 24.2 (d). How would it appear to a user with classification U? Suppose a classification U user tries to update the salary of “Smith” to $50,000; what would be the result of this action?

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