Computer Science Illuminated
7th Edition
ISBN: 9781284155617
Author: Nell Dale, John Lewis
Publisher: Jones & Bartlett Learning
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Chapter 10, Problem 34E
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Multiprogramming:
- Multiprogramming is the concept in which several processes or programs runs in a single Central Processing Unit(CPU).
- The other name of multiprogramming is “parallel
programming ” in which more processes runs at the same time in single CPU. - The multiple processes are scheduled by running the programs in CPU. Sometimes, the computer will be blocked for a specific time to permit the processing time for other programs.
- In the multiprogramming systems, the program appears to be run at the same time but generally, the CPU executes the parts of each program one by one and then submit the result on given time.
Time sharing:
- Time sharing is the sharing of computer resources by multiple users with the corresponding computer time...
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Subject: Database management system
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Test if the following schedule is conflict serializable or not and explain
R1 (A), R2 (D), W1 (B), R2 (B), W3 (B), R4 (B), W2 (C), R5 (C), W4 (E), R5 (E), W5 (B).
Subject: Database management system
Explain in easy way with write handwritten note
Test if the following schedule is conflict serializable or not and explain
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Subject: Database management system
Explain in easy way with write handwritten note
a. What is lossy decomposition? Check whether the following decompositions are lossy or lossless.
(i) Let R=ABCD, R1 = AD, R2 = AB, R3 = BE, R4 = CDE, R5 = AE, F={ A->C, B- >C, C->D, DE->C, CE->A}
(ii) R (XYZWQ), FD= {X->Z, Y->Z, Z->W, WQ->Z, ZQ-> X, R1 (XW), R2 (XY), R3 (YQ) , R4 (ZWQ), R5 (XQ)
b. Eliminate redundant FDs from
(i) F={X->Y, Y->X, Y->Z, Z->Y, X->Z, Z->X}
(ii) F = {X->YZ, ZW->P, P->Z, W->XPQ, XYQ, YW, WQ ->YZ}
Chapter 10 Solutions
Computer Science Illuminated
Ch. 10 - Prob. 1ECh. 10 - Prob. 2ECh. 10 - Prob. 3ECh. 10 - Prob. 4ECh. 10 - Prob. 5ECh. 10 - Prob. 6ECh. 10 - Prob. 7ECh. 10 - Prob. 8ECh. 10 - Prob. 9ECh. 10 - Prob. 10E
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