Computer Science Illuminated
7th Edition
ISBN: 9781284155617
Author: Nell Dale, John Lewis
Publisher: Jones & Bartlett Learning
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Chapter 10, Problem 27E
Explanation of Solution
Difference between application software and system software:
The following are difference between the “application software” and “system software”.
| Application software | System software |
| This is the software which is specially designed for end users. |
This is the |
| It cannot control hardware devices. | It is designed to operate computer hardware devices. |
|
The system software provides a platform for the application software... |
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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}
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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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