42) Select the expression that is equivalent to (x + y)z. a. x+y+z b. x+y+z c. x+y+z d. x+y+z

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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42) Select the expression that is equivalent to (x + y)z .
a. x+y+z
b. x+y+z
C. x+y+z
d. x+y+z
43) Select the Boolean expression that is equivalent to x + y.
a. (x1x) ↓ (y ↑y)
b. (x 1 x) ↑ (y ↑y)
c. (x ↑y) ↓ (x ↑ y)
d. (x ↓x) ↓ (y + y)
↓
Transcribed Image Text:42) Select the expression that is equivalent to (x + y)z . a. x+y+z b. x+y+z C. x+y+z d. x+y+z 43) Select the Boolean expression that is equivalent to x + y. a. (x1x) ↓ (y ↑y) b. (x 1 x) ↑ (y ↑y) c. (x ↑y) ↓ (x ↑ y) d. (x ↓x) ↓ (y + y) ↓
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Boolean Expression

Logic statements that can only be TRUE or FALSE are known as Boolean expressions. Any form of data can be compared using boolean expressions as long as both portions of the expression use the same fundamental data type. Data can be tested to determine whether it is more than, equal to, or inferior to other data.

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