Which of the following is NOT a valid prefix expression?
a) – + a b + c d
b) / a + b c
c) + a b c d
d) – a b c d
D
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Consider the three transactions T1, T2, and T3, and the schedules S1 and S2 given below. Draw the serializibility (precedence) graphs for S1 and S2 and state whether each schedule is serializable or not. If a schedule is serializable, write down the equivalent serial schedule(s).
T1: r1(x); r1(z); w1(x) T2: r2(z); r2(y); w2(z); w2(y) T3: r3(x); r3(y); w3(y) S1: r1(x); r2(z); r1(x); r3(x); r3(y); w1(x); w3(y); r2(y); w2(z); w2(y) S2: r1(x); r2(z); r3(x); r1(z); r2(y); r3(y); w1(x); w2(z); w3(y); w2(y)
A field's ________ determine how that field functions
Fill in the blank(s) with correct word
Unlike arrays, hashes are limited to storing only numeric and string data.
Answer the following statement true (T) or false (F)
School districts often develop policies and guidelines that address ____.?
A. ?social media sharing B. ?cyberbullying C. ?cyberstalking D. ?cookies