EBK DATABASE SYSTEM CONCEPTS
7th Edition
ISBN: 9781260049268
Author: SILBERSCHATZ
Publisher: MCG COURSE
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Expert Solution & Answer
Chapter 15, Problem 20E
Explanation of Solution
a.
Nested-loop join:
Use R1 outer relation we need,
...
Explanation of Solution
b.
Block nested-loop join:
- If R1 is outer relation, we need ceiling (800 / (M−1)) ∗ 1500 + 800 disk accesses...
Explanation of Solution
c.
Merge join:
Let R1 and R2 be unsorted relation, and M be the pages of memory.
If M>800, then it is easy to do join in 2300(800+1500) disks.
Therefore, we will only take case where M<=800 pages...
Explanation of Solution
d.
Hash join:
Let us assume that there is no overflow in the join then R1 is smaller than R2, there for e will use R2 as probe relation and R1 as build relation...
Expert Solution & Answer
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1) Apply the Paint Blue algorithm discussed in class to the following Finite Automata.
a
a
a
b
b
a
COIS-3050H-R-W01-2025WI-COMB Formal
Languages & Automata
a
b
Show the status of the Finite Automata at the conclusion of the Paint Blue Algorithm (mark the
visited states with an X and only include edges that have not been followed).
2) Use the pumping lemma to prove the following language is nonregular:
L= {ab} = {abbb, aabbbbbb, aaabbbbbbbbb, ...}
3) Find CFGs that for these regular languages over the alphabet Σ= {a, b}. Draw a Finite Automata
e CFG.
1
COIS-3050H-R-W01-2025WI-COMB Formal
anguages & Automata
Is that contain the substring aba.
(b) The language of all words that have an odd number letters and contains the string bb.
(c) The language of all words that begin with the substring ba and contains an odd number of
letters.
4) Convert the following FA into a PDA.
a
a
S±
b
a
a
Ν
Ꮓ
Chapter 15 Solutions
EBK DATABASE SYSTEM CONCEPTS
Knowledge Booster
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