a. MRU is preferable to LRU: The MRU is preferable where the operation R1 ⋈ R2 is computed. The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

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Answer 1

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Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

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Need Help: Which of the following statements about confusion matrix is wrong A) Confusion matrix is a performance measure for probability prediction techniques B) Confusion matrix is derived based on classification rules with cut-off value 0.5 C) Confusion matrix is derived based on training partition to measure a model’s predictive performance D) None of the above

Answer 2

Expert Solution & Answer

Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Expert Solution & Answer

Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Expert Solution & Answer

Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Expert Solution & Answer

Answer 6

Expert Solution & Answer

Answer 7

Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

Answer 8

Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Answer 9

Chapter 13, Problem 7PE

Explanation of Solution

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Answer 10

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

Answer 11

Explanation of Solution

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...

Answer 12

Expert Solution & Answer

Answer 13

Expert Solution & Answer

Answer 14

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Answer 15

Ch. 13 - Prob. 1PE Ch. 13 - Prob. 2PE Ch. 13 - Prob. 3PE Ch. 13 - Prob. 4PE Ch. 13 - Prob. 5PE Ch. 13 - Prob. 6PE Ch. 13 - Prob. 7PE Ch. 13 - Prob. 8PE Ch. 13 - Prob. 9E Ch. 13 - Prob. 10E

a. MRU is preferable to LRU: The MRU is preferable where the operation R1 ⋈ R2 is computed. The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

a. MRU is preferable to LRU: The MRU is preferable where the operation R1 ⋈ R2 is computed. The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

Explanation of Solution

b. LRU is preferable to LRU: The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting. It is needed to “back-up” in one of the relation if the duplicates occur...

Want to see the full answer?

Chapter 13 Solutions

a.

MRU is preferable to LRU:

The MRU is preferable where the operation R1 ⋈ R2 is computed.

The above is computed using nested loop processing strategy. In this strategy, each tuple in R2 must be compared to each block in R1...

b.

LRU is preferable to LRU:

The LRU is preferable to MRU where R1 ⋈ R2 is computed by sorting the relations by joining the values. Here comparing the values through the relation is also done for the sorting.

It is needed to “back-up” in one of the relation if the duplicates occur...