he following query is given as an expression of relational algebra. Project[Account.aid,Payment.vend_aid]( Join[Account.aid=Payment.payer_aid](  Select[amount>10000](Account),  Payment)) All tables have a hash-based index defined on the keys. Suppose that we have a B+ trees defined on Account.amount and a hash index on Payment.payer_aid. Which of the following two join algorithms performs better in the above query: the index nested loops join or the hash join? Base the estimation on the number of blocks read from the disk. Write all assumptions.

Q: Explain how to break down the hybrid hash-join operator into sub-operators in order to mimic…

A: This question tells about break down the hybrid hash-join operator into sub-operators in order to…

Q: Which of the following is the hashing function for separate chaining? a) H(x)=(hash(x)+f(i)) mod…

A: Simply, a table used for storing the records is called hash table. And function  f(key) is called as…

Q: 5. After keys: 24, 17, 32, 26, 44, 62 are given, Use linearly exploration method to build a closed…

A: here we have given solution to build a closed hash table and generated ASL values

Q: Search online for an MD-5 hash generator. What is the hash for your name? Try it without using…

A: In this question we have to look for MD5 HASH GENERATOR, where we need to find the hash for the name…

Q: Du are asked to insert the following values into the hashing table size 9:

A: In a hash table of size 9 , an element x would be placed at location x% 9.  If there is a collision,…

Q: expected average chain length

A: No. Of keys that are inserted into hash table = N Size of hash table = H

Q: For a hash table of size 23, the hash function used is h1(key)=key%23. Initially the table contains…

A: Your answer is given below.

Q: Explain “Shift folding in the hashing” in detail.

A: Increased customer satisfaction  which can ultimately result in increased revenue and profitability…

Q: Best hash function will never create any collision among the hash table values. O True O False…

A: Answer 3:  True Best hash function will never create any collision among the hash table value.

Q: tore up to 3 records. The constraint on the number of buckets is R <= 2.5N, where R is the total…

A: Anonymous answered this Was this answer helpful?00454 answersThe number of buckets is such that R…

Q: Try switching the joins pthread_join(tid2, NULL); pthread_join(tid1, NULL); Do you see any…

A: Mutex  lосk  will  оnly  be  releаsed  by  the  threаd  whо  lосked  it.  Sо  this  ensures  thаt…

Q: How many linked lists altogether are there in a chaining hash table of size T? The Separate Chaining…

A: Given: In this particular inquiry, we wanted to know how many linked lists are included within a…

Q: Consider the query:select *from r, swhere upper(r.A) = upper(s.A);where “upper” is a function that…

A: Hash join: Hash-join itself is the type of joining techniques used for the processing of join…

Q: Which ADT table implementations performs better on the average if the retrieve operation is the…

A: On an average, hash tables are faster as their search time can be as less as O(1) as the number of…

Q: QUESTION 6 Consider a hash table with items 10, 31, 23, 54, 66, 88, and 9, and a hash function of…

A: Question 6   So, The correct option is 46, 99, 93, 97

Q: Using quadratic probing, what would be the answer for the following questions if you insert the…

A: Here, we have to complete the hashtable with the keys given above.

Q: How many linked lists are there in a chaining hash table of size T? What is/are the elementary data…

A: Here in this question we have asked that How many linked lists are there in a chaining hash table of…

Q: Why do Rainbow Tables use a different reduction function for each step in the hash chain?

A: Rainbow Tables: Untangling the Power of Reduction Functions Cracking passwords has always been a…