Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:What causes a bucket overflow in a hash file structure, and how does it happen? Was there anything
that could be done to reduce the number of overflowing buckets?
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- The following is a prioritised list of considerations that might impact a hash table's Big-O performance:arrow_forwardHow does the "join" method work in multithreading? When would you use it, and what happens if it's not used correctly?arrow_forward1. An open hashing scheme requires the use of random access ( true /false ). 2. A good hashing function should ___ distribute the records amongthe buckets. 3. For an open hashing scheme with 100 buckets and 4000 records,the average number of record reads to locate a record is equal to___.arrow_forward
- The factors that affect a hash table's Big-O performance are listed below in decreasing order of significance:arrow_forwardProgramming Language Pragmatics, 4th Editionarrow_forwardTo what extent does using a hash table facilitate quicker processing times than a traditional list? Is there anything that might be the problem here?The implementation of a hashtablearrow_forward
- What is the total number of linked lists in a chaining hash table of size T? What kind of basic data structures are contained in the Separate Chaining hash table?arrow_forwardwhich index is also reffered to as a non-clustering index? a) Bidirectional Index b) Primary Index c) Hash Index d) Secondary Indexarrow_forwardDifference between Cache and HashMap.arrow_forward
- import hashlib def hash_function(password, salt, al): if al == 'md5': #md5 hash = hashlib.md5(salt.encode() + password.encode()) hash.update(password.encode('utf-8')) return hash.hexdigest() + ':' + salt elif (al == 'sha1'): #sha1 hash = hashlib.sha1() hash.update(password.encode('utf-8')) return hash.hexdigest() + ':' + salt elif al == 'sha224': #sha224 hash = hashlib.sha224() hash.update(password.encode('utf-8')) return hash.hexdigest() + ':' + salt elif al == 'sha256': #sha256 hash = hashlib.sha256() hash.update(password.encode('utf-8')) return hash.hexdigest() + ':' + salt elif al == 'blake2b': #blake2b512 hash = hashlib.blake2b() hash.update(password.encode('utf-8')) return hash.hexdigest() + ':' + salt else: print("Error: No Algorithm!") if __name__ == "__main__": # TODO: create a list called hash_list that contains # the five hashing algorithsm as strings # md5, sha1, sha224, sha256, blake2b hash_list =...arrow_forwardThis section provides a prioritized list of factors that affect the Big-O performance of a hash table:arrow_forwardFor every block chain, what information is always registered within every block? (a)The previous block is hash, (b)The current block is hash, (c)The next block is hash, (d) all the previous block is hash?arrow_forward
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