Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- explain each code line. all the details.arrow_forwardI am having a hard time finding the right approach for the question. I need a justified answer. Could you please help me through?arrow_forwardTask - 1: Write a java program to implement the following algorithms for Open Addressing techniques for Hash Table data structure. (Use a simple array of integers to store integer key values only). HASH-SEARCH(T, k) HASH-INSERT (T, k) i = 0 repeat j = h (k, i) if T[j] == NIL T[j] = k return j else i = i + 1 ● i = 0 repeat until i == m error “hash table overflow" For both algorithms, to compute the index j, write the following methods: getLinear ProbIndex (key, i) getQuadraticProbIndex ● get DoubleHash (key, i) (key, i) j = h (k, i) if T[j] == k return j i = i + 1 until T[j] == NIL or i = m return NIL Linear Probing index is computed using following hash function: h(k, i) = (h₁(k) + i) mod m h₁(k)= k mod m Quadratic probing index is computed using following hash function: h(k, i) = (h₁(k) + i²) mod m h₁(k)= k mod m Double hashing index is computed using following hash function: h(k, i) = (h₁(k) + i h₂(k)) mod m h₁(k)= k mod m h₂(k) = 1 + (k mod m - 1)arrow_forward
- This quesiton are for another page I will linked them.arrow_forwardAllocation Мах Available АВCD АВСD АВСD То T1 T2 T3 0012 0012 1520 1000 1750 1354 2356 0632 0014 0652 0656 Answer the following questions using the banker's algorithm: a. What is the content of the matrix Need? b. Is the system in a safe state? c. If a request from thread T1 arrives for (0,4,2,0), can the request be granted immediately? 2)arrow_forwardI am using a proof of work protocol with a 8-bit hash function. In other words, the digest is always 8-bits. The difficulty I have set for this proof of work protocol is 6. In binary, which of the following hash digests would satisfy this proof of work protocol? In other words, as you are searching for a response string, what would be an example of a hash output that would make you stop? 11111010 01000101 11000000 00000011 11111100 01111111 10101001arrow_forward
- Question 15arrow_forward6. 10 11 12 13 14 15 16 17 18 19 20 21 22 23| 24 | 25 26 27 28 || 29 || 30 31 32 33 34 35 36 37 Maving to the next question prevents changes to this answer. Quèstion 9 A hash table of length 10 uses open addressing with hash function h(k)-k mod 10, and linear probing. After inserting 6 values into an empty hash table, the table is as shown below 2. 42 23 4 34 52 9. 46 7. 33 8. 6. Which one of the following choices gives a possible order in which the key values could have been inserted in the table? OA 46, 42, 34, 52, 23, 33 OB. 34, 42, 23, 52, 33, 46 OC 46, 34, 42, 23, 52, 33 OD.42, 46, 33, 23, 34, 52 1947117.htm Failed - Forbiddenarrow_forwardConsider the following scenario: M A table is sorted on indexed column and has 20,000,000 rows. C . Each row is 300 bytes. Table and index blocks are 4 kilobytes. Assume 1 kilobyte is approximately 1,000 bytes. Assuming the index is sparse, how many entries are in the index? 000,000,000 entries 1 Check hp 2 Try again 4 5arrow_forward
- Consider a hash table of capacity 5 that uses open addressing with linear probing. This hash table uses a hash function that takes the remainder when the hash code of a string is divided by the capacity of the hash table. (For example, "air" hashes 0.) The hashCode method has been overridden for strings, which simply returns 0 if a string begins with 'a', 1 if it begins with 'b', etc. /** Returns 0 if a String begins with 'a', 1 if it begins with 'b', etc. */ public int hashCode() { return this.charAt(0) - 'a'; } Assume that "apple", and "butter" have been inserted in this order into the hash table. "fig" is to be inserted into the hash table. (a) Which array slot/index should "fig" be placed? Answer: (b) What is the load factor after "fig" is inserted into the hash table? Answer:arrow_forwardWhat is the total number of linked lists included in an interleaving routing table of dimension T? Which kind of primitive data structure is used in the Separate Recursive hash table?arrow_forwardHow many collisions would you expect to find in the following cases? a. Your hash function generates a 12-bit output and you hash 1024 randomly selected messages. b. Your hash function generates an n-bit output and you hash m randomly selected messages.arrow_forward
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