Here is the value of X is 1 5. (a) What is Primary Clustering? Which Collision Resolution technique resolves thissuffering?(b) Consider an open-addressing hash table as shown below (Table 2). The table alreadycontains three data items. Assume that collisions are handled by the following hashfunction.h(k, i) = (h'(k) + i h2(k)) mod 13,(2k + 7) mod 13 and h2(k) = (k + 5) mod 13.where h'(k)By showing calculations, redraw Table 2 and show following operationsi.Insert 70ii.Insert 83ii.Insert Xiv.Search 991234578101112441251Table 2: Open Addressing Table

Open Addressing: It is process of placing the element in the hash table and in case of collision…

Answered: 5. (a) What is Primary Clustering?…

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5. (a) What is Primary Clustering? Which Collision Resolution technique resolves this suffering?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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Question

Here is the value of X is 1

5. (a) What is Primary Clustering? Which Collision Resolution technique resolves this
suffering?
(b) Consider an open-addressing hash table as shown below (Table 2). The table already
contains three data items. Assume that collisions are handled by the following hash
function.
h(k, i) = (h'(k) + i h2(k)) mod 13,
(2k + 7) mod 13 and h2(k) = (k + 5) mod 13.
where h'(k)
By showing calculations, redraw Table 2 and show following operations
i.
Insert 70
ii.
Insert 83
ii.
Insert X
iv.
Search 99
1
2
3
4
5
7
8
10
11
12
44
12
51
Table 2: Open Addressing Table

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b) Consider an empty hash table of size 7. Draw the table that results after inserting, in the given order, the following key values: {19, 26, 13, 48, 17} when collisions are managed and handled by double hashing method with function: h(k, i) = [h,(k) + i * hz(k)] mod 7, where h, (k) = k mod 7 and h, (k) = 5 – (k mod 5). I. 812 3 4 5 6
3. A hash table H is implemented by open addressing with double hashing. a. If there are n elements inserted to H, what are the two criteria such that the expected number of collisions is not greater than 2ln2? b. Furthermore, if n = 100, what is the smallest size of H meeting the two criteria?
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