Hash Table Operations:Consider a hash table with 7 slots that uses chaining to resolve collisions. The hash function is h(x) = x mod 7. Show the structure of the hash table after inserting the following sequence of integers: {15, 22, 36, 7, 10, 42, 29}. Demonstrate the process of searching for the number 22 in the hash table.
Question
Hash Table Operations:Consider a hash table with 7 slots that uses chaining to resolve collisions. The hash function is h(x) = x mod 7. Show the structure of the hash table after inserting the following sequence of integers: {15, 22, 36, 7, 10, 42, 29}. Demonstrate the process of searching for the number 22 in the hash table.
Solution
Sure, let's break this down step by step.
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Insertion: We are given a sequence of integers: {15, 22, 36, 7, 10, 42, 29}. We will insert these into the hash table using the hash function h(x) = x mod 7.
- For 15, h(15) = 15 mod 7 = 1. So, 15 goes into slot 1.
- For 22, h(22) = 22 mod 7 = 1. So, 22 also goes into slot 1. Since there is already a number in slot 1, we use chaining to resolve the collision. The structure in slot 1 is now {15, 22}.
- For 36, h(36) = 36 mod 7 = 1. So, 36 also goes into slot 1. The structure in slot 1 is now {15, 22, 36}.
- For 7, h(7) = 7 mod 7 = 0. So, 7 goes into slot 0.
- For 10, h(10) = 10 mod 7 = 3. So, 10 goes into slot 3.
- For 42, h(42) = 42 mod 7 = 0. So, 42 also goes into slot 0. The structure in slot 0 is now {7, 42}.
- For 29, h(29) = 29 mod 7 = 1. So, 29 also goes into slot 1. The structure in slot 1 is now {15, 22, 36, 29}.
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Searching: Now, let's demonstrate the process of searching for the number 22 in the hash table.
- We first compute the hash of 22, which is h(22) = 22 mod 7 = 1. So, we look in slot 1.
- In slot 1, we have a chain of numbers {15, 22, 36, 29}. We go through this chain from start to end, and find 22 in the second position.
So, the final structure of the hash table is:
Slot 0: {7, 42}
Slot 1: {15, 22, 36, 29}
Slot 2: {}
Slot 3: {10}
Slot 4: {}
Slot 5: {}
Slot 6: {}
And we found 22 in the hash table at slot 1, position 2.
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