Collision handling (open addressing) in Data Structures Theory - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the method used in open addressing for collision handling.

Data Structures Theory

In open addressing, when a collision occurs, the algorithm tries to find the next [1] slot in the hash table.

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Aempty

Boccupied

Cfull

Dlocked

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'occupied' or 'full' because they sound similar to 'empty'.

Open addressing searches for the next empty slot to resolve collisions.

2fill in blank

medium

Complete the code to describe the probing sequence in linear probing.

Data Structures Theory

In linear probing, the next slot is found by moving [1] step(s) forward from the current slot.

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Atwo

Bone

Cthree

Dzero

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'two' or 'three' thinking it jumps multiple slots.

Linear probing moves one step forward to find the next slot.

3fill in blank

hard

Fix the error in the description of quadratic probing.

Data Structures Theory

Quadratic probing finds the next slot by adding [1] to the original hash index, where i is the probe number.

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Ai + 1

Bi - 1

C2 * i

Di * i

Attempts:

3 left

💡 Hint

Common Mistakes

Using linear increments like 'i + 1' instead of quadratic increments.

Quadratic probing adds i squared (i * i) to the original hash index to find the next slot.

4fill in blank

hard

Fill both blanks to complete the formula for double hashing.

Data Structures Theory

The double hashing formula is: (hash1(key) + [1] * [2]) mod table_size.

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Ai

Bhash2(key)

Ckey

Dtable_size

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'key' or 'table_size' instead of the second hash function.

Double hashing uses the formula: (hash1(key) + i * hash2(key)) mod table_size to find the next slot.

5fill in blank

hard

Fill all three blanks to complete the explanation of open addressing.

Data Structures Theory

In open addressing, all elements are stored in the [1] itself. When a collision occurs, the algorithm probes the table using a sequence defined by [2] until an [3] slot is found.

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Ahash table

Bprobing function

Cempty

Dlinked list

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'linked list' for storage instead of 'hash table'.

Confusing 'probing function' with 'empty' slot.

Open addressing stores all elements in the hash table itself. It uses a probing function to find the next slot until an empty slot is found.