Design a unique ID generator in HLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to choose the component responsible for generating unique IDs.

HLD

The unique ID generator system primarily uses a [1] to create IDs.

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Atimestamp

Bload balancer

Ccache

Ddatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing database as the primary generator instead of timestamp.

Confusing cache with ID generation.

The timestamp is commonly used to ensure uniqueness by incorporating the current time into the ID.

2fill in blank

medium

Complete the code to select the method that prevents ID collisions in a distributed system.

HLD

To avoid ID collisions, the system uses [1] to differentiate IDs generated by different nodes.

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Arandom numbers

Bencryption

Cnode identifiers

Dcaching

Attempts:

3 left

💡 Hint

Common Mistakes

Using random numbers alone which can cause collisions.

Thinking encryption prevents collisions.

Node identifiers help ensure that IDs generated on different machines do not clash.

3fill in blank

hard

Fix the error in the ID generation logic to ensure IDs are sortable by creation time.

HLD

ID = [1] + node_id + sequence_number

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AUUID

Brandom_number

Chash_value

Dtimestamp

Attempts:

3 left

💡 Hint

Common Mistakes

Using random_number which does not guarantee order.

Using UUID which is not time sortable.

Using a timestamp at the start ensures IDs can be sorted by creation time.

4fill in blank

hard

Fill both blanks to complete the ID structure with time and uniqueness components.

HLD

ID = [1] + [2]

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Atimestamp

Bnode_id

Crandom_suffix

Dchecksum

Attempts:

3 left

💡 Hint

Common Mistakes

Using random_suffix instead of node_id which can cause collisions.

Adding checksum which is not necessary for uniqueness.

The ID combines a timestamp and a node identifier to ensure uniqueness and order.

5fill in blank

hard

Fill all three blanks to complete the ID generation formula ensuring uniqueness, order, and scalability.

HLD

ID = [1] + [2] + [3]

Drag options to blanks, or click blank then click option'

Atimestamp

Bsequence_number

Cnode_id

Drandom_number

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up sequence_number and node_id positions.

Using random_number which can cause collisions.

The ID uses a timestamp for order, a node ID for source uniqueness, and a sequence number to handle multiple IDs generated in the same timestamp.