Gossip protocol in HLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main purpose of a gossip protocol.

HLD

The gossip protocol is mainly used for [1] information among nodes in a distributed system.

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Asynchronizing

Bblocking

Cencrypting

Disolating

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing options related to security or blocking instead of sharing.

The gossip protocol helps nodes share and synchronize information efficiently.

2fill in blank

medium

Complete the code to describe how nodes select peers in gossip protocol.

HLD

In gossip protocol, each node randomly selects [1] to exchange information with during each round.

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Aall nodes

Bonly itself

Cone or more peers

Da central server

Attempts:

3 left

💡 Hint

Common Mistakes

Assuming communication is with all nodes or a central server.

Nodes randomly pick one or more peers to share updates, ensuring information spreads quickly.

3fill in blank

hard

Fix the error in the description of gossip protocol's fault tolerance.

HLD

Gossip protocol is [1] to node failures because information is spread redundantly across many nodes.

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Aresistant

Bdependent

Cvulnerable

Dunaware

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'vulnerable' which is the opposite of correct meaning.

The protocol is resistant to failures due to redundant information spreading.

4fill in blank

hard

Fill both blanks to complete the description of gossip protocol's message complexity and convergence.

HLD

The message complexity per round is typically [1], and the protocol converges in [2] rounds.

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AO(n)

BO(1)

Clog n

Dn^2

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing message complexity with total messages in the network.

Each node sends messages to a constant number of peers (O(1)), and the protocol converges in logarithmic rounds (log n).

5fill in blank

hard

Fill all three blanks to complete the pseudocode for a gossip protocol round.

HLD

def gossip_round(node):
    peer = node.[1]()
    data_to_send = node.[2]()
    peer.[3](data_to_send)

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Aselect_random_peer

Bget_updates

Csend_updates

Dbroadcast

Attempts:

3 left

💡 Hint

Common Mistakes

Using broadcast instead of sending to one peer.

The node selects a random peer, gets its updates, and sends them to the peer.