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HLDsystem_design~10 mins

Message ordering guarantees in HLD - Interactive Code Practice

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Practice - 5 Tasks
Answer the questions below
1fill in blank
easy

Complete the code to specify the message ordering type that ensures messages are received in the exact order they were sent.

HLD
message_ordering = "[1]"
Drag options to blanks, or click blank then click option'
Aat-least-once
Bunordered
CFIFO
Dat-most-once
Attempts:
3 left
💡 Hint
Common Mistakes
Confusing ordering with delivery guarantees like at-least-once.
2fill in blank
medium

Complete the code to select the message ordering guarantee that allows messages to be delivered more than once but preserves order.

HLD
message_guarantee = "[1]"
Drag options to blanks, or click blank then click option'
Aat-least-once
Bunordered
Cbest-effort
Dexactly-once
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing exactly-once which is harder to achieve.
3fill in blank
hard

Fix the error in the code to correctly represent a system that guarantees no message reordering.

HLD
if system_guarantee == "[1]":
    process_messages_in_order()
Drag options to blanks, or click blank then click option'
Aunordered
BFIFO
Cat-most-once
Dbest-effort
Attempts:
3 left
💡 Hint
Common Mistakes
Using unordered or best-effort which do not guarantee order.
4fill in blank
hard

Fill both blanks to complete the code that filters messages to ensure only those with correct ordering and delivery guarantees are processed.

HLD
if message.ordering == "[1]" and message.delivery == "[2]":
    process(message)
Drag options to blanks, or click blank then click option'
AFIFO
Bat-least-once
Cunordered
Dexactly-once
Attempts:
3 left
💡 Hint
Common Mistakes
Mixing unordered with exactly-once which is rare and complex.
5fill in blank
hard

Fill all three blanks to complete the code that creates a message processing pipeline with ordering, delivery, and deduplication steps.

HLD
pipeline = ["[1]", "[2]", "[3]"]
Drag options to blanks, or click blank then click option'
Aordering
Bdeduplication
Cdelivery
Dencryption
Attempts:
3 left
💡 Hint
Common Mistakes
Placing deduplication before delivery or mixing encryption which is unrelated.