1 / 5
Fill in: 'We ___ a ping frame every thirty seconds so idle connections don't get silently dropped by a proxy.'
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We 'send a ping' — the standard collocation for issuing a heartbeat frame. The other options aren't idiomatic here.
2 / 5
Fill in: 'A client that fails to ___ a pong within the timeout window is treated as disconnected.'
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We 'return a pong' — the standard collocation for replying to a heartbeat. The other options are less idiomatic here.
3 / 5
Fill in: 'A missing heartbeat can ___ a stale connection that looks alive but never sends data again.'
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We say a missing heartbeat will 'leave' a stale connection — the standard, natural collocation here. The other options aren't idiomatic here.
4 / 5
Fill in: 'We ___ the heartbeat interval against the load balancer's own idle timeout so they don't conflict.'
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We 'tune' an interval — the standard collocation for calibrating a timing value. The other options are less idiomatic here.
5 / 5
Fill in: 'We ___ a connection immediately once three consecutive pongs are missed.'
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We 'close a connection' — the standard, simple collocation for terminating it. The other options are less idiomatic here.