We need to ___ the code so we can measure each function's latency.
To instrument code means to add measurement points (spans, metrics, logs) so its behaviour can be observed. It is the core observability collocation: "instrument the handlers with tracing". "Tool up", "wire", and "gear" are not the technical term. Instrument pairs with code, service, and application, and is the prerequisite for any tracing or metrics work.
2 / 5
Distributed tracing lets us ___ a request across all services.
To trace a request means to record its full path through multiple services as a connected set of spans. It is the defining collocation of distributed tracing: "trace the checkout request end-to-end". "Follow round", "track over", and "chase" are not the term. Trace pairs with request, span, and transaction, capturing how work flows across a system.
3 / 5
To control cost we will ___ only one in a hundred traces.
To sample traces means to capture only a fraction of them to limit data volume and cost. It is the standard term: "sample at 1%", "head-based sampling". "Pick out", "choose off", and "select up" are not idiomatic. Sample pairs with rate, traces, and requests, and is key to balancing observability detail against storage cost.
4 / 5
A trace ID lets us ___ logs from every service for one request.
To correlate logs means to link related log lines (often by trace or request ID) so you can see the full story of one operation. It is the precise collocation: "correlate logs across services". "Line up", "match over", and "pair off" are vaguer. Correlate pairs with logs, traces, and events, and turns scattered records into a coherent timeline.
5 / 5
From the dashboard we can ___ into a single slow span.
To drill down means to navigate from a high-level view into increasingly specific detail, such as from a service to one slow span. It is the standard analysis collocation: "drill down into the failing trace". "Dig over", "bore in", and "cut down" are not idiomatic. Drill down pairs with "into", and describes iterative investigation in observability tools.