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Tell me about a time you reconciled different opinions and moved a project forward.

• Context
• Disagreement
• Action
• Outcome

1. S Explain the project context and the disagreement.
2. T Explain the problem you were responsible for resolving.
3. A Describe how you communicated, weighed trade-offs, and moved the work forward.
4. R Add your actual outcome and explain what you learned.

Add your own real experience

How would you investigate an increase in API latency?

Listening language

English

Answer language

English

1. Confirm when the latency increase began and which requests are affected.
2. Inspect the request path, database, and external dependencies.
3. Use metrics to confirm the bottleneck, then explain the fix and regression checks.

Iterate through the array and store each previously seen value and its index in a hash map. Check whether the complement has already been seen before inserting the current value, so the current element is not used twice. Time complexity is O(n); extra space is O(n).

def two_sum(nums, target):
    seen = {}
    for i, x in enumerate(nums):
        if target - x in seen:
            return [seen[target - x], i]
        seen[x] = i

print(two_sum([3, 3], 6))  # [0, 1]