夢想加入 DateDog to revolutionize pet socializing? DateDog OA is the first hurdle, testing your coding skills and pet-tech problem-solving. It’schallenging, but don’t worry—programhelp has helped hundreds conquer big-tech OAs! We break down DateDog OA process withreal sample questions and practical tips to help you shine and get one step closer to your dream offer.
DateDog OA Preparation
DateDog’s OA typically runs on HackerRank or LeetCode, lasting 60-90 minutes with 2-3 coding questions. Get familiar with these platforms’ interfaces, like HackerRank’s code execution and test case tools. Practice LeetCode medium problems and aim to solve eachquestion in 30 minutes to build speed and accuracy.
DateDog OA Question Types
- Algorithms & Data Structures: Arrays, strings, linked lists, trees, often with dynamic programming or sliding windows, tied to pet-matching or recommendation scenarios.
- Scenario-Based Problems: Address DateDog’s business needs, like user behavior analysis or match optimization.
- Code Optimization: Solutions must be efficient in time and space, handling large datasets or high concurrency.
DateDog OA Sample Questions
Question 1: Log Parsing & Alerting
Problem Statement:
DataDog processes millions of logs daily. Write a function that parses a log file and triggers an alert if more than 10% of requests in the past hour had astatus code >= 500 (server errors).
Input:
logs = [
{"timestamp": "2023-05-25T12:00:00Z", "status": 200},
{"timestamp": "2023-05-25T12:30:00Z", "status": 500},
{"timestamp": "2023-05-25T13:00:00Z", "status": 502},
# ... thousands more logs
]Output:True if >10% of logs in the past hour have status >= 500, else False.
Question 2: Distributed Tracing
Problem Statement:
DataDog’s APM relies on distributed tracing. Given a trace tree where each node represents a service call, calculate the total time spent innon-leaf (parent) services.
Input:
class Node:
def __init__(self, service_name, duration_ms, children=None):
self.service_name = service_name
self.duration_ms = duration_ms # Time spent in this service
self.children = children or []
# Example trace tree:
# A(100)
# / \
# B(20) C(30)
# / \
# D(15) E(15)Output:130 ms (sum of durations for A, B, and C, excluding leaf nodes D and E).
Question 3: Metrics Anomaly Detection
Problem Statement:
DataDog uses machine learning to detect anomalies in system metrics. Given a time series of CPU usage percentages, identify “spikes” where the usage exceeds 2x the rolling average of the past 5 minutes.
Input:
metrics = [
{"timestamp": "2023-05-25T12:00:00Z", "cpu_usage": 50.0},
{"timestamp": "2023-05-25T12:01:00Z", "cpu_usage": 55.0},
{"timestamp": "2023-05-25T12:02:00Z", "cpu_usage": 120.0}, # Spike
# ... more data points
]Output:
List of timestamps where spikes occurred:
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