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Implement APIs on hackerrank. Almost all the code was already there and some other APIs were already implemented. Question was about implementing two more APIs with 1 or 2 filters related to hotel and their distances with city center.
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Software Engineer 2

Interviewed at Booking Holdings

4★
Aug 15, 2025

Implement APIs on hackerrank. Almost all the code was already there and some other APIs were already implemented. Question was about implementing two more APIs with 1 or 2 filters related to hotel and their distances with city center.

System Design - interviewers had a very old photostat of a photostat (just like some old Indian govt forms) which had the question. Taken by 2 engineers vising from their Netherland office. Design a credit card fraud detection system. Check card details in each new incoming booking as well as all old active bookings. Bank provide a 3rd party api which returns the list of fraud credit cards.
avatar

Software Engineer 2

Interviewed at Booking Holdings

4★
Aug 15, 2025

System Design - interviewers had a very old photostat of a photostat (just like some old Indian govt forms) which had the question. Taken by 2 engineers vising from their Netherland office. Design a credit card fraud detection system. Check card details in each new incoming booking as well as all old active bookings. Bank provide a 3rd party api which returns the list of fraud credit cards.

Question 1 - Integration Not Working I’m not seeing the metric system.disk.directory.file.bytes in my Datadog account. I’m trying to monitor our application directory and I have installed a Windows Datadog Agent onto our environment. This is what we have so far for the integration: init_config: instances: - directory: "C:\Users\projects\prod-application" I know I saved the configuration, directly after saving it I then checked the platform, and I’m still not receiving the metric. I tried uninstalling the Agent and setting up the integration again, but it tells me: 2021-07-19 08:06:22 UTC | CORE | INFO | (pkg/metadata/host/host.go:169 in getPublicIPv4) | No public IPv4 address found 2021-07-19 09:12:05 UTC | CORE | ERROR | (pkg/util/azure/diagnosis.go:21 in diagnose) | Azure HostAliases: unable to query metadata endpoint: status code 404 trying to GET http://111.254.167.255/metadata/instance/compute/vmId?api-version=201 7-04-02 2021-07-19 09:12:05 UTC | CORE | ERROR | (pkg/util/azure/diagnosis.go:21 in diagnose) | Azure HostAliases: unable to query metadata endpoint: status code 404 trying to GET http://169.254.169.254/metadata/instance/compute/vmId?api-version=201 7-04-02 2021-07-19 09:12:17 UTC | CORE | WARN | (pkg/autodiscovery/providers/file.go:192 in collectEntry) | C:\ProgramData\Datadog\conf.d\directory.d\conf.yaml is not a valid config file: yaml: line 3: found unknown escape character 2021-07-19 09:12:20 UTC | CORE | INFO | (pkg/serializer/serializer.go:374 in sendMetadata) | Sent metadata payload, size (raw/compressed): 1331/379 bytes. Can you let me know what I’m doing wrong so I can get this integration up and running?
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Technical Support Engineer 2%2C Premier %28US East%29

Interviewed at Datadog

4★
Apr 20, 2025

Question 1 - Integration Not Working I’m not seeing the metric system.disk.directory.file.bytes in my Datadog account. I’m trying to monitor our application directory and I have installed a Windows Datadog Agent onto our environment. This is what we have so far for the integration: init_config: instances: - directory: "C:\Users\projects\prod-application" I know I saved the configuration, directly after saving it I then checked the platform, and I’m still not receiving the metric. I tried uninstalling the Agent and setting up the integration again, but it tells me: 2021-07-19 08:06:22 UTC | CORE | INFO | (pkg/metadata/host/host.go:169 in getPublicIPv4) | No public IPv4 address found 2021-07-19 09:12:05 UTC | CORE | ERROR | (pkg/util/azure/diagnosis.go:21 in diagnose) | Azure HostAliases: unable to query metadata endpoint: status code 404 trying to GET http://111.254.167.255/metadata/instance/compute/vmId?api-version=201 7-04-02 2021-07-19 09:12:05 UTC | CORE | ERROR | (pkg/util/azure/diagnosis.go:21 in diagnose) | Azure HostAliases: unable to query metadata endpoint: status code 404 trying to GET http://169.254.169.254/metadata/instance/compute/vmId?api-version=201 7-04-02 2021-07-19 09:12:17 UTC | CORE | WARN | (pkg/autodiscovery/providers/file.go:192 in collectEntry) | C:\ProgramData\Datadog\conf.d\directory.d\conf.yaml is not a valid config file: yaml: line 3: found unknown escape character 2021-07-19 09:12:20 UTC | CORE | INFO | (pkg/serializer/serializer.go:374 in sendMetadata) | Sent metadata payload, size (raw/compressed): 1331/379 bytes. Can you let me know what I’m doing wrong so I can get this integration up and running?

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