GCP Interview Questions 2026
Published July 22, 2026 · Updated July 22, 2026
19 GCP interview questions from Google, LTIMindtree. All difficulty levels, all roles. Upvoted by engineers who were asked them.
19 questions
Companies: Google, LTIMindtree
338 upvotes
GCP Questions by Company
Google (2)
Google
Hard
System Design round
Distributed SystemsKafkaGCP
Design Google Maps ETA calculation.
How do you compute the fastest route for 1B+ users in real time? Cover: graph representation of road network, Dijkstra vs A* vs Contraction Hierarchies, live traffic data ingestion, and how you handle road closures.
↑ 72 upvotes · 48 engineers asked this · SDE2
Google
Hard
System Design round
Distributed SystemsGCP
Design Bigtable or a wide-column store from scratch. Explain SSTable, memtable, compaction strategies (size-tiered vs levelled), bloom filters for read optimisation, and how you handle tombstones for deletes.
↑ 53 upvotes · 31 engineers asked this · Staff
LTIMindtree (17)
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCPJava
How would you process and track real-time data in GCP?
↑ 12 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCP
How do you maintain security across GCP services?
↑ 9 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Easy
Technical round
5–8 YearsInterview ExperienceGCP
What are Service Accounts in GCP, and when would you use them?
↑ 8 upvotes · 3 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCP
How would one GCP service securely communicate with another GCP service?
↑ 10 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCP
Suppose you have a production issue in GCP. How would you handle it end to end?
↑ 11 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCPMicroservices
What would you do if one of your services goes down in production?
↑ 9 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCPKubernetesDocker
GKE vs Cloud Run — when would you choose each?
↑ 16 upvotes · 3 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceJavaGCP
How would you integrate Google Cloud Pub/Sub into a Java application?
↑ 13 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Medium
System Design round
5–8 YearsInterview ExperienceJavaGCPSystem Design
Explain the architecture of your Java application on GCP.
↑ 10 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Hard
Technical round
5–8 YearsInterview ExperienceJavaGCP
Write a Java application that publishes a message to Google Cloud Pub/Sub when a new payment is processed.
↑ 18 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Hard
System Design round
5–8 YearsInterview ExperienceJavaGCPMicroservices
Which design patterns would you choose while designing an event-driven architecture on GCP?
↑ 14 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Hard
Technical round
5–8 YearsInterview ExperienceJavaGCP
Create an Apache Beam pipeline that reads a text file from Google Cloud Storage (GCS), converts all text to uppercase, and writes the output back to GCS.
↑ 15 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Hard
System Design round
5–8 YearsInterview ExperienceGCPSystem DesignDistributed Systems
If data volume increases significantly, how would you modify your service architecture?
↑ 12 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Hard
System Design round
5–8 YearsInterview ExperienceGCPSystem DesignMicroservices
How would you design a highly scalable and reliable application on GCP?
↑ 17 upvotes · 3 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCP
How would you monitor your application running in production on GCP?
↑ 10 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Hard
System Design round
5–8 YearsInterview ExperienceGCPDistributed SystemsSystem Design
If an entire zone becomes unavailable, how would you ensure no data loss?
↑ 16 upvotes · 2 engineers asked this · Senior SDE
LTIMindtree
Medium
Technical round
5–8 YearsInterview ExperienceGCPRedis
How would you reduce application load and downtime using caching strategies?
↑ 13 upvotes · 2 engineers asked this · Senior SDE
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GCP questions at each company
Frequently asked questions
Design Google Maps ETA calculation.
Design Google Maps ETA calculation.
How do you compute the fastest route for 1B+ users in real time? Cover: graph representation of road network, Dijkstra vs A* vs Contraction Hierarchies, live traffic data ingestion, and how you handle road closures.
Design Bigtable or a wide-column store from scratch. Explain SSTable, memtable, compaction strategies (size-tiered vs levelled), bloom filters for read optimisation, and how you handle tombstones for deletes.
Design Bigtable or a wide-column store from scratch. Explain SSTable, memtable, compaction strategies (size-tiered vs levelled), bloom filters for read optimisation, and how you handle tombstones for deletes.
How would you process and track real-time data in GCP?
How would you process and track real-time data in GCP?
How do you maintain security across GCP services?
How do you maintain security across GCP services?
What are Service Accounts in GCP, and when would you use them?
What are Service Accounts in GCP, and when would you use them?