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Interview Prep for the tech you work with

One format for every topic: a short answer you can say out loud, the reasoning behind it, real code, the common mistake, and the follow-ups interviewers ask next.

Pick a topic

Topics

51 questionsSalesforceAdmin, Apex, triggers, SOQL, Lightning Web Components and integration.CRM7 parts6 questionsDockerImages and containers, Dockerfiles, layers, volumes, networking and Compose.DevOps3 parts6 questionsApache KafkaTopics and partitions, consumer groups, offsets, delivery guarantees and replication.Data and streaming3 parts
Coming soonJavaOOP, collections, concurrency, the JVM and memory, streams and modern Java features.Backend3 parts planned
Coming soonSpring BootAuto-configuration, dependency injection, REST APIs, JPA, security and testing.Backend3 parts planned
Coming soonKubernetesPods, deployments, services, config and secrets, scaling and troubleshooting.DevOps2 parts planned
Coming soonSQLJoins, indexes, window functions, transactions and query tuning.Data and streaming2 parts planned
Coming soonReactComponents, hooks, state, rendering, performance and testing.Frontend2 parts planned
Coming soonAWSEC2, S3, IAM, VPC, Lambda and choosing the right managed service.Cloud2 parts planned
Coming soonSystem DesignScaling, caching, queues, databases and how to talk through a design.Backend2 parts planned
Across every topic

Start with these

SalesforceWhat are governor limits, and why does Salesforce have them?BeginnerSalesforceWhat is the difference between a profile and a permission set?BeginnerSalesforceWhat is the order of execution when a record is saved?AdvancedSalesforceWhat is the difference between SOQL and SOSL?BeginnerSalesforceWhat is LWC, and how is it different from Aura?BeginnerSalesforceWhat integration options does Salesforce offer, and how do you choose?IntermediateSalesforceWhich per-transaction limits should you know by heart?BeginnerDockerWhat is the difference between an image and a container?BeginnerApache KafkaWhat are topics, partitions and offsets?Beginner
Every topic, the same format
  • A short answer you can say in 30 seconds
  • The explanation, with code and tables
  • The common mistake
  • The follow-up questions
  • Practice mode and a level filter