Questions on specific technologies, from networking to Kubernetes, and how the technical rounds themselves work: live coding, take-home assignments, system design and AI-assisted coding interviews.
40 articles
Artificial intelligence interview questions with short answers checked against Google, NIST, OWASP, the OECD and the original papers: what AI is, AI vs machine learning vs deep learning, types of learning, how large language models work, embeddings, hallucinations, RAG, agents, prompt injection, bias, trustworthy AI, and the AI skills questions now asked in every kind of job.
Machine learning interview questions with answers checked against Google's Machine Learning Crash Course, scikit-learn's documentation and the original papers: bias and variance, overfitting, regularization, cross-validation, data leakage, metrics, imbalanced data, trees and ensembles, deep learning, models in production, two coding exercises we ran, and a worked ML system design.
AWS interview questions with answers, checked against AWS documentation: Regions and Availability Zones, shared responsibility, the Well-Architected Framework, IAM, EC2 and load balancers, S3, EBS and EFS, VPC networking, Lambda, ECS, EKS and Fargate, RDS, Aurora and DynamoDB, SQS, SNS and EventBridge, CloudWatch and CloudTrail, disaster recovery, cost, scenario questions, and what changed in 2025 and 2026.
C# interview questions with answers and code, checked against Microsoft's documentation: value and reference types, boxing, strings, classes, structs and records, interfaces, ref and out, nullable reference types, LINQ and deferred execution, async and await, garbage collection, IDisposable, Span, exceptions, thread safety, dependency injection lifetimes, EF Core, what's new in C# 13, 14 and 15, output puzzles and coding exercises with solutions.
Microservices interview questions with answers, checked against primary sources: monolith vs microservices, service boundaries and database per service, REST vs gRPC, API gateways, service discovery and service mesh, sagas, the transactional outbox, idempotent consumers, event sourcing and CQRS, circuit breakers, retries with jitter, bulkheads, tracing and health probes, deployment strategies, contract testing, security, Spring Cloud today, and scenario questions.
Power BI interview questions with answers and DAX examples, checked against Microsoft's documentation: reports and dashboards, Power Query and query folding, star schema and relationships, measures and calculated columns, row and filter context, CALCULATE, time intelligence, Import, DirectQuery, Dual and Direct Lake, incremental refresh, row-level security, performance, deployment pipelines, and scenario questions.
Angular interview questions with answers checked against angular.dev and the Angular team's release posts: components and standalone, templates and control flow, signals (computed, effect, linkedSignal, resource), change detection with OnPush and zoneless, dependency injection with inject() and @Service, RxJS, routing and guards, Signal Forms, HTTP, @defer and SSR, testing with Vitest, what changed in Angular 21 and 22, output puzzles and coding exercises.
Data analyst interview questions with answers, SQL and pandas code you can run, and case-study frameworks: the interview stages, SQL window functions for growth, ranking, deduplication and retention, Excel lookups and pivot tables, Python and pandas 3, Power BI and DAX, statistics, p-values and A/B tests, Simpson's paradox, metrics and product sense, data cleaning, visualization, case studies, and behavioral questions.
Java interview questions with answers and code, checked against the Java Language Specification, the JDK documentation and openjdk.org: JDK vs JRE vs JVM, pass-by-value, == vs equals, the equals and hashCode contract, strings, OOP, records and sealed classes, exceptions, collections and how HashMap works, streams, synchronized, volatile and virtual threads, garbage collection, what's new from Java 21 to Java 27, output puzzles and coding exercises with solutions.
Node.js interview questions with answers checked against the Node.js documentation and release notes: the event loop and its phases, process.nextTick vs setImmediate, the libuv thread pool, async patterns and error handling, EventEmitter, streams and backpressure, CommonJS vs ES modules and require(esm), worker threads vs cluster, Express 5, security, debugging, the built-in test runner, TypeScript type stripping, Node 22, 24 and 26, output puzzles and coding exercises.
Python interview questions with answers and code, checked against the Python documentation and FAQ: mutability, copying and hashing, functions, closures and decorators, generators and context managers, classes, MRO and dataclasses, exceptions, the GIL, threads vs processes vs asyncio, the free-threaded build, type hints, performance, testing and tooling, what's new in Python 3.14 and 3.15, output puzzles and coding exercises with solutions.
Spring Boot interview questions with answers and code, checked against the Spring reference docs and release notes: dependency injection and bean scopes, @SpringBootApplication and auto-configuration, starters and externalized configuration, REST controllers, validation and ProblemDetail errors, Spring Data JPA and the N+1 problem, @Transactional pitfalls, Spring Security, testing with @WebMvcTest and @MockitoBean, Actuator, virtual threads, what changed in Spring Boot 4 and Spring Framework 7, and production scenario questions.
SQL interview questions with answers and runnable queries, checked against the PostgreSQL and SQL Server documentation: the order a query runs in, joins and the LEFT JOIN trap, NULLs and NOT IN, GROUP BY and HAVING, subqueries and recursive CTEs, window functions (ROW_NUMBER, RANK, DENSE_RANK, LAG, running totals), indexes and EXPLAIN, transactions and isolation levels, database design, dialect differences, and eight practice problems with solutions.
Front-end developer interview questions with answers checked against MDN, web.dev and the W3C: semantic HTML, script loading and accessibility (WCAG 2.2), the CSS box model, specificity and Flexbox vs Grid, JavaScript closures, the event loop and event delegation, browser performance and Core Web Vitals, security, front-end system design, coding exercises, and questions for junior and senior roles.
JavaScript interview questions with answers checked against MDN and TC39: types and coercion, equality, hoisting and the temporal dead zone, closures, this, prototypes and classes, the event loop and async/await, promise combinators, Map, Set and structuredClone, modules, what ES2023 to ES2026 added, output-prediction puzzles with explanations, and coding exercises with solutions (debounce, throttle, Promise.all, curry, memoize).
TypeScript interview questions with answers checked against the TypeScript handbook, the TypeScript team's release posts and the Node.js docs: type vs interface, any, unknown and never, structural typing, narrowing and discriminated unions, generics and constraints, keyof, mapped and conditional types, utility types, satisfies, enums vs unions, tsconfig and strict mode, TypeScript 6.0 and 7.0 (the native Go compiler), running TypeScript in Node.js, TypeScript with React, type puzzles and utility-type exercises.
React interview questions with answers checked against the official React docs: rendering and the 'virtual DOM' question, components and state, the Rules of Hooks, useEffect and when you don't need it, keys, performance and the React Compiler, React 19 (Actions, useActionState, use, Server Components), 19.2 and 19.3, error boundaries, senior scenario questions and behavioral questions.
Snowflake interview questions with short answers from the Snowflake documentation: the architecture (storage, compute and cloud services), virtual warehouses and scaling, micro-partitions and clustering, Time Travel and Fail-safe, zero-copy cloning, loading data, semi-structured data, security, cost control, and scenario-based questions for experienced data engineers.
Kubernetes interview questions with answers, from basics to experienced: cluster architecture (control plane and nodes), Pods, Deployments and rolling updates, StatefulSets, DaemonSets and Jobs, Services and Ingress, ConfigMaps and Secrets, storage, probes, resource requests and limits, autoscaling, scheduling, RBAC and network policies, Helm and GitOps, troubleshooting scenarios (CrashLoopBackOff, Pending, ImagePullBackOff, OOMKilled) with kubectl commands, and experienced-level questions.
Unix and Linux interview questions with answers: Unix vs Linux, the kernel and shell, the file system, permissions (chmod, umask, setuid, sticky bit), processes and signals, essential commands (find, grep, sed, awk, xargs), pipes and redirection, hard vs soft links, shell scripting, cron, networking commands, one-liner exercises, and troubleshooting scenarios such as a full disk or high CPU.
Web API interview questions with short answers: REST principles, HTTP methods with safe and idempotent semantics (RFC 9110), status codes (401 vs 403, 409, 429), versioning, pagination, authentication with OAuth 2.0 and JWT, the OWASP API Security Top 10, ASP.NET Core Web API (controllers, [ApiController], minimal APIs), performance, and scenario questions for experienced developers.
Jenkins interview questions with short answers from the Jenkins documentation: pipeline as code and the Jenkinsfile, declarative vs scripted pipelines, the controller and agents, stages, post conditions, when, parallel and matrix, shared libraries, credentials and security, plugins, scaling, and scenario questions for experienced DevOps engineers.
Which companies now let you use AI in coding interviews (Meta, Google, Canva), what those rounds look like, what interviewers score, and how to prepare, plus what to do when AI isn't allowed.
DevOps engineer interview questions with short answers: CI/CD pipelines, deployment strategies, infrastructure as code, containers and Kubernetes, monitoring and observability, DORA's software delivery metrics, incident response, security in the pipeline, cloud cost, and scenario questions.
Python interview questions for junior developers and freshers with short answers and code: data types, mutability, lists vs tuples, dictionaries, the mutable default argument trap, comprehensions, functions, classes, exceptions, generators, common coding exercises, and how to prepare.
SAS interview questions with short answers and code: the DATA step and PROC steps, libraries, SET and MERGE, WHERE vs IF, how SAS stores dates, RETAIN and FIRST./LAST., INPUT vs PUT, PROC SORT, PROC TRANSPOSE, PROC SQL, macros, debugging, and what the Base Programming certification covers.
Hadoop interview questions with short answers from the Apache Hadoop documentation: HDFS architecture (NameNode, DataNodes, blocks, replication and rack-aware placement, heartbeats, safemode, FsImage and EditLog), YARN (ResourceManager, NodeManager, ApplicationMaster), MapReduce (shuffle, sort, combiners), the small files problem, the ecosystem, and scenario questions for developers and administrators.
Apache Kafka interview questions with short answers: events, topics and partitions, ordering, consumer groups and offsets, replication and in-sync replicas, delivery semantics, producer settings, retention and compaction, performance tuning, and scenario questions for experienced engineers.
Apache Spark interview questions with short answers and PySpark code: RDDs vs DataFrames, transformations and actions, lazy evaluation, the driver and executors, narrow vs wide transformations and shuffles, partitioning, caching, joins and data skew, Spark SQL and the optimizer, Structured Streaming, and performance tuning scenarios.
.NET Core and ASP.NET interview questions with short answers: .NET versions and support (LTS and STS), the runtime, C# essentials, ASP.NET Core middleware, dependency injection lifetimes, configuration, classic ASP.NET vs ASP.NET Core, MVC, Razor Pages and Blazor, model binding and filters, Entity Framework Core, async, testing, and senior-level design questions.
C++ interview questions with short answers and code: pointers vs references, the stack and heap, RAII, smart pointers (unique_ptr, shared_ptr, weak_ptr), the rule of zero and five, move semantics, virtual functions and destructors, const, templates, the STL, undefined behavior, and concurrency, with rules from the C++ Core Guidelines.
SSIS (SQL Server Integration Services) interview questions with short answers: control flow vs data flow, containers and precedence constraints, Lookup cache modes, blocking transformations, error handling, slowly changing dimensions, incremental loads, performance tuning, the SSISDB catalog and deployment, plus scenario questions for experienced developers.
Java 8 interview questions with short answers and code: lambdas, functional interfaces, method references, default methods, the Stream API (map, filter, reduce, collect, groupingBy), intermediate vs terminal operations, parallel streams, Optional, the java.time API, CompletableFuture, plus why Java 8 still comes up in 2026.
Splunk interview questions with short answers: forwarders, indexers and search heads, the data pipeline, indexes and buckets, SPL (stats, eval, timechart, rex, lookups), stats vs transaction, knowledge objects, search performance, troubleshooting missing data, and questions for SOC analysts, admins and developers.
How to approach a take-home assignment for coding, data, product or case study interviews: clarify the scope, timebox, what reviewers look for, how to write the README, how to present it in the follow-up interview, and when to push back.
How system design interviews work, what interviewers look for (from Meta's and Amazon's own guides), a six-step framework with a worked example, the core concepts to know, common questions, and how to use AI tools to practice without fooling yourself.
How to prepare for and pass a HackerRank coding test: how the platform works (from HackerRank's candidate FAQs), hidden test cases, proctoring, the common problem patterns, a timeboxing plan, and what to do when you're stuck.
How to answer “Tell me about a time you solved a complex problem” and other problem-solving interview questions, with the STAR structure, sample answers for IT and non-technical roles, how to explain something complex simply, and mistakes to avoid.
What a CoderPad interview looks like, how to practice in the free sandbox, how its AI Assist works when an interviewer turns it on, and how to talk through code so the interviewer can follow.
45 networking interview questions with short, accurate answers: fundamentals, subnetting, switching, routing, security and troubleshooting scenarios, for network engineer, admin and IT support interviews.
