Top Tech Interview Questions 2026

Updated yesterday · By SkillExchange Team

230

Open Positions

$122,324

Median Salary

18

Questions

Preparing for tech interviews in 2026 means navigating a booming job market with 230 open roles across top companies like Ninja Van, Carbonhealth, and Gopuff. Whether you're eyeing tech jobs remote, tech entry level jobs, or tech jobs near me, understanding tech hiring trends is key. Salaries are competitive, ranging from $1,000 to $240,000 USD with a median of $122,324, making roles like tech developer salary or tech manager salary highly attractive. The tech industry outlook remains strong, especially in best countries for tech jobs like the US, Canada, and emerging hubs in Europe and Asia.

Tech career paths offer flexibility, from tech freelance jobs to leadership positions with impressive tech salary guide figures. To land the best tech jobs, focus on tech skills in demand such as cloud computing, AI, and cybersecurity. Entry level tech salary starts around $60K-$90K, while experienced pros command much more. Knowing how to get tech job offers and how to negotiate tech salary can boost your outcomes significantly. Tech job requirements often emphasize practical problem-solving over rote memorization, so real-world scenarios in interviews are common.

This guide equips you with 18 targeted interview questions across beginner, intermediate, and advanced levels, complete with sample answers and tips. Whether you're a newbie hunting tech entry level jobs or a veteran eyeing tech manager salary, you'll find actionable advice. Dive into preparation tips, avoid common mistakes, and explore related skills to stand out in a crowded field. With tech designer salary and other niches paying well, now's the time to polish your pitch for tech freelance jobs or full-time gigs.

beginner Questions

What is the difference between HTTP and HTTPS?

beginner
HTTP stands for HyperText Transfer Protocol and is used for transferring data over the web without encryption. HTTPS adds a security layer with SSL/TLS encryption, protecting data in transit. In interviews for tech entry level jobs, explain that HTTPS uses port 443 versus HTTP's 80, and it's crucial for secure sites handling sensitive info like logins.
Tip: Relate it to real-world use: mention how browsers flag non-HTTPS sites as 'Not Secure' to show practical awareness.

Explain what Git is and its basic commands.

beginner
Git is a version control system for tracking code changes. Basic commands include git init to start a repo, git add . to stage files, git commit -m 'message' to save changes, and git push to upload to remote. For tech jobs near me, highlight branching with git branch and merging.
Tip: Practice a live demo; interviewers love seeing hands-on comfort with tools central to tech career paths.

What is an API?

beginner
An API (Application Programming Interface) lets software components communicate. For example, a weather app uses a weather API to fetch data. In tech freelance jobs, RESTful APIs use HTTP methods like GET/POST.
Tip: Use a simple analogy like ordering food via an app to make your explanation relatable.

Describe the box model in CSS.

beginner
The CSS box model consists of content, padding, border, and margin. Content is innermost, padding adds space around it, border surrounds padding, and margin provides external spacing. Total width = content + padding-left + padding-right + border-left + border-right + margin-left + margin-right.
Tip: Draw it on a whiteboard; visual aids shine in tech designer salary interviews.

What are the main data types in JavaScript?

beginner
Primitive types: string, number, boolean, null, undefined, symbol, bigint. Non-primitive: object (including arrays and functions). For best tech jobs, note typeof operator checks them.
Tip: Mention ES6 additions like symbol to show you're up-to-date with tech skills in demand.

How do you handle errors in Python?

beginner
Use try-except blocks: 
try:
    risky_code()
except ValueError as e:
    print(f'Error: {e}')
finally:
    cleanup()
This catches specific exceptions gracefully.
Tip: Emphasize specific exception handling over bare except for production-ready code in tech job requirements.

intermediate Questions

What is SQL injection and how to prevent it?

intermediate
SQL injection occurs when user input is unsanitized and injected into queries, e.g., ' OR 1=1--. Prevent with prepared statements or parameterized queries like in PDO: $stmt = $pdo->prepare('SELECT * FROM users WHERE id = ?');
Tip: Reference OWASP top 10; ties into cybersecurity, a hot tech hiring trends area.

Explain RESTful API principles.

intermediate
REST uses HTTP methods (GET, POST, PUT, DELETE) on resources via URLs. Stateless, uses JSON/XML, follows HATEOAS optionally. Status codes like 200 OK, 404 Not Found matter. For tech developer salary roles, design an endpoint example.
Tip: Discuss caching with ETags to demonstrate optimization knowledge.

What is Docker and its benefits?

intermediate
Docker containerizes apps for consistent environments. Benefits: portability, scalability, isolation. Dockerfile example: 
FROM node:14
COPY . /app
RUN npm install
CMD ['npm', 'start']
Key for tech jobs remote teams.
Tip: Contrast with VMs: containers share host kernel, lighter weight.

Describe Agile methodology.

intermediate
Agile is iterative development with sprints, daily standups, retrospectives. Scrum uses product backlog, sprint backlog. Kanban visualizes workflow. Aligns with tech industry outlook for fast delivery.
Tip: Share a personal story from a project to make it authentic.

How does a binary search tree work?

intermediate
BST: left child < parent < right child. Search: compare root, recurse left/right. Time: O(log n) average. Insert/delete similar. Balance with AVL for worst-case.
Tip: Walk through inserting 5,3,7,2,4 verbally or on paper.

What is React's Virtual DOM?

intermediate
Virtual DOM is a lightweight JS object mirroring real DOM. React diffs it against previous version (reconciliation), updates only changed nodes. Boosts performance in SPAs.
Tip: Mention hooks like useState for state-driven re-renders in modern apps.

advanced Questions

Design a URL shortener service.

advanced
Use base62 encoding for short codes (e.g., hash ID). DB: long_url, short_code, counter. API: POST /shorten, GET /{code} redirects. Handle collisions with retries. Scale with sharding, cache redirects. For tech manager salary, discuss metrics like uptime.
Tip: Cover edge cases: expiration, analytics, rate limiting.

Explain microservices vs monolith.

advanced
Monolith: single deployable unit, simple but scales poorly. Microservices: independent services, scalable, polyglot, but complex networking/observability. Use saga pattern for distributed transactions. Tech freelance jobs often involve migrating to microservices.
Tip: Reference Netflix or Amazon as real-world examples.

What is Kubernetes and core concepts?

advanced
K8s orchestrates containers: Pods (smallest unit), Deployments (replicas), Services (exposure), ConfigMaps/Secrets. kubectl apply -f deployment.yaml. Autoscaling via HPA.
Tip: Discuss Istio for service mesh in enterprise tech career paths.

Implement LRU Cache.

advanced
class LRUCache {
  constructor(capacity) {
    this.capacity = capacity;
    this.cache = new Map();
  }
  get(key) {
    if (this.cache.has(key)) {
      const val = this.cache.get(key);
      this.cache.delete(key);
      this.cache.set(key, val);
      return val;
    }
    return -1;
  }
  put(key, value) {
    if (this.cache.has(key)) this.cache.delete(key);
    else if (this.cache.size >= this.capacity) this.cache.delete(this.cache.keys().next().value);
    this.cache.set(key, value);
  }
}
O(1) ops with HashMap + DLL.
Tip: Explain doubly linked list for eviction; Java has built-in LinkedHashMap.

How would you optimize a slow database query?

advanced
Profile with EXPLAIN. Add indexes on WHERE/JOIN/GROUP BY. Rewrite queries (avoid SELECT *). Denormalize if read-heavy. Shard/partition large tables. Cache with Redis. Monitor with slow query log.
Tip: Quantify: 'Reduced query time from 5s to 50ms' sells impact.

Discuss CI/CD pipeline best practices.

advanced
Pipeline: build, test (unit/integration), scan (SAST/DAST), deploy to staging/prod. Tools: Jenkins/GitHub Actions. Blue-green/c Canary for zero-downtime. IaC with Terraform. Security: shift-left. Aligns with how to get tech job in DevOps.
Tip: Mention GitOps for declarative deploys.

Preparation Tips

1

Practice coding on LeetCode/HackerRank daily, focusing on tech skills in demand like algorithms and system design for best tech jobs.

2

Build a portfolio project showcasing full-stack work; crucial for tech entry level jobs and tech freelance jobs.

3

Research company tech stack via Glassdoor/LinkedIn; tailor resume to tech job requirements.

4

Mock interview with Pramp or friends; record to refine how to negotiate tech salary discussions.

5

Stay current on tech hiring trends like AI ethics via newsletters; mention in behavioral questions.

Common Mistakes to Avoid

Rambling answers without structure; use STAR method for behavioral questions.

Ignoring soft skills; tech manager salary roles need leadership examples.

Not asking questions; inquire about tech industry outlook or team challenges.

Neglecting follow-ups; send thank-you emails recapping a key discussion.

Overlooking salary research; use levels.fyi for tech salary guide benchmarks.

Related Skills

Cloud Computing (AWS/Azure)DevOps (CI/CD, Terraform)Data Structures & AlgorithmsFrontend (React/Vue)Backend (Node/Python/Go)System DesignCybersecurity BasicsSoft Skills (Communication)

Top Companies Hiring Tech Professionals

Ninja Van (11)Carbonhealth (11)Octoenergy (8)Gopuff (7)Gojob (7)Vestiairecollective (6)Veepee (6)Yuno (5)AMIRI (5)Younited (4)

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Frequently Asked Questions

What are current tech hiring trends in 2026?

AI/ML integration, remote-first teams, and sustainability focus. Tech jobs remote dominate with hybrid models.

How much is entry level tech salary?

Typically $60K-$90K USD, varying by location and role. Check tech salary guide for specifics.

What are the best countries for tech jobs?

US (Silicon Valley), Canada (Toronto), Germany (Berlin), Singapore, and India lead.

How to get tech job with no experience?

Bootcamps, open-source contributions, internships. Target tech entry level jobs via Indeed/LinkedIn.

How to negotiate tech salary?

Research market rates, highlight value, consider equity/benefits. Aim 10-20% above offer.

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