Free Interview Questions API
The Interview Questions API provides categorized, peer-reviewed interview questions ranging from standard behavioral inquiries to complex algorithmic challenges. This API is the perfect backend for interview prep applications, mock interview simulators, and technical screening platforms.
What is a REST API?
An API (Application Programming Interface) allows two software programs to communicate. A REST API uses standard HTTP requests like GET (to read data), POST (to create data), PUT (to update), and DELETE (to remove).
When you send a request to our https://techidea.online/api/v1/interview-questions endpoint, our server responds with a JSON (JavaScript Object Notation) array containing data. You can then display this data in your frontend React, Next.js, or mobile applications.
Developer Features
Pagination
Use ?limit=10&page=2
Filtering
Use ?search=keyword
Sorting
Use ?sort=id&order=asc
Code Examples
import { useState } from 'react';
export default function Flashcard() {
const [question, setQuestion] = useState(null);
const getQuestion = async () => {
const res = await fetch('https://api.example.com/v1/interview-questions/random');
const data = await res.json();
setQuestion(data);
};
return (
<div>
<button onClick={getQuestion}>Get Random Question</button>
{question && <h3>{question.text}</h3>}
</div>
);
}Sample Response
{
"id": "q_1002",
"category": "Algorithms",
"difficulty": "Medium",
"text": "How do you detect a cycle in a linked list?",
"hints": [
"Think about using two pointers.",
"What happens if one pointer moves faster than the other?"
],
"answer_summary": "Use Floyd's Cycle-Finding Algorithm (Tortoise and Hare). Maintain two pointers, slow and fast. If they meet, there is a cycle."
}Key Features
High Availability
99.9% uptime guaranteed via global CDN edge nodes.
Standardized Output
Predictable, strictly typed JSON schemas for easy integration.
No Rate Limits for Dev
Test endlessly in your local environment without hitting a paywall.
Authentication Guide
Setup
To access this endpoint, no authentication is currently required for the free tier. For higher limits, include your API key in the Authorization header: `Authorization: Bearer YOUR_API_KEY`.
Security Notes
Never expose your production API key in client-side code (like React or Vue). Always proxy requests through a backend server or Next.js server actions.
Response Fields Explained
| Field | Explanation |
|---|---|
| status | Indicates the success or failure of the request ('success' or 'error'). |
| results | The main array containing the requested data objects. |
Common Errors & Fixes
401 Unauthorized
Missing or invalid API key.
Fix: Check your Authorization header spelling and ensure your key is active.
429 Too Many Requests
Rate limit exceeded.
Fix: Implement exponential backoff or upgrade your plan.
404 Not Found
The requested resource or endpoint does not exist.
Fix: Check the spelling of the endpoint URL and resource ID.
Best Practices
Implement Caching
Cache responses for 15-60 minutes in Redis or via Next.js ISR to significantly reduce API calls and latency.
Use Pagination
Always use `?limit=X&page=Y` to request only the data you need to render the current view.
Pricing Limits
1,000 requests/month, standard community support, public data only.
Starts at $49/mo for 100,000 requests, real-time data, and SLA.
Free tier is limited to 60 requests per minute per IP.
Top Alternatives
RapidAPI Directory
A massive alternative marketplace for generic endpoints, though quality varies wildly.
Postman Mock Servers
Good if you want to manually design your own mock responses instead of using our pre-built datasets.
Real-World Use Cases & Tutorials
Mock Interview Simulator
A web application that simulates a real technical interview environment, prompting users with questions and allowing them to write code or record video answers.
Implementation Steps
- 1. Build a Next.js frontend with an integrated code editor (e.g., Monaco Editor).
- 2. Fetch random technical questions from the API based on the user's selected difficulty and language.
- 3. Implement a timer to add realistic interview pressure.
- 4. Create a grading criteria rubric alongside the API's provided optimal answers.
- 5. Allow users to save their sessions and track improvement over time.
Daily Prep Newsletter Service
An automated service that sends subscribers a daily interview question tailored to their target role.
Implementation Steps
- 1. Set up a Node.js backend with a cron job scheduling system.
- 2. Maintain a database of user preferences (e.g., frontend, backend, data science).
- 3. Query the Interview Questions API daily for a new, unseen question for each user cohort.
- 4. Integrate with an email API like SendGrid to dispatch the daily question.
- 5. Include a link in the email to view the detailed solution on your platform.
Frequently Asked Questions
Are there code snippets included in the answers?
Yes, for technical and algorithmic questions, the API payload often includes an 'example_code' field containing a reference implementation.
Can I filter questions by specific companies?
Absolutely. You can use the 'company' parameter to retrieve questions that have been frequently asked at companies like Google, Meta, or Amazon.
Continue Learning
Use these resources to deepen your understanding of API integration and build portfolio-worthy projects.