Day 13 — 5 AI Tools Every Fresher Must Know

Knowing that AI tools exist is not enough. Every student knows about ChatGPT.

What separates students who get hired at product companies is knowing which tool to use for which task, and having real experience using them — not just having tried them once.

This is a practical guide. For each tool: what it does, when to use it, and what to actually do with it this week.

1. Cursor — AI Code Editor

What it is: A code editor that looks like VS Code but with AI built into every part of it. You can describe what you want in plain English and it writes the code, explains existing code, finds bugs, and refactors entire files.

Why it matters for your career: Product companies increasingly expect engineers to be faster than they were two years ago. Cursor is how fast engineers are fast. Knowing it well is a genuine skill on your resume.

How to use it:

• Ctrl+K — Inline edit. Select code, describe the change, it rewrites it.
• Ctrl+L — Chat. Ask questions about the codebase, explain errors, generate new files.
• Ctrl+Shift+L — Add file to context. "With this file as context, write a test for the login function."
• Tab — Autocomplete that understands what you are trying to do, not just what you typed.

This week: Download Cursor. Open your RAG project from Day 9. Ask it to add source citations to the answer display. See how it understands your existing code and suggests accurate changes.

Free tier: Generous. Enough for daily use as a student.

2. Claude — Best for Extended Thinking

What it is: Anthropic's AI assistant. Better than ChatGPT for extended reasoning, nuanced feedback, and tasks that require holding a lot of context.

Why it matters: Claude handles longer documents and more complex reasoning better than most alternatives. For placement prep — explaining complex OS or DBMS concepts, reviewing long answers, giving nuanced feedback on your STAR responses — Claude is the right tool.

How to use it:

• Use Projects to give Claude persistent context about your background. Create a project called "Placement Prep" and add your resume, skills, and target companies. Every conversation in that project remembers your context.
• Use it for mock interviews (Day 3 covered the exact prompts).
• Use it to explain code you don't understand — paste the code, ask it to explain what each section does and why.
• Use it for writing tasks — explaining your projects, drafting outreach messages, improving your bio.

This week: Create a Claude project. Add your resume as a file. Ask: "Based on my resume, what are my three strongest talking points for a TCS technical interview?"

Free tier: Works for most student use cases.

3. Perplexity — Research with Sources

What it is: An AI search engine that gives you synthesised answers with citations to actual sources, updated in real time.

Why it matters: When you need current information — TCS hiring criteria for 2025, what Infosys is actually paying freshers right now, which certifications are actually in demand — ChatGPT's training cutoff makes it unreliable. Perplexity searches the current internet and shows you the sources.

How to use it:

• "What are TCS's actual eligibility criteria for campus placements in 2025?"
• "What is the average fresher salary at Zoho in 2025?"
• "What certifications does AWS offer and which are most valued for freshers?"
• "What is the current interview process at Infosys for 2025 batch?"

Always check the sources it cites. Perplexity can still be wrong, but you can verify because it shows you where the information came from.

This week: Research your top 3 target companies using Perplexity. Find their current eligibility criteria, typical interview process, and salary. Write these down. This is your actual preparation material.

Free tier: Sufficient for research tasks.

4. v0 — UI Generation

What it is: Vercel's AI tool that generates React components from text descriptions. You describe a UI and it produces working code you can paste into your project.

Why it matters: Building a project is one thing. Making it look professional is another. v0 bridges this gap — it generates components that actually look good without you needing design skills.

How to use it:

Go to v0.dev. Describe a UI component:

• "A skills card for a developer portfolio. Shows skill name and level as a progress bar. Dark background, violet accent colour."
• "A timeline showing work experience. Each item has company, role, dates, and 2 bullet points. Clean minimal design."
• "A contact form with name, email, and message fields. Tailwind CSS. Minimal styling."

Copy the generated code. Paste it into your Next.js project. Adjust the content.

This week: Use v0 to redesign one section of your portfolio site from Day 8. Replace it with a v0-generated component. Notice how much better it looks and how little time it took.

Free tier: Limited generations per day, enough for a project.

5. n8n — Automation Without Full Code

What it is: A workflow automation tool. Connect apps and services together with a visual interface. When X happens, do Y. No backend code required for simple automations.

Why it matters: Automation is one of the most in-demand skills right now. n8n lets you build automations that used to require a backend developer. Understanding automation tools makes you immediately useful in any company.

Simple workflows you can build:

• "When I add a row to this Google Sheet, send me a WhatsApp message"
• "Every morning at 9am, check Naukri RSS feed for new fresher jobs and email me a summary"
• "When someone fills my contact form, save their details to Airtable and send them a confirmation email"

How to get started:

Go to n8n.io. Create a free cloud account. Click "New workflow." Drag in a trigger node — for example, "Schedule" to run every morning. Add an action node — "Send Gmail." Connect them. Done.

This week: Build one automation. The simplest: a daily email to yourself with motivational quote from an API. Takes 20 minutes and teaches you the entire concept.

Free tier: n8n cloud has a free tier. Self-hosting is also free and requires basic server knowledge.

Honest Assessment — Which to Learn First

If you have to pick one: Cursor. It makes every other technical task faster and it is a resume skill that product companies actually ask about.

If you want maximum placement impact: Claude for prep + Cursor for building + Perplexity for research. These three cover study, development, and fact-checking.

v0 and n8n are bonus skills. They differentiate you at the margin.

What to Say in Interviews

Interviewer: "What AI tools do you use in your work?"

Weak answer: "I use ChatGPT sometimes."

Strong answer: "I use Cursor as my primary code editor — it accelerates development significantly. I use Claude for extended reasoning tasks like code review and technical explanations because it handles more context than other tools. For research with current information I use Perplexity since it cites sources. I also built one automation using n8n — a daily job alert that fetches listings from an API and sends me a filtered summary. Each tool has a specific role in my workflow."

That answer is specific, shows genuine usage, and demonstrates that you think about tools intentionally rather than just using whatever is available.

Day 13 of 15 — AI Survival Kit for Engineers