Tech Interview Preparation: DSA, LLD & Core CS
Tech Interview Preparation is a 10-week course covering data structures and algorithms, object-oriented design and low-level design, core CS subjects (OS, networks, DBMS), SQL, and aptitude, capped with mock interviews and resume review. It's built for students and developers preparing for software engineering interviews, not for learning a language from scratch.
Prepare for software engineering interviews with a structured path through data structures, algorithms, low-level design, core CS subjects, and real mock-interview practice.
What you'll learn
Course details
Duration
10 weeks
Best for
Students and developers preparing for software engineering interviews
Enrollment isn't open for this course yet — check back soon or contact us.
Course Curriculum
A module-by-module breakdown of what you'll cover in Tech Interview Preparation: DSA, LLD & Core CS.
01Getting Started & Environment Setup
3 topicsWeeks 1–2
- Choosing a primary interview language (Python, Java, or C++) and sticking with it
- Setting up a coding practice environment and a problem-tracking sheet
- Understanding the interview process end-to-end: rounds, timing, and what's evaluated
02Basic
4 topicsWeek 3
- Time and space complexity: Big-O analysis in practice
- Arrays, strings, and hashing: the patterns interviewers reuse constantly
- Two pointers, sliding window, and prefix sums
- Linked lists: reversal, cycle detection, and common pitfalls
03Intermediate
5 topicsWeeks 4–5
- Trees and binary search trees: traversals and common interview questions
- Heaps, priority queues, and top-K problems
- Graphs: BFS, DFS, shortest paths, and topological sort
- Sorting and searching deep dive, including binary search variants
- Recursion and backtracking patterns
04Advanced
5 topicsWeeks 6–7
- Dynamic programming: recognizing and structuring DP problems
- Greedy algorithms and when greedy actually works
- Object-oriented design and the SOLID principles
- Design patterns interviewers actually ask about (Factory, Singleton, Observer, Strategy)
- Low-level design case studies: parking lot, elevator system, ticket booking
05Pro
6 topicsWeek 8
- Core CS for interviews: processes, threads, and memory management
- Core CS for interviews: networking and HTTP fundamentals
- Core CS for interviews: database normalization, transactions, and indexing
- SQL for interviews: joins, window functions, and query optimization
- Aptitude and reasoning: quantitative and logical practice
- Resume building and a mock-interview feedback loop
06AI Pro
3 topicsWeeks 9–10
- Using Claude, ChatGPT, and Perplexity to run mock interviews and get structured feedback
- Verifying AI-suggested complexity analysis and solutions before trusting them
- Project: A complete AI-assisted mock-interview cycle with a self-review checklist
Tools & Technologies
Hands-on practice with the same tools used by working professionals.
Real-Time, Industry-Based Projects
This is project-based learning modeled on real industry scenarios — you'll build portfolio-ready work as you go, not just watch lectures.
Every course includes a guided internship on top of your project work — so you graduate with real experience, not just a certificate.
Communication & Soft Skills
Built into every course, alongside the technical curriculum.
Communication Skills
Practice explaining technical work clearly to teammates, managers, and clients.
Practical AI Skills
Hands-on training in using AI tools well — prompting, everyday workflows, and where AI actually helps versus where it doesn't.
Teamwork & Collaboration
Work in small project teams using real workflows like stand-ups and code reviews.
Problem Solving
Build the habit of breaking down ambiguous problems into clear, solvable steps.
Time Management
Learn to plan, prioritize, and deliver project work against realistic deadlines.
Presentation Skills
Present your project work and results with confidence, as you would to a client.
Resume & Profile Building
Build a strong resume, LinkedIn profile, and project portfolio that recruiters notice.
Interview Preparation
Mock interviews and portfolio reviews to get you ready for real job applications.
Career & Placement Support
Students enrolled in Tech Interview Preparation: DSA, LLD & Core CS get access to these placement-support tools and guidance. This is support and preparation, not a guaranteed job outcome.
Resume Builder
A resume auto-built from your real completed projects and certificates, ready to export.
Shareable Portfolio
A public portfolio page showcasing your approved projects, with a link you can share with employers.
Interview Preparation
Guidance on presenting your projects and experience clearly in real interviews.
Peer & Mentor Community
Ongoing access to our learner community for questions, feedback, and support after you finish.
What Your Certificates Look Like
Real, verifiable certificates with your name, Tech Interview Preparation: DSA, LLD & Core CS, and a QR code anyone can scan to confirm they're genuine — one for completing the course, and a separate one if you take the internship track. Certificates are included with Live and Recorded enrolments. For free courses, self-paced courses and internship tracks, earning a certificate is free and there's a one-time ₹100 fee to release it for viewing, download and sharing.
Course Completion Certificate
Data24ZoneCertificate of Completion
Illustrative recipient
Your Name Here
Example certificate for completion of
Tech Interview Preparation: DSA, LLD & Core CS
- Certificate No.
- D24-SAMPLE
- Mode
- Self-Paced
- Duration
- 10 weeks
- Example issue date
- On completion
Sample only — not a real, issued certificate.
Verification is available only on issued certificates.
Internship Completion Certificate
Data24ZoneCertificate of Internship
Illustrative recipient
Your Name Here
Example certificate for completion of
Tech Interview Preparation: DSA, LLD & Core CS
- Certificate No.
- D24-SAMPLE
- Mode
- Internship
- Duration
- 10 weeks
- Example issue date
- On completion
Sample only — not a real, issued certificate.
Verification is available only on issued certificates.
Frequently Asked Questions
What will I learn in the Tech Interview Preparation: DSA, LLD & Core CS course?
You'll learn: Data structures and algorithms with interview-style problem patterns; Object-oriented design, SOLID principles, and low-level design case studies; Core CS subjects (OS, networks, DBMS) and SQL as interviewers actually ask them; A complete mock-interview and resume-review cycle.
What tools and technologies does the Tech Interview Preparation: DSA, LLD & Core CS course cover?
This course covers: Python / Java / C++, SQL, Claude / ChatGPT, Perplexity.
Is the Tech Interview Preparation: DSA, LLD & Core CS course beginner-friendly?
This is a intermediate-level course, so it assumes some prior familiarity with the subject. It starts with a "Getting Started & Environment Setup" module covering tool installation before the main curriculum.
How long does the Tech Interview Preparation: DSA, LLD & Core CS course take to complete?
The course is designed to be completed in approximately 10 weeks, depending on your pace.
What enrollment options are available for Tech Interview Preparation: DSA, LLD & Core CS?
Project Training Track (₹1,499) — One defined learning project and 2 review sessions; no employment or stipend included. Self-Paced (₹1,499) — Learn anytime with the full recorded curriculum and community access.
Is there an internship option for Tech Interview Preparation: DSA, LLD & Core CS?
Yes — the Internship track means working through real projects with our team and earning a separate Internship Certificate.
Will I get a certificate after completing Tech Interview Preparation: DSA, LLD & Core CS?
Yes. Self-paced enrollment earns a course completion certificate once your final project is reviewed and approved. Internship enrollment earns an internship certificate once your internship projects are approved. Every certificate is publicly verifiable on our website and can be added directly to your LinkedIn profile. Earning a certificate is free and releasing it to view, download and share is a one-time ₹100 fee per certificate.
What kind of projects will I build in Tech Interview Preparation: DSA, LLD & Core CS?
You'll work on real projects such as: A solved problem set covering every core DSA pattern, with complexity analysis documented; A low-level design write-up for a real case study (e.g. parking lot or ticket booking); A reviewed, ATS-friendly resume and a recorded mock-interview self-assessment.
Is placement support included with Tech Interview Preparation: DSA, LLD & Core CS?
Yes — every enrolled student gets full access to our placement support: resume building, a shareable project portfolio, mock interview preparation, and guidance applying what you've built to real job applications. This is support and access, not a guaranteed job outcome — how quickly it leads to an offer depends on the market and your own effort.
