Interview Prep - DSA, LLD and HLD

All-Inclusive Bundle: Everything you need for software development interviews.

Access to Essential Courses: This includes all three crucial courses: Data Structures and Algorithms (DSA), Low-Level Design (LLD), and High-Level Design (HLD).

Consistent Teaching Style: With Keerti Purswani as your instructor for all three courses, you can expect a consistent and engaging learning experience throughout.

Flexible Learning: You'll have unlimited access to recordings of live classes from all three courses. This means you can study at your own pace, whenever it suits you best. You will also get free access to future live batches for any of these three courses. That way, you can stay on top of the latest teachings and industry trends.

Join the Community: As part of the bundle, you'll also become a member of our supportive Discord community. Connect with fellow students, ask questions, and share insights—it's all about learning together!

Interactive Learning: Engage in interactive learning experiences, including hands-on exercises, coding challenges, group projects, and mock interviews, to reinforce your understanding and retention of key concepts.

Lifetime Access: Enjoy lifetime access to course materials, allowing you to revisit and reinforce your learning whenever you need to brush up on your skills or prepare for future opportunities.

Check out the details, such as curriculum and FAQ sections, for all three courses here-

DSA

(https://register.educosys.com/new-courses/3-dsa)

Week-wise Curriculum

Week 1

Recursion

• Basic Understanding

• Recursive Stack Visualization

• Head and Tail Recursions

• Backtracking

• Identifying Problems

• Time Complexity Analysis

• LIVE Problem Solving

 

Week 2

Dynamic Programming

• Dynamic Programming Basics

• Recursion to DP (Top-Down Approach)

• Iterative Solutions (Bottom-Up Approach)

• Space Optimization Techniques

• Time Complexity Analysis

• LIVE Problem Solving

 

Week 3

Advanced Dynamic Programming

• Gap Method

• Identifying Hard Problems

• Time Complexity Analysis

• LIVE Problem Solving

 

Week 4

Trees

• Basics of Trees

• Traversals

• Recursive Problems on Trees

• Binary Search Trees

• Time Complexity Analysis

• LIVE Problem Solving

 

Week 5

Graphs

• Basics of Graphs

• Traversals (BFS, DFS)

• Common Graph Algorithms

• Time Complexity Analysis

• LIVE Problem Solving

 

Week 6

Advanced Graphs

• Identifying Hard Problems

• Time and Space Complexity Analysis

• LIVE Problem Solving

• Interview Focused Problems

• Interview Prep Tips

Common FAQs for our DSA course:

 

What are the prerequisites for the course?

Any one programming language and basics of Arrays, Lists and Maps.

Is the course for absolute beginners?

Recursion, DP, Trees, and Graphs will be taught from basics to an advanced level. The fundamentals will be explained, followed by a lot of practice to help you approach and solve advanced-level questions but this is not for someone who is an absolute beginner in coding.

Which programming languages will be used for coding?

I will be coding in Java and C++. However, anyone familiar with any programming language should be able to follow along.

Will the code be provided?

Yes, in C++ and JAVA.

Is this course for freshers or for experienced people?

This course is for anyone aiming to master DSA. Years of experience doesn't matter.

 

LLD

(https://register.educosys.com/new-courses/22-lld-low-level-system-design-batch-2)

📆 5 weeks course
📚 Get lifetime access to recordings from all previous live batches
🔄 Join all future live sessions - no extra cost
🎯 Perfect for interviews - checkout testimonials

Week-wise Curriculum

Week 1: Principles, OOPs, and Design Patterns

• OOPs

• DRY & KISS Principles

• SOLID Principles in Detail

• Class UML Diagram

• Factory Design Pattern

• Abstract Factory Pattern

Week 2: Creational & Behavioral Design Patterns

• Singleton Design Pattern

• Builder Design Pattern

• Prototype Design Pattern

• Observer Design Pattern

• Command Design Pattern

• Chain of Responsibility Design Pattern

• Iterator Design Pattern

Week 3: Behavioral & Structural Design Patterns

• Strategy Design Pattern

• Template Design Pattern

• Adapter Design Pattern

• Decorator Design Pattern

• Bridge Design Pattern

• Composite Design Pattern

• Proxy Design Pattern

• Facade Design Pattern

Week 4: System Design Examples

• System Requirement Analysis

• IRCTC Design

• Chess Design

• Elevator Design

Week 5: Revision and Preparation

• Recommendation System Design

• Meeting Scheduler Design

• LLD Interview Tips

Common FAQs for our LLD course:

What are the prerequisites for the course?
Basic understanding of classes and objects in object-oriented programming.

Which programming languages will be used for coding?
I will be coding in Java and C++. However, anyone familiar with any object-oriented programming language should be able to follow along. That's what skilled software developers do.

How can I revise the concepts?
Notes and quizzes are available for every class.

Is this course for freshers or for experienced people?
This course is for anyone aiming to master LLD. Years of experience do not matter.

HLD

(https://register.educosys.com/new-courses/27-hld-high-level-system-design-batch-3)

📆 5 weeks course
📚 Get lifetime access to recordings from all previous live batches
🔄 Join all future live sessions - no extra cost
🎯 Perfect for interviews - checkout testimonials

Week-wise Curriculum

Week 1: Networking, Client and Server Protocols

• Client - Server Protocol

• Network Protocols

• Monolith & Microservices

• Websockets

• SSEs

• gRPC

Week 2: Servers, Scaling, Caching

• Latency

• Throughput

• Consistency

• Availability

• CAP Theorem

• Synchronous, Asynchronous

• PubSub (Kafka, RabbitMQ)

• Proxies

• Load Balancers

• Caching

• Service Routing

• Peer to Peer

Week 3: Storage, Databases, Migration, Indexing

• Data Storage

• SQL, NoSQL

• Specialised Storage Paradigms

• DB Migration

• Indexing

• Replication

• Sharding

• Consistent Hashing

• Horizontal, Vertical Scaling

Week 4: System Design, APIs, Security, Logging & Monitoring

• Capacity Estimation

• Polling & Streaming

• Configuration

• Rate Limiting

• Paging & Filtering

• Resiliency

• Failure & Fault Tolerance

• Logging & Monitoring

• API Design

• Security

Week 5: Revision and Preparation

• Chat App HLD (WhatsApp / Discord)

• YouTube HLD

• Uber HLD

• Stock Broker HLD (Zerodha / Upstox)

• Interview Prep Tips

Common FAQs for our HLD course:

What are the prerequisites for the course?

Internet connection and hunger for learning.

Are there any demos of different tech used in the industry?

There are around 10 demos of different tech used. The demos include Kafka, Redis, Neo4j, MongoDB, Cassandra, InfluxDB, MariaDB, and more.

How can I revise the concepts?

There are notes and quizzes for every class.

Is this course for freshers or for experienced people?

This course is for anyone who wants to master HLD. Years of experience does not matter.

FAQs

(Applicable to all courses on our website) 

Is this a Live or Recorded Course?

This course includes recordings from previous live batches. When you enroll, you get lifetime access to these recordings plus free entry into all upcoming live batches.

When will the next Live batch be launched?

The dates for the next live batch are yet to be finalized, but there is no need to wait - you can start learning immediately with full access to previous batch recordings! We are here to support you at every step.

What if I am interested in learning Live only?

We do not recommend delaying your learning - many of our learners have shared that watching the recordings feels just as effective as attending live sessions. That said, when you enroll, you also get access to all upcoming live batches, so you can join the next one as soon as it starts. In the meantime, you have lifetime access to previous batch recordings to start learning, revise, and build a strong foundation at your own pace.

Where can I ask you doubts?

The Discord community will always be active!

What language will the course be taught in?

Everything will be taught in English.

Do you have a mobile application?

We have a mobile application for both Android and iOS.

Can I watch the class recordings or go through notes offline?

You can download the recordings and notes on the mobile application and use them offline as per your convenience.

Do you provide a certificate for the course?

The certificate of completion is available once the live classes are over.

Can I get invoices for reimbursement?

Yes, a proper invoice with GSTIN is available as soon as you enroll in the course.