Technical interview preparation

Learn deeply. Practise deliberately.

StudyMate turns essential software-engineering subjects into structured notes, interview questions, and solution-led coding practice—from first principles to advanced interview discussions.

Browse subjectsSee the learning format
Concept-first ebooksBeginner to advancedInterview-focused practice
12essential subjects
3difficulty levels
Python + Csolution languages
4company preparation tracks
Complete preparation map

One library for the interview journey

Build core knowledge, connect related concepts, and practise the questions that reveal real engineering judgment.

PY

Python

Language fundamentals, object-oriented design, concurrency, testing and production patterns.

DE

Data Engineering

SQL, pipelines, warehouses, orchestration, streaming, quality and reliability.

DSA

Data Structures & Algorithms

Complexity, reusable problem-solving patterns, graphs, trees and dynamic programming.

AD

Android Development

Kotlin, Compose, architecture, persistence, background work and testing.

SD

System Design

Scalability, distributed systems, storage choices, resilience and design trade-offs.

DB

Database Systems

Indexes, transactions, isolation, query planning, replication and data modelling.

OS

Operating Systems

Processes, threads, memory, scheduling, concurrency and file systems.

CN

Computer Networks

TCP/IP, HTTP, DNS, routing, security and practical network diagnosis.

LLD

Object-Oriented & LLD

Design principles, patterns, modelling and maintainable low-level architecture.

SRE

Cloud, DevOps & SRE

Delivery pipelines, containers, observability, reliability and incident response.

BL

Behavioral & Leadership

Structured stories, ownership, conflict, impact and engineering leadership.

CR

Coding Round

Frequently asked problems, hints, approaches, complexity and complete solutions.

More than short answers

Engineering notes built for understanding

Each ebook follows a readable chapter structure so learners understand the theory before preparing an interview response.

BK

Concept-led ebooks

Move page by page through descriptive explanations written like practical engineering notes—not disconnected definitions.

  • Clear headings and connected concepts
  • Technical examples and code snippets
  • Design decisions and real-world trade-offs
  • Previous and next chapter navigation
QA

Interview question bank

Filter questions by subject, concept, and difficulty to focus a practice session on exactly what needs improvement.

  • Beginner foundations
  • Intermediate application questions
  • Advanced architecture and failure modes
  • Explanations designed for spoken answers
A repeatable study system

Prepare in three deliberate steps

Reading, retrieval, and solution review work together so knowledge becomes usable under interview pressure.

STEP 01

Learn the foundation

Read the ebook chapter, inspect its examples, and connect the idea to related engineering concepts.

STEP 02

Recall without prompts

Attempt level-appropriate questions and explain the answer as if speaking to an interviewer.

STEP 03

Compare and improve

Review the complete answer, identify missing trade-offs, and repeat until the reasoning is precise.

Coding-round workspace

From problem statement to a defensible solution

Practise high-value coding problems with constraints, hints, approaches, complexity analysis, and complete Python or C solutions.

Service companiesProduct companiesUnicornsDream companies
def longest_unique_window(text):
    last_seen = {}
    left = best = 0

    for right, char in enumerate(text):
        if char in last_seen:
            left = max(left, last_seen[char] + 1)
        last_seen[char] = right
        best = max(best, right - left + 1)

    return best

# Time: O(n)  Space: O(k)
Study with direction

Build depth before chasing answers.

StudyMate brings concepts, questions, and coding practice into one coherent preparation path.

Explore all subjects