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Phase 7 • Week 35

HLD Practice Problems continue (Core CS), specialization checkpoint (AI/ML), Testing (Java Backend)

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Weekly Production Deliverable

Target Output
Deliverable — end of Phase 7 checkpoint:
DSA: 100% of the Striver A2Z sheet, cold-tested end to end.
Core CS: LLD 100% done. SQL+DE Foundations.md and DBMS.md 100% done. HLD: 6 of 17 practice problems done this phase (9 total), 8 remaining.
AI/ML: NLP/LLM specialization underway — Hugging Face LLM Course done, fine-tuned LoRA model shipped, advanced RAG measured with RAGAS, evaluated agent shipped.
Java Backend: Fully layered, persisted (Postgres + Flyway), secured (JWT + RBAC), and tested (JUnit 5 + Mockito + Testcontainers) Spring Boot REST API.
Weeks: W31 W32 W33 W34 W35 Active

Monday

0 / 2 done
DSA Light maintenance
1 mixed problem, any topic
1.5h
AI/ML Research Paper: LoRA
Read the original paper: "LoRA: Low-Rank Adaptation of Large Language Models" (Hu et al., arxiv.org/abs/2106.09685) — read cold, connecting mathematical rank formulas to PEFT code
2.5h

Tuesday

0 / 2 done
DSA 1 mixed problem
1.5h
CORE HLD Practice Problems 1
System Design of Tinder (Geohashing, matching algorithm, profile caching) & System Design of TikTok (Video ingestion, CDN distribution, recommendation feed)
2.5h

Wednesday

0 / 2 done
DSA 1 mixed problem
1.5h
AI/ML LoRA Paper Breakdown & Reflection
Connect LoRA's mathematical properties (intrinsic dimensionality, matrix rank r, zero inference latency overhead) to your Week 32 fine-tuning results
2.5h

Thursday

0 / 2 done
DSA 1 mixed problem
1.5h
CORE HLD Practice Problems 2
System Design of an Online Coding Judge (Part 1 & 2: Sandboxing, code execution isolation, judge worker queues) & System Design of UPI Payments
2.5h

Friday

0 / 2 done
DSA 1 mixed problem
1.5h
AI/ML Phase 7 AI Synthesis
Write comprehensive notes comparing LoRA, full fine-tuning, RAG, and agentic workflows; explain when you'd reach for each in an enterprise setting
2.5h
Weekend High-Load Execution • 8.0h Daily Deep Focus Lab

Saturday

0 / 3 done
DSA Contest
1.5h
AI/ML Phase 7 NLP/LLM Capstone Defense (4.0h)
Deliver full demonstration of fine-tuned model and re-ranked RAG pipeline; explain PEFT and low-rank matrices out loud.
4.0h
JAVA Testing Fundamentals with JUnit 5 & Mockito
Why test; JUnit 5 lifecycle (@Test, assertions, @BeforeEach); Mockito: @Mock, @InjectMocks, stubbing methods, verifying interactions; unit test the Service layer
2.5h

Sunday

0 / 3 done
DSA Full weekly revision
1.5h
AI/ML Spring Boot + AI Architecture Review (4.0h)
Architecture review: connecting Spring Boot 3.x REST controllers with remote Python AI inference microservices.
4.0h
JAVA Integration Testing with Testcontainers
@SpringBootTest, MockMvc for Controllers, @DataJpaTest for Repositories, Testcontainers to test against a real containerized Postgres DB; full test suite on GitHub
2.5h
edit_note

Week 35 Technical Notes & Journal

#LeetCode #Java #DSA #Week35