Generate these sections in order (all inside the main-content div):
File Handling - Text File (Part 1/4) — Lecture 17
CBSE | XII CS | Computational Thinking and Programming | 35 min
1. Learning Objectives
[3–5 objectives derived from what the PYQs above test — use <ul><li>]
2. 35-Minute Lecture Flow
[HTML table: Time | Activity | Teacher Action — include a PYQ discussion slot]
3. Concept Notes
[For EVERY sub-concept tested in PYQs:
- .def-box for definition (with "In exam language: ..." line)
- .key-box with syntax/rules as <ul><li>
- .example-box for worked examples
- <pre><code> for code with .kw/.bi/.st/.cm/.nm token spans
- .recall-box for Output with exact expected output
After each concept, embed 1–2 actual PYQs in .pyq-box with .pyq-meta (year · marks · type)]
4. Examiner Tricks & Common Mistakes
[One .warn-box per trick from Section 5 — be specific, give the wrong vs right answer]
5. Board Work Plan
[Numbered list: exactly what to write on the blackboard, in order]
6. Classroom Practice Questions
[Modelled on PYQ style. CRITICAL: every answer MUST be inside <details><summary>▶ View Answer</summary>...</details> — never expose the answer directly.
3×1M MCQ — use this exact structure:
<div class="mcq-box">
<b>Q1.</b> Question text?<br>
<ul class="options">
<li>a) ...</li>
<li>b) ...</li>
<li>c) ...</li>
<li>d) ...</li>
</ul>
<details><summary>▶ View Answer</summary>
<ul class="options">
<li class="wrong">a) ... — reason why wrong</li>
<li class="correct">b) ... ✓ — reason why correct</li>
...
</ul>
</details>
</div>
(Note: options list shown WITHOUT .correct/.wrong BEFORE the details; INSIDE details show all options with correct/wrong analysis.)
3×2M short answer in .self-test-box:
<div class="self-test-box"><b>Q4.</b> Question<br><details><summary>▶ View Answer</summary>Full answer</details></div>
2×3-5M programming in .self-test-box:
<div class="self-test-box"><b>Q7.</b> Question<br><details><summary>▶ View Answer</summary><pre><code>...code...</code></pre></details></div>
1 HOTS in .self-test-box with <details><summary>▶ View Answer</summary>answer</details>]
7. PYQ Discussion (All 0 Questions)
[For EVERY single PYQ provided in Section 4 — no skipping.
Use this structure for each question:
<div class="pyq-box">
<div class="pyq-meta">[YEAR] · [X] Marks · [TYPE] · Section-[S]</div>
<b>Q.</b> [full question text — include code if any]<br><br>
<b>Concept tested:</b> [concept name]<br>
<details><summary>▶ View Model Answer</summary>
<b>Model Answer:</b> [full answer with code/table as needed, using .kw/.bi/.st token spans in <pre><code>]<br>
<b>Common mistake:</b> [what students get wrong — be specific]
</details>
</div>]
8. Student Notes (Copy-ready)
[Concise notes — every concept from PYQs — in .key-box and .def-box; self-check questions in .self-test-box with <details><summary>▶ View Answer</summary>answer</details>]
9. Homework
[2×1M + 2×2M + 1×3M + 1×5M — same PYQ pattern; mark difficulty with .critical/.high/.medium tag.
EVERY answer wrapped in <details><summary>▶ View Answer</summary>...</details> inside .self-test-box or .mcq-box]
10. Exam Tips
[5 specific tips as .tip-box — derived from PYQ patterns for THIS topic only]
11. Last-Minute Revision Cards
<div class="card-grid">
[One .card per concept: <div class="card-title">[concept]</div> + 1 rule + 1 example]
</div>