Proctor Level1_135

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.

Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout

Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.

Viva tipFunction signature + 3-4 important lines + edge case.

SimpleStack bolo: Python, Flask, Jinja2, SQLAlchemy, SQLite, HTML/CSS/Bootstrap, maybe Chart.js.

SimpleLive UI change: relevant CSS/HTML template kholo — color, margin, flex, bootstrap class. Save + hard refresh.

Example

/* button red */
.btn-primary { background: red; }

/* center navbar item */
.navbar { justify-content: center; }

Viva tipDevTools se pehle try, phir file mein permanent change.

Simplemodels.py = har table ki class: columns, PK/FK, relationships. Yeh Model layer hai.

Suggested flow1) Classes list karo
2) Har table ka kaam 1 line
3) Relationships (1-M / M-M)
4) Constraints (unique, nullable)

Example

class Lot(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    spots = db.relationship('Spot', backref='lot', lazy=True)

SimpleBootstrap CSS framework — grid, navbar, buttons jaldi. CDN ya downloaded files.

SimpleDemo script pehle se practice karo, 5-7 minute, saari roles.

Suggested flow

1) Register/login user 2) Admin login — CRUD 3) Approval/blacklist 4) Booking/apply 5) Search 6) Validation edge (slots 0, duplicate) 7) Logout
Bolte-bolte dikhao: 'Yahan overbooking rokta hoon'. Code tab kholna jab poochhein.
Crash ho to debug calmly: terminal error, typo, DB path.
Mandatory features skip mat karna — examiner list tick karta hai.

Simplemodels.py har table ki class hai — columns, PK/FK, relationships. Yeh Model layer hai.

Viva mein file khol ke bolo:
1) Kaunsi classes/tables hain (User, Role-specific, Booking...)
2) Har table ka kaam 1 line
3) Relationships: 1-1 / 1-M / M-M, backref, cascade, lazy
4) Constraints: unique email, nullable, default status

Example skeleton

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(120), unique=True, nullable=False)
    role = db.Column(db.String(20), default='user')
    bookings = db.relationship('Booking', backref='user', cascade='all, delete-orphan')

ER diagram: rectangles entities, lines relationships, PK/FK mark. Schema = yahi structure.
Tables create: db.create_all() ya migrations. SQLite file SQL viewer se dikha sakte ho.

SimpleRelationships tables ko jodti hain taaki related data object se mil jaaye.

One-to-Many: User → kai Posts. posts = relationship('Post', backref='author'). FK post.user_id.
One-to-One: User → Profile. uselist=False + unique FK. Profile.user_id unique.
Many-to-Many: Student ↔ Drive. Junction/secondary table (student_id, drive_id).

Example 1-1:

class Profile(db.Model):
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), unique=True)
    user = db.relationship('User', back_populates='profile', uselist=False)

1-M ko 1-1: child FK pe unique=True + uselist=False.
Parent-child: parent PK, child FK. Junction table extra columns bhi rakh sakti hai (applied_on).

SimpleCascade parent ke saath child pe automatic action (generally delete).

Company delete → uski drives bhi delete, warna orphan rows / FK error.
SQLAlchemy: db.relationship('Drive', cascade='all, delete-orphan', backref='company')
SQL: ForeignKey(..., ondelete='CASCADE')

Cascade sirf delete nahi: save-update, merge, refresh-expire, expunge, delete-orphan.
Cascade Update: parent PK change to child FK update (rare, PK mat badlo).
Parent delete jab children active hon: constraint error, ya cascade se children gayab, ya pehle children handle karo — design choice examiner poochta hai.
CSS cascading alag topic hai (styles inherit/override).

Simplelazy loading related objects tab load karta hai jab attribute access karte ho, pehle nahi.

user = User.query.get(1)  # posts query nahi

user.posts # ab query

lazy=True / 'select' default. lazy='joined' eager join. lazy='dynamic' query object.
uselist=False One-to-One (single object, list nahi). Hataoge to list mil sakti hai.
Frontend lazy loading images alag cheez hai (viewport mein aaye tab load).

Simple 4-step: Model → DB → Form → Route → Template. Yeh sabse common live-coding hai.

1) models.py: age = db.Column(db.Integer, nullable=True)
2) DB: SQLite viewer se column, ya DB delete karke create_all, ya ALTER TABLE user ADD COLUMN age INTEGER; production mein Flask-Migrate.
3) register.html: <input type='number' name='age' min='18' required>
4) route: user.age = request.form.get('age', type=int); commit
5) dashboard: {{ user.age }} admin table mein <td>{{ u.age }}</td>

Print terminal: print('AGE', request.form.get('age'))
Phone/city same pattern, String(20). Openings on Drive: integer column + form + create_drive route.

SimpleRoutes/controllers URLs handle karte hain. app.py app banata hai, models.py data, templates/ views, static/ CSS-JS.

Typical structure:
app.py / __init__.py → Flask app, db.init, register blueprints
models.py → tables
routes.py / views → @app.route functions
templates/ → Jinja HTML
static/ → css, images
instance/*.db → SQLite

Ek route explain karne ka template:
1) URL + methods 2) Auth/role check 3) Form/query se data 4) Business rule (duplicate, slots) 5) db.session 6) render ya redirect

Example GET+POST same route: GET form, POST save.
Data HTML se: form name= → request.form. Data HTML ko: render_template(..., items=query).
Nayi .py file: import karke use karo, warna Flask ko pata nahi. Folder rename: imports/paths/templates check.

Yeh MAD-1 viva question tumhare project ke context se linked hai. Short answer is structure se do:

Pehle 1 line definition/purpose, phir tumhare project ka example, phir chhota code/flow.

Typical Flask flowBrowser request → @app.route controller → SQLAlchemy model/DB → Jinja template response.

Auth: session['user_id'] + role check. CRUD: add/commit, query.all, field update, delete.
Live change maange to: related model → route → template, phir browser refresh karke dikhao.

Example (generic create):
obj = Model(name=request.form.get('name'))

db.session.add(obj); db.session.commit()
return redirect(url_for('list_view'))

SimpleFlask Python ka micro web framework hai — routes, templates, request/response handle karta hai.

from flask import Flask
app = Flask(__name__)
@app.route('/')
def home():
    return 'Hello'
app.run(debug=True)  # default port 5000

__name__ se Flask ko pata chalta hai templates/static kahan se load karni hai. Hataoge to resource paths toot sakte hain.

Faydesimple, flexible, MAD1 syllabus. Nuksaan: bade features (admin, auth) khud jodne padte hain.

app.run() development server start karta hai. Production mein gunicorn/waitress.

Examiner code pe ungli rakh ke poochta hai — panic mat karo, 4-line formula bolo.

1) Yeh file/line kya role hai (model / route / template / config)?
2) Input kahan se aata hai (form, URL <id>, session, JSON)?
3) DB pe kya query/write?
4) Output kya (render_template / redirect / jsonify)?

Example

@app.route('/book/<int:id>', methods=['POST']) — logged-in user session se, trek id URL se, Booking add, slots--, redirect history.

Unknown line: imports (request, url_for, flash), decorators, if checks, commit — har keyword ka reason ready rakho.

SimpleBootstrap CSS/JS framework — ready classes se responsive UI.

<button class='btn btn-primary'>Save</button>

Red button: btn btn-danger. Navbar, cards, grid (row/col).
CDN: <link href='https://cdn.jsdelivr.net/npm/bootstrap@5...'> — internet na ho to style toot sakti hai. Local copy safer viva ke liye.
CSS vs Bootstrap: Bootstrap faster consistent UI, custom CSS fine-control. Dono saath use ho sakte hain.
aria-current='page' accessibility — current nav item screen readers ko.
CDN fayda: cache, quick setup. Nuksaan: offline, privacy, version lock.

SimpleBootstrap CSS/JS framework — ready classes se responsive UI.

<button class='btn btn-primary'>Save</button>

Red button: btn btn-danger. Navbar, cards, grid (row/col).
CDN: <link href='https://cdn.jsdelivr.net/npm/bootstrap@5...'> — internet na ho to style toot sakti hai. Local copy safer viva ke liye.
CSS vs Bootstrap: Bootstrap faster consistent UI, custom CSS fine-control. Dono saath use ho sakte hain.
aria-current='page' accessibility — current nav item screen readers ko.
CDN fayda: cache, quick setup. Nuksaan: offline, privacy, version lock.

Simpleexaminer UI tweak maangta hai — CSS class ya inline, instantly dikhao.

Button color: <button class='btn btn-success'> ya style='background:#22c55e;color:#fff'
Navbar: navbar-dark bg-success / style='background:yellow' / fixed-bottom se neeche.
Center: .wrap { display:flex; justify-content:center; align-items:center; min-height:100vh; }
text-align:center heading ke liye. Bootstrap: d-flex justify-content-center, mx-auto, text-center.
Hover: .btn:hover { opacity:0.8; transform:scale(1.02); }
Half width: class='col-6' ya width:50%. Row→column: flex-direction:column / col-12 stack.
Login card: card shadow p-4 mx-auto (max-width:400px).
Table header green: th { background:green; color:white; } Bold column: td:nth-child(2){font-weight:bold}
Box shadow: box-shadow: 4px 4px 12px rgba(0,0,0,.3);
Background image: body { background: url('/static/bg.jpg') center/cover; }
Reset button: <button type='reset'>Clear</button>
Move button: ms-auto / position / flex order.
Jinja dashboard heading: <h1>{{ user.name }}'s Dashboard</h1>