Syllabus-aligned chapters
Every chapter and topic maps to your board’s own Class XI–XII syllabus, written for the board exam — not a generic course.
WBCHSE & CBSE · Class XI–XII
The Computer Science syllabus, chapter by chapter.
SyllabitEdu turns the WBCHSE and CBSE (083) Computer Science syllabuses into clear chapters, quick quizzes, and coding practice — with your progress and streak in one place.
A
Hi, Ananya
Class XII · Computer Science
Continue learning
Data Representation
Topic 4 of 6 · 68%
Weekly goal
🔥 12-day streak
68%
Free
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Programming Fundamentals
10 topics · quiz
Ch 5
›
Relational Database & SQL
8 topics · quiz
Built for the board exam
Everything you need to revise, in one app.
No scattered PDFs or random videos — just the syllabus, structured the way you study it.
Quizzes with instant review
Chapter quizzes score instantly and show the correct answers, so you learn from every mistake right away.
Coding & short-answer practice
Practise programming problems with starter code and sample solutions, plus short-answer questions to test recall.
Progress & streaks
See chapters completed, quiz scores, and a daily streak that keeps you coming back — synced to your account.
Free to try, fair to buy
A set of chapters is free. A premium plan unlocks everything for a fixed period — one-time, never auto-renewed.
Made in West Bengal
Written here, for the WBCHSE Computer Science (COMS) and CBSE Computer Science (083) curricula — nothing off-syllabus.
Two boards, fully covered
Pick your subject and dive in.
WBCHSE · COMS
Computer Science
The full WBCHSE Class XI–XII Computer Science syllabus, from first principles to programming.
- Programming fundamentals & problem solving
- Data representation & computer organisation
- Relational databases & SQL
- Networking, and more — chapter by chapter
CBSE · 083
Computer Science
The full CBSE Class XI–XII Computer Science syllabus, Python-first and board-exam ready.
- Computer systems & Python programming
- Data handling, functions & file handling
- Data structures, databases & SQL
- Computer networks, and more — chapter by chapter
How it works
From sign-up to your first quiz in minutes.
STEP 01
Create your account
Sign up with your email, verify it, and choose your board — WBCHSE or CBSE Computer Science.
STEP 02
Read & practise
Work through chapters and topics, then take the chapter quiz and review the answers instantly.
STEP 03
Go premium when ready
Unlock every chapter with a plan that fits — pay securely once, with no automatic renewal.
A look inside
Clean screens, made for focused study.
A
Hi, Ananya
Class XII · Computer Science
Continue learning
Data Representation
Topic 4 of 6 · 68%
This week
🔥 12-day streak68%
Ch 5›
Relational Database & SQL
8 topics · quiz
Number systems
Computers store everything in binary. A number system is defined by its base — the count of distinct digits it uses.
# decimal 45 in binary
bin(45) # '0b101101'
hex(255) # '0xff'
bin(45) # '0b101101'
hex(255) # '0xff'
Tip — hexadecimal (base 16) is a compact way to write binary: one hex digit = four bits.
Take the quiz
What is the base of the hexadecimal number system?
2
8
16
10
Next question
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Questions
Good to know before you start.
Is the content aligned to the board syllabus?
Yes. Chapters and topics follow the WBCHSE Class XI–XII Computer Science syllabus and the CBSE Class XI–XII Computer Science (083) syllabus, and are written with the board exam in mind.
What's free and what needs premium?
Several chapters are free to use. A premium plan unlocks all chapters, quizzes and practice for the plan's duration. You can see exactly what's included on the Plans screen in the app.
Does my plan auto-renew?
No. Plans are one-time purchases for a fixed number of days and do not auto-renew, so you are never charged automatically. Renewing early simply adds days to your remaining balance.
How do I delete my account?
Open Profile → “Delete account” in the app to permanently remove your account and personal data. See the account deletion page for details.
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