# CustomBix — Full Platform Specification & Comprehensive Curriculum Index

## Executive Summary
CustomBix is an open educational web application that delivers a high-speed, interactive test engine layer on top of IndiaBIX questions and answers. It serves as the active, timed alternative to static platforms such as GeeksforGeeks aptitude and IndiaBIX:
1. Passive reading vs. Active time-pressured recall: Users can test themselves with real countdown timers (per-question or total test time).
2. Inability to practice mixed topics: Users can create custom mock exams combining multiple disparate subtopics into a unified session.
3. Lack of negative marking simulation: CustomBix provides standard competitive exam penalties (-0.25, -0.33, -1.0).
4. Lack of strict sequential constraints: CustomBix supports strict forward-only progression, replicating TCS NQT and modern proctored assessment environments.
5. In-session data resilience: Test answers, timing state, and question positions are cached in LocalStorage, preventing accidental test loss if browser tabs are refreshed or connections dropped.

## Web Application Access
- Production Web App URL: https://custombix.vercel.app/
- Open Source Repository: https://github.com/em-srs/CustomBix
- Live Scraper API: https://custombix.onrender.com

## Detailed Syllabus & Topic Tree
### 1. Arithmetic & Quantitative Aptitude (35 Subtopics)
- Numbers & Number Systems
- H.C.F. and L.C.M. of Numbers
- Decimal Fractions
- Simplification
- Square Root and Cube Root
- Average
- Problems on Numbers
- Problems on Ages
- Surds and Indices
- Logarithms
- Percentage
- Profit and Loss
- Ratio and Proportion
- Partnership
- Chain Rule
- Pipes and Cisterns
- Time and Work
- Time and Distance
- Problems on Trains
- Boats and Streams
- Alligation or Mixture
- Simple Interest
- Compound Interest
- Area Calculation
- Volume and Surface Area
- Races and Games of Skill
- Calendar Problems
- Clock Problems
- Stocks and Shares
- Permutation and Combination
- Probability Theory
- True Discount
- Banker's Discount
- Heights and Distances
- Odd Man Out and Series

### 2. Logical Reasoning (18 Subtopics)
- Number Series
- Letter and Symbol Series
- Verbal Classification
- Analogies
- Artificial Language
- Matching Definitions
- Making Judgments
- Verbal Reasoning
- Logic Problems
- Analyzing Arguments
- Course of Action
- Statement and Assumption
- Statement and Conclusion
- Cause and Effect
- Logical Deduction
- Theme Detection
- Statement and Argument
- Essential Part

### 3. Verbal Ability (17 Subtopics)
- Spotting Errors
- Synonyms
- Antonyms
- Selecting Words
- Spellings
- Sentence Formation
- Ordering of Words
- Sentence Correction
- Sentence Improvement
- Completing Statements
- Ordering of Sentences
- Paragraph Formation
- Closet Test
- Comprehension
- One Word Substitutes
- Idioms and Phrases
- Change of Speech & Voice

### 4. Technical Programming (3 Tracks)
- C Programming (Language Fundamentals, Control Instructions, Functions, Pointers, Arrays, Strings, Structures, Dynamic Memory, Preprocessor, Bitwise Operators, Command Line)
- C++ Programming (OOP Concepts, Classes & Objects, Constructors & Destructors, Functions, References)
- Java Programming (Declarations & Access Control, Flow Control, Exceptions, Assertions, Garbage Collection, Java.lang, Threads, Collections)

## Exact Exam & Company Mappings
| Target Exam / Company | Relevant Sections on CustomBix | Recommended Test Configuration |
| :--- | :--- | :--- |
| TCS NQT (National Qualifier Test) | Quantitative Aptitude, Reasoning, Verbal | 20-30 Qs, Strict Serial Navigation, Per-Question Timer (60s) |
| Infosys InfyTQ & Off-Campus | Quantitative, Logical Reasoning, Java/C MCQs | 15-25 Qs, Free Navigation, Overall Exam Timer |
| Wipro Elite / NLTH | Arithmetic, Reasoning, Verbal Ability | 20 Qs, 60s per Q, Negative Marking 0 |
| Accenture Assessment | Critical Reasoning, Problem Solving, Verbal | 20 Qs, 45s per Q, Free Navigation |
| Cognizant GenC / Elevate | Quantitative, Analytical, English, Coding MCQs | 25 Qs, Strict Serial, Negative Marking 0 |
| Capgemini Exceller | Game-based/Aptitude, Verbal, Pseudocode | 20 Qs, 60s per Q |
| Tech Mahindra / Amazon / Deloitte | Quantitative, Analytical Puzzles, English | 20-30 Qs, Free Navigation, 60s per Q |
| GATE General Aptitude | Quantitative (Percentages, Ratios, Probability, Geometry) & Spatial | 10 Qs, -0.33 or -1.0 Negative Marking, Total Timer (15 mins) |
| Bank PO (SBI PO / IBPS PO) | Quantitative Aptitude, Reasoning Ability, English | 30-35 Qs, -0.25 Negative Marking, Per-Question Timer (35s) |
| SSC CGL Tier 1 & Tier 2 | General Intelligence & Quantitative Aptitude | 25 Qs, -0.25 or -0.50 Negative Marking |
| RRB NTPC & Group D | Mathematics & General Intelligence | 30 Qs, -0.33 Negative Marking, Total Timer |
| UPSC CSAT | Basic Numeracy, Data Interpretation, Logical Reasoning | 25-30 Qs, -0.83 Negative Marking, Total Timer |
| CAT / XAT / CMAT | Arithmetic, Algebra, Number Theory, Logical Puzzles | 20 Qs, -1.0 Negative Marking, Total Timer |

## Scoring & Analytics Engine
- Real-time score computation: `(Correct × PositiveMark) - (Wrong × NegativePenalty)`
- Accuracy percentage computation: `(Correct / (Correct + Wrong)) × 100`
- Time efficiency analysis: Average seconds spent per answered vs. skipped questions
- Weak topic discovery: Aggregates performance by subtopic to pinpoint lowest-accuracy domains.