Artificial Intelligence — CBSE Class 10 board question

Step 1: Collect Data (Documents)

• Doc 1: Sahil likes to play cricket
• Doc 2: Sajal likes cricket too
• Doc 3: Sajal also likes to play basketball

Step 2: Create a List of Unique Words (Vocabulary)
{sahil, likes, to, play, cricket, sajal, too, also, basketball}
(9 unique words)

Step 3: Remove Stop Words (optional normalisation)
Stop words like "to", "too", "also" may be removed → Vocabulary: {sahil, likes, play, cricket, sajal, basketball}

Step 4: Create Document Vectors (Frequency Table)

| Word | Doc1 | Doc2 | Doc3 |
|----------|------|------|------|
| sahil | 1 | 0 | 0 |
| likes | 1 | 1 | 1 |
| play | 1 | 0 | 1 |
| cricket | 1 | 1 | 0 |
| sajal | 0 | 1 | 1 |
| basketball | 0 | 0 | 1 |

Each document is now represented as a numerical vector based on word frequency.

Source: Chapter 6, Bag of Words Model

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• Examiners expect all four steps clearly labelled: data collection → vocabulary creation → stop word removal → document vector/frequency table.
• The frequency table is the key output; missing it will cost marks.
• You don't need to calculate TF-IDF here — just the BoW frequency table.
• Stop word removal is considered one of the steps in this model as taught in the chapter; include it even briefly.