# Quiz — Session 3: The language of machines 🟢 **Program:** Applied AI — Beginner Level · Instructor: Yann Isola **10 questions · only one correct answer per question · corrected at the end of the document** --- **Q1. When you send a message to an AI, what does it actually “see”?** - A. Your words, exactly as you wrote them - B. A sequence of numbers corresponding to pieces of text - C. An image of your screen - D. The sound of your voice --- **Q2. What is a token?** - A. A virtual coin to pay the AI - B. A security password - C. A piece of text (whole word, part of a word or punctuation) that the AI processes at once - D. The name of the robot that answers the questions --- **Q3. The word “today” will probably be cut by AI into…** - A. A single token, like all words - B. Several tokens, for example `aujourd` + `'` + `hui` - C. Twenty-six tokens, one per letter of the alphabet - D. Zero token: the AI ignores words with apostrophe --- **Q4. Why does the AI cut words into pieces instead of numbering each word in the dictionary?** - A. Because the pieces recombine like LEGOs and allow you to manage even never-before-seen words - B. Because computers don't like long words - C. To make responses slower and more thoughtful - D. Because it is an international law --- **Q5. An embedding is the idea of…** - A. Hide secret messages in text - B. Transform each word into coordinates, where words close in meaning are close on the map - C. Compress the text so that it takes up less space - D. Automatically translate text into English --- **Q6. In the famous “word equation”, king − man + woman gives a result close to…** - A. Castle -B.Prince - C. Queen - D. Crown --- **Q7. The context window of an AI is…** - A. The small chat window on the screen - B. Her working memory: everything she can “keep in mind” at once, measured in tokens - C. His infinite memory of all the conversations in the world - D. The time she takes to respond --- **Q8. Your conversation with the AI ​​becomes very, very long. What is likely to happen?** - A. AI is getting smarter and smarter - B. The AI can “forget” what was said at the beginning, because it goes out of its context window - C. The computer explodes - D. Nothing, the AI remembers everything forever --- **Q9. The AI ​​gives you a book with its title, its author and its date... but this book does not exist. What is this phenomenon called, and why does it occur?** - A. A screen bug: just restart the computer - B. A lie: the AI wants to deceive you on purpose - C. A hallucination: the AI produces the most *plausible* text, not necessarily the most *true* - D. A computer virus caught on the Internet --- **Q10. You want AI to accurately translate an important document. What temperature is best?** - A. Low temperature, for reliable and predictable responses - B. A very high temperature, for a translation full of surprises - C. Temperature does not exist for AI - D. 37.2 °C, like the human body --- --- ## ✅ Answer key and explanations | # | Answer | Quick explainer | |---|---------|-------------------| | Q1 | **B** | The AI ​​never sees your letters: the text is converted into token numbers before any calculation.| | Q2 | **C** | A token = a block of text. Sometimes a whole word (“cat”), sometimes a piece (“intelli” + “gence”), sometimes punctuation. | | Q3 | **B** | Compound words or words with an apostrophe are often split into several tokens. ⚠ The exact cutting varies depending on the model. | | Q4 | **A** | Impossible to number all the possible forms (conjugations, plurals, invented words). The pieces recombine endlessly. | | Q5 | **B** | Embedding = direction coordinates. “Cat” and “dog” are neighbors on the map; “cat” and “bill” are far away. | | Q6 | **C** | The direction “masculine → feminine” is an arrow on the map: king − man + woman ≈ queen. 👑 | | Q7 | **B** | This is its working memory, limited and measured in tokens. Large, but not infinite. | | Q8 | **B** | What comes out of the window is forgotten - like a leaf that falls from an overly full table. | | Q9 | **C** | The AI ​​calculates the most probable sequence, not the truest one. No intention to deceive: it's a hallucination, and it's true! | | Q10 | **A** | Precision task = low temperature. Creativity (high temperature) is for brainstorming and poetry. | **Suggested scale:** 1 point per correct answer. - 9–10: 🏆 Elite tokenizer — the machine no longer has any secrets for you - 7–8: 🥈 Very solid — some tokens to consolidate - 5–6: 🥉 Good basis — reread the context window and hallucinations parts - < 5: 🔁 Let's take another look at the interactive page and here we go again!