Multiple Choice Questions on String Manipulation for Grade 8 Computer Science

📚 Quick Study Guide

• ✂️ A string is a sequence of characters. Think of it like a word or a sentence in Python.
• ➕ Concatenation means joining two strings together. You can use the `+` operator to do this. For example, `'hello' + 'world'` results in `'helloworld'`.
• 🔢 Indexing allows you to access individual characters in a string. Remember, Python starts counting from 0! So, in `'Python'`, `Python[0]` is `'P'` and `Python[1]` is `'y'`.
• 🔪 Slicing extracts a portion of a string. For example, `'Computer'[0:4]` gives you `'Comp'`. The general form is `string[start:end]`, where `start` is inclusive and `end` is exclusive.
• 📏 The `len()` function returns the length (number of characters) of a string. For example, `len('hello')` returns 5.
• 🔄 String methods are built-in functions that you can use to manipulate strings. Examples include `.upper()` (converts to uppercase) and `.lower()` (converts to lowercase).
• ✅ Strings are immutable, meaning you can't change them directly. You need to create a new string with the desired changes.

🧪 Practice Quiz

1. Which of the following operations combines two strings together?
   1. A. Slicing
   2. B. Indexing
   3. C. Concatenation
   4. D. Splitting
2. What is the index of the first character in the string "Coding"?
   1. A. 1
   2. B. 0
   3. C. -1
   4. D. 2
3. What will be the output of the following Python code? python word = "Science" print(len(word))
   1. A. 6
   2. B. 5
   3. C. 7
   4. D. 8
4. Which of the following methods converts a string to uppercase?
   1. A. .lower()
   2. B. .capitalize()
   3. C. .upper()
   4. D. .title()
5. What will be the output of the following Python code? python text = "Hello World" print(text[6:11])
   1. A. Hello
   2. B. World
   3. C. World
   4. D. o Wor
6. What term is used to describe extracting a portion of a string?
   1. A. Joining
   2. B. Slicing
   3. C. Adding
   4. D. Multiplying
7. If `str1 = "Computer"`, what will `str1[3]` return?
   1. A. p
   2. B. m
   3. C. o
   4. D. t