Multiple Choice Questions on String Formatting in Python

📚 Quick Study Guide

• ✨ String Formatting Overview: String formatting allows you to insert variables or values into a string.
• 🔑 `%` Operator (Old Style): Uses format specifiers like `%s` (string), `%d` (integer), `%f` (float). Example: `'Hello, %s' % 'World'`.
• 💎 `.format()` Method (New Style): Uses replacement fields denoted by curly braces `{}`. Example: `'Hello, {}'.format('World')`. You can also use named placeholders: `'Hello, {name}'.format(name='World')`.
• 🌟 f-strings (Python 3.6+): Prefix the string with `f` and embed expressions inside curly braces. Example: `name = 'World'; f'Hello, {name}'`. f-strings are generally the most readable and efficient.
• 🔢 Format Specifiers: Within replacement fields (e.g., in `.format()` or f-strings), you can use format specifiers for precise control over output (e.g., `:.2f` for two decimal places).

Practice Quiz

1. Which of the following is the oldest method for string formatting in Python?
   1. A) f-strings
   2. B) `.format()` method
   3. C) `%` operator
   4. D) Template strings
2. What is the correct syntax for using f-strings?
   1. A) `string.f'Hello, {name}'`
   2. B) `f'Hello, {name}'`
   3. C) `'Hello, {name}'.f`
   4. D) `'Hello, ' + {name}`
3. Which method is generally considered the most readable and efficient?
   1. A) `%` operator
   2. B) `.format()` method
   3. C) f-strings
   4. D) Template strings
4. How would you format a float variable `num` to display only two decimal places using the `.format()` method?
   1. A) `'{:.2}'.format(num)`
   2. B) `'{.2f}'.format(num)`
   3. C) `'{:2f}'.format(num)`
   4. D) `'{: .2f}'.format(num)`
5. Which of the following is a valid way to use named placeholders with the `.format()` method?
   1. A) `'Hello, {name}'.format('World')`
   2. B) `'Hello, {}'.format(name='World')`
   3. C) `'Hello, {name}'.format(name='World')`
   4. D) `'Hello, {name=World}'.format()`
6. What will be the output of the following code: `print('The value is %d' % 3.14)`?
   1. A) The value is 3.14
   2. B) The value is 3
   3. C) Error
   4. D) The value is 3.0
7. Which string formatting technique is ONLY available in Python 3.6 and later?
   1. A) `%` operator
   2. B) `.format()` method
   3. C) f-strings
   4. D) Template strings