Basic Git Commands

   $ git add .
   $ git commit -m "write some message"
   $ git push 

python-training

This repository has been created for Python Training at Instill Learning.

Built-in Data Types

• Text Type: str
• Numeric Types: int, float, complex
• Sequence Type: list, tuple, range
• Mapping Type: dict
• Set Type: set, frozenset
• Boolean Type: bool
• Binary Type: bytes, bytearray, memoryview
• None Type: NoneType

check datatype

type(variable)

Python Collections

• List: a collection which is ordered and changable also allows duplicate items.
• Tuple: a collection which is ordered and unchangable also allows duplicate items.
• Set: a collection which is unordered and unchangable also not allow duplicate items.
• Dictionary: a collection which is ordered (before python 3.6 it was unordered) and changable also Not allow duplicate items.

OBJECTIVE QUESTIONS

### Easy
1. **Which of the following is a valid variable name in Python?**
   - A) `1_variable`
   - B) `variable_name`
   - C) `variable-name`
   - D) `None`

2. **What data type is the number `42` in Python?**
   - A) `float`
   - B) `str`
   - C) `int`
   - D) `bool`

   

3. **Which of the following is used to represent a string in Python?**
   - A) `{}`
   - B) `()`
   - C) `""`
   - D) `[]`


4. **What will be the data type of `x` after the following assignment: `x = 3.14`?**
   - A) `int`
   - B) `str`
   - C) `float`
   - D) `complex`

5. **Which of the following is the correct way to define a dictionary in Python?**
   - A) `my_dict = [key1: 'value1', key2: 'value2']`
   - B) `my_dict = (key1: 'value1', key2: 'value2')`
   - C) `my_dict = {key1: 'value1', key2: 'value2'}`
   - D) `my_dict = "key1: 'value1', key2: 'value2'"`

### Medium
6. **Which of the following statements about Python lists is true?**
   - A) Lists are immutable.
   - B) Lists can contain elements of different data types.
   - C) Lists are defined using parentheses `()`.
   - D) A list cannot contain another list.



7. **What will be the result of the following operation: `type( (1, ) )`?**
   - A) `int`
   - B) `str`
   - C) `list`
   - D) `tuple`



8. **Which function can convert a string into an integer in Python?**
   - A) `int()`
   - B) `str()`
   - C) `float()`
   - D) `bool()`



9. **What is the result of the following expression: `bool("False")`?**
   - A) `True`
   - B) `False`
   - C) `""`
   - D) `None`



10. **Which method would you use to add an element to a set in Python?**
    - A) `append()`
    - B) `add()`
    - C) `insert()`
    - D) `push()`



### Hard
11. **Which of the following is not a legal variable name in Python?**
    - A) `_myvar`
    - B) `my_var`
    - C) `2myvar`
    - D) `myVar`



12. **If `x = 5` and `y = "5"`, what will `type(x+y)` produce?**
    - A) `int`
    - B) `TypeError`
    - C) `str`
    - D) `float`



13. **What does the `is` operator test for?**
    - A) Value equality
    - B) Identity equality
    - C) Membership
    - D) Size comparison



14. **Which of the following correctly creates a byte data type in Python?**
    - A) `b = bytes(5)`
    - B) `b = byte[5]`
    - C) `b = 5b`
    - D) `b = "5".to_bytes()`



15. **In Python, what is the correct way to declare a complex number?**
    - A) `c = 1 + j2`
    - B) `c = 1 + 2i`
    - C) `c = 1 + 2j`
    - D) `c = complex(1,2)`
    

------------------------------------
ANSWERS::
  - **1**: B) `variable_name`
   - **2**: C) `int`
   - **3**: C) `""`
   - **4**: C) `float`
   - **5**: C) `my_dict = {key1: 'value1', key2: 'value2'}`
   - **6**: B) Lists can contain elements of different data types.
   - **7**: D) `tuple`
   - **8**: A) `int()`
   - **9**: A) `True`
    - **10**: B) `add()`
    - **11**: C) `2myvar`
    - **12**: B) `TypeError`
    - **13**: B) Identity equality
    - **14**: A) `b = bytes(5)`
    - **15**: C) `c = 1 + 2j` and D) `c = complex(1,2)`