1. What are the key features of Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Python is a high-level, interpreted programming language known for its readability and versatility. Its key features include:<\/p>\n\n\n\n\n- Easy-to-read syntax<\/li>\n\n\n\n
- Dynamic typing and memory management<\/li>\n\n\n\n
- Large standard library<\/li>\n\n\n\n
- Cross-platform compatibility<\/li>\n\n\n\n
- Support for multiple programming paradigms (object-oriented, procedural, and functional)<\/li>\n<\/ul>\n\n\n\n
2. What is the difference between a list and a tuple in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\n- List<\/strong>: Mutable, meaning its elements can be changed. Defined using square brackets
[ ]<\/code>.<\/li>\n\n\n\n- Tuple<\/strong>: Immutable, meaning once defined, its elements cannot be changed. Defined using parentheses
( )<\/code>.<\/li>\n<\/ul>\n\n\n\n3. What is the purpose of indentation in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Indentation is used to define code blocks in Python. Unlike other programming languages that use braces or keywords, Python relies on consistent indentation to structure its code. Improper indentation will result in a syntax error.<\/p>\n\n\n\n4. Explain the use of is<\/code> versus ==<\/code> in Python.<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\n==<\/code> checks for value equality<\/strong> (i.e., whether two variables have the same value).<\/li>\n\n\n\nis<\/code> checks for object identity<\/strong> (i.e., whether two variables refer to the same memory location).<\/li>\n<\/ul>\n\n\n\n5. What are the basic built-in data types in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Python\u2019s primary built-in data types include:<\/p>\n\n\n\n\n- Numeric<\/strong>:
int<\/code>, float<\/code>, complex<\/code><\/li>\n\n\n\n- Sequence<\/strong>:
list<\/code>, tuple<\/code>, range<\/code><\/li>\n\n\n\n- Text<\/strong>:
str<\/code><\/li>\n\n\n\n- Set<\/strong>:
set<\/code>, frozenset<\/code><\/li>\n\n\n\n- Mapping<\/strong>:
dict<\/code><\/li>\n\n\n\n- Boolean<\/strong>:
bool<\/code><\/li>\n\n\n\n- Binary<\/strong>:
bytes<\/code>, bytearray<\/code>, memoryview<\/code><\/li>\n<\/ul>\n\n\n\n6. What is a dictionary in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
A dictionary is an unordered collection of key-value pairs. Each key must be unique and immutable. Dictionaries are defined using curly braces {}<\/code>.
Example:<\/p>\n\n\n\npythonCopyEditperson = {\"name\": \"John\", \"age\": 28}\n<\/code><\/pre>\n\n\n\n7. Differentiate between append()<\/code> and extend()<\/code> methods in a list.<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\nappend()<\/code> adds a single element to the end of the list.<\/li>\n\n\n\nextend()<\/code> adds elements from an iterable (like a list or tuple) to the list.
Example:<\/li>\n<\/ul>\n\n\n\na = [1, 2]
a.append([3, 4]) # Output: [1, 2, [3, 4]]
a.extend([5, 6]) # Output: [1, 2, [3, 4], 5, 6]
<\/code><\/pre>\n\n\n\n8. What are logical operators in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Python includes the following logical operators:<\/p>\n\n\n\n\nand<\/code>: Returns True<\/code> if both statements are true<\/li>\n\n\n\nor<\/code>: Returns True<\/code> if at least one statement is true<\/li>\n\n\n\nnot<\/code>: Reverses the logical state<\/li>\n<\/ul>\n\n\n\n9. How are functions defined in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Functions are defined using the def<\/code> keyword followed by the function name and parentheses.
Example:<\/p>\n\n\n\npythonCopyEditdef greet(name): \n return \"Hello, \" + name\n<\/code><\/pre>\n\n\n\n10. What is the difference between None<\/code> and False<\/code>?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\nNone<\/code> represents the absence of a value or a null object.<\/li>\n\n\n\nFalse<\/code> is a Boolean value.
While both evaluate to False<\/code> in conditional expressions, they are not equivalent.<\/li>\n<\/ul>\n\n\n\n11. What are Python keywords?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Keywords are reserved words in Python that have special meaning and cannot be used as variable names. Examples include if<\/code>, for<\/code>, while<\/code>, def<\/code>, class<\/code>, try<\/code>, return<\/code>, etc.<\/p>\n\n\n\n12. What is the purpose of the range()<\/code> function?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
The range()<\/code> function generates a sequence of numbers. It is commonly used for iteration in loops.
Example:<\/p>\n\n\n\nfor i in range(3):
print(i) # Output: 0, 1, 2
<\/code><\/pre>\n\n\n\n13. How is exception handling implemented in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Python uses the try<\/code>, except<\/code>, else<\/code>, and finally<\/code> blocks to handle exceptions.
Example:<\/p>\n\n\n\ntry:
result = 10 \/ 0
except ZeroDivisionError:
print(\"Cannot divide by zero.\")
<\/code><\/pre>\n\n\n\n14. What is the use of pass<\/code>, break<\/code>, and continue<\/code> in loops?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\npass<\/code>: A null statement, used as a placeholder.<\/li>\n\n\n\nbreak<\/code>: Terminates the loop entirely.<\/li>\n\n\n\ncontinue<\/code>: Skips the current iteration and moves to the next.<\/li>\n<\/ul>\n\n\n\n15. What is a string in Python and how is it declared?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
A string is a sequence of Unicode characters. It can be declared using single quotes ('text'<\/code>), double quotes (\"text\"<\/code>), or triple quotes for multi-line strings.
Example:<\/p>\n\n\n\nEditmessage = \"Welcome to Python\"
<\/code><\/pre>\n\n\n\nIntermediate-Level Python Interview Questions (16\u201330)<\/h3>\n\n\n\n16. What is the difference between deepcopy()<\/code> and copy()<\/code> in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\ncopy()<\/code> creates a shallow copy of an object\u2014modifications to nested objects will affect both copies.<\/li>\n\n\n\ndeepcopy()<\/code> creates a complete copy, including nested elements.
They are available via the copy<\/code> module:<\/li>\n<\/ul>\n\n\n\nimport copy
shallow = copy.copy(obj)
deep = copy.deepcopy(obj)
<\/code><\/pre>\n\n\n\n17. What are *args<\/code> and **kwargs<\/code> used for?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\n*args<\/code> allows a function to accept any number of positional arguments as a tuple.<\/li>\n\n\n\n**kwargs<\/code> allows a function to accept any number of keyword arguments as a dictionary.
They enhance flexibility in function definitions.
Example:<\/li>\n<\/ul>\n\n\n\ndef func(*args, **kwargs):
print(args, kwargs)
<\/code><\/pre>\n\n\n\n18. What is the difference between a module and a package in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong><\/p>\n\n\n\n\n- A module<\/strong> is a single Python file containing functions, classes, or variables.<\/li>\n\n\n\n
- A package<\/strong> is a directory that contains multiple modules and an
__init__.py<\/code> file to mark it as a package.<\/li>\n<\/ul>\n\n\n\n19. Explain Python\u2019s LEGB rule.<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
LEGB is the rule Python follows to resolve variable names:<\/p>\n\n\n\n\n- L<\/strong>: Local scope<\/li>\n\n\n\n
- E<\/strong>: Enclosing scope<\/li>\n\n\n\n
- G<\/strong>: Global scope<\/li>\n\n\n\n
- B<\/strong>: Built-in scope
Python searches for variables in this order.<\/li>\n<\/ul>\n\n\n\n20. What are list comprehensions in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
List comprehensions provide a concise way to create lists using a single line of code.
Example:<\/p>\n\n\n\nsquares = [x**2 for x in range(5)]
<\/code><\/pre>\n\n\n\n21. How is exception handling different from error suppression in Python?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Exception handling (try<\/code>\/except<\/code>) manages errors gracefully. Suppressing errors (e.g., using pass<\/code>) can hide bugs and should be avoided unless explicitly required.<\/p>\n\n\n\n22. What are lambda functions?<\/strong><\/h4>\n\n\n\nAnswer:<\/strong>
Lambda functions are anonymous, single-expression functions defined using the lambda<\/code> keyword.
Example:<\/p>\n\n\n\n