10+ Interview Questions and Answers

Program to reverse a string without using inbuilt methods

• Create an empty string to store the reversed string

• Loop through the original string from the end to the beginning

• Add each character to the empty string

• Return the reversed string

Python data structures include lists, tuples, sets, and dictionaries. OOPs is a programming paradigm.

• Python data structures are used to store and organize data in a program

• Lists are ordered and mutable, tuples are ordered and immutable, sets are unordered and unique, and dictionaries are unordered key-value pairs

• OOPs is a programming paradigm that focuses on creating objects that have properties and methods

• In Python, classes are used to create objects and encapsulate data and...read more

Decorator is a design pattern that allows behavior to be added to an individual object, either statically or dynamically.

• Decorator pattern involves a set of decorator classes that are used to wrap concrete components.

• Decorators provide a flexible alternative to subclassing for extending functionality.

• An example of decorator pattern is adding toppings to a pizza. Each topping is a decorator that wraps the pizza object.

• Another example is adding borders, shadows, and other effec...read more

CRUD operations in Python can be performed using various libraries and frameworks.

• Use SQLalchemy ORM for database operations

• Use Flask or Django for building web applications

• Use pandas library for data manipulation

• Use file handling functions for file operations

There are two types of paths - relative and absolute. Both are used depending on the context.

• Relative paths are used to navigate within the current directory or subdirectories.

• Absolute paths are used to navigate to a specific location in the file system.

• Examples of relative paths: './file.txt', '../folder/file.txt'

• Examples of absolute paths: '/home/user/file.txt', 'C:/Users/user/Documents/file.txt'

A program to create a list from a given dictionary.

• Iterate through the dictionary and append each key-value pair to a list.

• Use list comprehension to create a list from the dictionary.

• Sort the list based on keys or values if required.

Pickling is the process of converting a Python object into a byte stream, while unpickling is the reverse process.

• Pickling is used to store Python objects in a file or transfer them over a network.

• Unpickling is used to retrieve the original Python object from the stored byte stream.

• The pickle module in Python is used for pickling and unpickling.

• Example: Pickling a list - pickle.dump([1, 2, 3], open('data.pkl', 'wb'))

• Example: Unpickling a list - pickle.load(open('data.pkl', 'r...read more

Deep copy creates a new object with the same values as the original, while shallow copy creates a new object with references to the original's values.

• Deep copy duplicates all nested objects and their values, while shallow copy only duplicates the top-level object.

• Deep copy is more memory-intensive and time-consuming than shallow copy.

• Example of deep copy: copying a list of dictionaries using deepcopy() in Python.

• Example of shallow copy: copying a list using slice notation in ...read more

Django follows Model-View-Controller (MVC) architectural pattern.

• Django has a high-level architecture that follows the Model-View-Controller (MVC) architectural pattern.

• The Model layer represents the database schema and business logic.

• The View layer handles the presentation logic and renders the templates.

• The Controller layer acts as an intermediary between the Model and View layers.

• Django also includes a URL routing system and middleware for handling HTTP requests and respon...read more