Hughes & Hughes Chem Limited Interview Questions and Answers

List is mutable and can be modified, while tuple is immutable and cannot be modified.

• List is defined using square brackets [], while tuple is defined using parentheses ().

• Elements in a list can be added, removed, or modified, while elements in a tuple cannot be modified.

• Lists are typically used for collections of similar items, while tuples are used for collections of different items.

• Lists have more built-in methods and functions compared to tuples.

• Lists are generally used wh...read more

Find second highest salary of employee using Django ORM.

• Use the Django ORM to query the Employee model

• Order the employees by salary in descending order

• Skip the first employee (highest salary) and get the second employee (second highest salary)

Find the nth maximum element in an array efficiently in O(n) time

• Iterate through the array once to find the maximum element

• Repeat the process n times to find the nth maximum element

• Use a variable to keep track of the current maximum element

The question asks to find the number of occurrences of each element in a list and output the result in a dictionary.

• Iterate through the list and use a dictionary to keep track of the count of each element.

• If an element is already in the dictionary, increment its count by 1. Otherwise, add it to the dictionary with a count of 1.

• Finally, return the dictionary with the counts of each element.

Django middleware is a component that sits between the web server and the view, allowing for processing of requests and responses.

• Middleware is a way to modify or process requests and responses globally in a Django application.

• It can be used for authentication, session management, caching, logging, and more.

• Middleware classes are defined in settings.py and executed in order.

• Examples of middleware include AuthenticationMiddleware, SessionMiddleware, and CsrfViewMiddleware.

A decorator is a design pattern that allows behavior to be added to an individual object dynamically.

• Decorators enhance the functionality of an object without modifying its structure.

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

• Decorators can be stacked to add multiple behaviors to an object.

• Examples of decorators include logging, caching, and authentication decorators.