TradeIndia (Infocom Network Private Limited) Software Developer Interview Questions, Process, and Tips

Q1. Nth maximum element in an array with efficiency O(n) time
Ans. 
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
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Q2. Python specific generator , decorator etc
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Few medium coding questions

Q1. What is difference between list and tuple?
Ans. 
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 an...read more
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Q2. Find second highest salary of employee using django orm?
Ans. 
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)
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Q3. Find no of occurance in list output in dict
Ans. 
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.
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Q4. What is django middleware?
Ans. 
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 Authentication...read more
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Q5. What is decorator?
Ans. 
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.
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Q6. What is generator?
Ans. 
A generator is a function that can be paused and resumed, allowing it to produce a sequence of values over time.
• Generators are defined using the function* syntax in JavaScript.

• They use the yield keyword to pause execution and return a value.

• Generators can be iterated over using a for...of loop.

• They are useful for generating infinite sequences or lazily computing values.
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