20+ Jio Platforms Interview Questions and Answers for Freshers

Count the total number of distinct subarrays with at most K odd elements in an array.

• Iterate through all subarrays and count the number of odd elements in each subarray.

• Use a hashmap to keep track of the count of distinct subarrays with at most K odd elements.

• Return the total count of distinct subarrays for each test case.

Yes, it is possible to implement stack using queues.

• Implement push operation by enqueueing elements to the queue.

• Implement pop operation by dequeuing all elements except the last one and enqueueing them again.

• The last element in the queue will be the top element of the stack.

• Example: Queue: 1 2 3 4 5, Stack: 5 4 3 2 1

Recursion is a process in which a function calls itself. Time and space complexity are important factors to consider while using recursion.

• Recursion is used to solve problems that can be broken down into smaller sub-problems.

• It involves a base case and a recursive case.

• Time complexity refers to the amount of time taken by an algorithm to run, while space complexity refers to the amount of memory used by an algorithm.

• Recursion can have high time and space complexity, so it's i...read more

Frontend is the part of a website or application that users interact with. Node.js is a JavaScript runtime environment.

• Frontend refers to the user interface and user experience of a website or application.

• It includes the design, layout, and functionality of the website or application.

• Node.js is a JavaScript runtime environment that allows developers to run JavaScript on the server-side.

• It is commonly used for building scalable and high-performance web applications.

• Node.js can...read more

List and tuple are both data structures in Python, but list is mutable while tuple is immutable.

• 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 used for collections of data that may change over time, while tuples are used for fixed collections of data.

• Lists are generally faster for iteration and appending, while tuples are faster ...read more

The marquee tag is used in HTML to create a scrolling text or image effect on a webpage.

• Used to create a scrolling effect for text or images on a webpage

• Can specify direction, speed, and behavior of the scrolling

• Example: <marquee behavior='scroll' direction='left'>Scrolling text</marquee>

Constructors and destructors are special member functions in object-oriented programming languages.

• Constructors are used to initialize the object's data members when an object is created.

• Destructors are used to free up the memory allocated to the object when it is destroyed.

• Constructors have the same name as the class and no return type.

• Destructors have the same name as the class preceded by a tilde (~) and no return type.

• Example: class Car { public: Car(); ~Car(); };

• Construc...read more

Finding nth smallest and largest element in an array

• Sort the array and return the nth smallest/largest element

• Use quickselect algorithm for optimal solution

• For nth smallest element, partition the array around pivot until pivot index is n-1

• For nth largest element, partition the array around pivot until pivot index is len(array)-n

• Handle edge cases like n being greater than array length

Data types in Python are the classification of data items that determine the operations that can be performed on them.

• Python has several built-in data types such as integers, floats, strings, booleans, and complex numbers.

• Lists, tuples, and dictionaries are also data types in Python.

• Each data type has its own set of operations that can be performed on it.

• For example, arithmetic operations can be performed on integers and floats, but not on strings.

• Boolean data types can only ...read more

DBMS is used to manage and organize large amounts of data efficiently.

• DBMS provides a centralized and secure way to store and retrieve data.

• It allows multiple users to access and modify data simultaneously.

• It ensures data integrity and consistency through various constraints and rules.

• It provides backup and recovery mechanisms to prevent data loss.

• Examples of DBMS include Oracle, MySQL, SQL Server, and PostgreSQL.

A foreign key is a column or set of columns in a database table that refers to the primary key of another table.

• It establishes a link between two tables

• It ensures referential integrity

• It helps in maintaining data consistency

• Example: CustomerID in Orders table refers to Customer table's primary key

Python is a dynamically typed, interpreted language while Java is a statically typed, compiled language.

• Python is easier to learn and write code quickly.

• Java is more efficient and faster due to its compilation process.

• Python is better for data analysis and machine learning while Java is better for enterprise applications.

• Python has a simpler syntax and is more readable while Java has a more complex syntax.

• Python has a larger library of pre-built modules while Java has a large...read more

Check if the binary representation of a given integer is a palindrome.

• Convert the integer to binary representation.

• Check if the binary representation is a palindrome by comparing it with its reverse.

• Return true if it is a palindrome, false otherwise.

Given an array of integers, remove K elements from either end to maximize sum of remaining elements.

• Iterate through all possible combinations of removing K elements from start and end

• Calculate sum of remaining elements for each combination

• Return the maximum sum obtained

Check if a given array contains a valid triplet where two elements sum up to the third.

• Iterate through all possible triplets in the array and check if any of the conditions are satisfied.

• Use nested loops to compare each element with every other element in the array.

• Handle cases where the elements are not distinct by ensuring i != j, j != k, and i != k.

Check if a given matrix is idempotent by verifying if M * M equals M.

• Calculate the product of the matrix with itself and compare it with the original matrix.

• If the product equals the original matrix, then it is idempotent.

• Iterate through the matrix elements to perform the necessary calculations.

Reverse words in a string word by word, removing leading/trailing spaces and extra spaces between words.

• Split the input string by spaces to get individual words

• Reverse the order of the words

• Join the reversed words with a single space in between

• Remove any leading or trailing spaces

Find the second largest element in an array of integers. Return -1 if second largest does not exist.

• Iterate through the array to find the largest and second largest elements.

• Handle cases where all elements are identical by returning -1.

• Consider edge cases like empty array or array with less than 2 elements.

Reinforcement learning is a type of machine learning where an agent learns to make decisions by receiving feedback from its environment.

• In reinforcement learning, an agent interacts with an environment by taking actions and receiving rewards or penalties.

• The goal is for the agent to learn the optimal strategy to maximize cumulative rewards over time.

• Examples include training a computer program to play games like chess or Go, or optimizing a robot's movements in a physical env...read more

Market research helps businesses understand their target audience, competition, and market trends to make informed decisions.

• Identify target audience preferences and behaviors

• Analyze competitors' strategies and positioning

• Track market trends and consumer preferences

• Measure effectiveness of marketing campaigns

• Identify new opportunities for growth