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Jio Platforms Backend Developer Interview Questions and Answers

Updated 4 Apr 2022

Jio Platforms Backend Developer Interview Experiences

2 interviews found

I appeared for an interview before Apr 2021.

Round 1 - Video Call 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was a technical interview round with questions on DSA and databases. A discussion on projects was also done.

  • Q1. 

    Reverse Rows of a Matrix Problem Statement

    You are given a matrix and tasked with reversing the order of elements in each row. This needs to be done for every row in the matrix.

    Help a participant named ...

  • Ans. 

    Reverse the order of elements in each row of a given matrix.

    • Iterate through each row of the matrix

    • Reverse the elements in each row

    • Return the modified matrix

  • Answered by AI
  • Q2. What is the difference between SQL and NoSQL databases?
  • Ans. 

    SQL databases are relational databases with structured data, while NoSQL databases are non-relational databases with flexible schema.

    • SQL databases use structured query language for defining and manipulating data, while NoSQL databases use different query languages or APIs.

    • SQL databases are table-based, with a predefined schema, while NoSQL databases are document, key-value, wide-column, or graph-based, with dynamic sch...

  • Answered by AI
  • Q3. What is an aggregate function?
  • Ans. 

    An aggregate function is a function where the values of multiple rows are grouped together to form a single summary value.

    • Used in SQL to perform calculations on sets of values

    • Examples include SUM, AVG, COUNT, MIN, MAX

    • Can be used with GROUP BY clause to group results

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAJio Platforms Limited interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, SQL Databases, OOPS, AptitudeTime required to prepare for the interview - 5 monthsInterview preparation tips for other job seekers

Tip 1 : Keep your basics strong for SQL databases. Aggregation queries, inner join, outer join(s).
Tip 2 : Have basic programming knowledge, you may not know an optimum solution but you should be able to answer to problem correctly. 
Tip 3 : Revise object oriented programming concepts, conceptual questions on how a particular language works in environment.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewRejected

Skills evaluated in this interview

I applied via jio website and was interviewed before Jun 2020. There was 1 interview round.

Interview Questionnaire 

3 Questions

  • Q1. Reverse a matrix.
  • Ans. 

    Reverse a matrix by swapping rows with columns.

    • Create a new matrix with the same number of columns and rows as the original matrix.

    • Loop through each row and column of the original matrix.

    • Swap the values of the current row and column with the values of the current column and row in the new matrix.

    • Return the new matrix.

  • Answered by AI
  • Q2. Aggregate query on mysql. Difference between sql and nosql databases.
  • Ans. 

    Aggregate queries in MySQL and differences between SQL and NoSQL databases.

    • Aggregate queries in MySQL are used to perform calculations on data and return a single value.

    • SQL databases are relational and use structured data while NoSQL databases are non-relational and use unstructured data.

    • SQL databases are better suited for complex queries and data consistency while NoSQL databases are better for scalability and flexibi...

  • Answered by AI
  • Q3. Question(s) related to projects.

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep your basics strong for SQL databases. Aggregation queries, inner join, outer join(s). Have basic programming knowledge, you may not know an optimum solution but you should be able to answer to problem correctly. Object oriented programming concepts. Conceptual questions on how a particular language works in environment.

Skills evaluated in this interview

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I applied via Naukri.com and was interviewed in Oct 2021. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Java,Spring,hibernate,SQL

Interview Preparation Tips

Interview preparation tips for other job seekers - They waste candidate's time. They take interviews, you get selected, by the time they should release offer letter, they say that you have to attend one more round to another client, they take again interview and say you are selected. Again by the time they should release offer letter, they say you another 2 more round are there and if you clear them them they will release offer letter. They will never release offer letter. Giving interviews to Mphasis is never ending process and they will never release offer letter. You will get better offers from other companies. Don't waste time giving interviews to Mphasis.
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

DSA - STRING AND ARRAY QUESTION

Interview Preparation Tips

Interview preparation tips for other job seekers - go well prepared they will ask sometime DSA & some time question would be from your resume

Interview Preparation Tips

Round: Test
Experience: Technical sections had questions from almost all the sections through AMCAT(C, C++, DBMS, DS, OS)(level :moderate)Quantitative aptitude’s questions were good.. All were almost of R. S. Aggarwal level though few exceptions were there tooLogical reasoning and verbal ability was good.. Some questions were tough.

Round: HR Interview
Experience: Overall enjoyed. But not selected because of my less market knowledge.

College Name: NA

Interview Questionnaire 

4 Questions

  • Q1. Explain Network Layers?
  • Ans. 

    Network layers are a hierarchical way of organizing communication protocols.

    • Network layers provide a modular approach to networking.

    • Each layer has a specific function and communicates with adjacent layers.

    • The OSI model has 7 layers, while the TCP/IP model has 4 layers.

    • Examples of layers include the physical layer, data link layer, network layer, transport layer, and application layer.

  • Answered by AI
  • Q2. What is a Dead Lock?
  • Ans. 

    Deadlock is a situation where two or more processes are unable to proceed because they are waiting for each other to release resources.

    • Occurs in multi-threaded/multi-process environments

    • Can lead to system freeze or crash

    • Prevention techniques include resource ordering and timeouts

    • Example: Process A holds resource X and waits for resource Y, while Process B holds resource Y and waits for resource X

  • Answered by AI
  • Q3. Explain Paging and Segmentation
  • Ans. 

    Paging and Segmentation are memory management techniques used by operating systems.

    • Paging divides memory into fixed-size pages and stores them in physical memory.

    • Segmentation divides memory into logical segments and stores them in physical memory.

    • Paging allows for efficient use of physical memory and reduces fragmentation.

    • Segmentation allows for protection and sharing of memory between processes.

    • Examples of operating s...

  • Answered by AI
  • Q4. Pirates of different ages have a treasure of 100 gold coins. On their ship, they decide to split the coins using this scheme: The oldest pirate proposes how to share the coins, the OTHER pirates (not inc...

Interview Preparation Tips

Round: Test
Experience: It would quite a simple test, covering basic questions from general mathematics and algebra
Tips: Practice "Aptitude" on daily basis

Round: Technical Interview
Experience: Technical Interview in sapient will be quite related to understand of your basic concepts. The round also includes Puzzles. Try Practising some random puzzles from internet.
Tips: Be active and Interactive. Even, if you do not know the answer, try explaining your approach. That would get you marks.

Round: HR Interview
Experience: The HR carries larger wait-age in Sapient. Do not panic. He will give you enough time to settle down by asking background questions. He will only try to analyse the kind of person you are. Be true to yourself and your are sure to be successful

Skills: Basic Concepts of Launguages, Operating System, Networks
College Name: NIT JALANDHAR

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. Questions based on previous written test are asked. Most common being to optimize the solution further

Interview Preparation Tips

Round: Test
Experience: The quantitative section was tougher than usual. There were tricky questions from Trigonometry and Mensuration.
3 Coding Questions were asked. Any programming language including pseudo-code was allowed.
String Manipulation seemed to be a favorite topic
Tips: Go through formulas and shortcuts for the Quantitative Section
Duration: 120 minutes
Total Questions: 40

Round: Test
Experience: 3 Questions. 30 minutes for each. This test was at the company premises.
Tips: Try to have more than one approach figured out.
Duration: 90 minutes
Total Questions: 3

Round: Technical Interview
Experience: Nice and Interactive interview. Interview to test flexibility in approach.

General Tips: Try to communicate well with the Interviewer. Don't hesitate in asking for feedback and advice after the interview is over with.
Skills: Coding, Problem Solving
College Name: NIT BHOPAL

Interview Questionnaire 

17 Questions

  • Q1. Tell me about yourself?
  • Ans. 

    I am a software developer with experience in multiple programming languages and a passion for problem-solving.

    • Experienced in Java, C++, and Python

    • Strong knowledge of data structures and algorithms

    • Proficient in web development using HTML, CSS, and JavaScript

    • Familiar with agile development methodologies

    • Excellent problem-solving and analytical skills

  • Answered by AI
  • Q2. Define Automation framework?
  • Ans. 

    Automation framework is a set of guidelines, standards, and coding practices used to create automated test scripts.

    • It provides a structured way to develop and maintain automated tests

    • It includes tools, libraries, and reusable components

    • It helps in reducing the time and effort required for testing

    • Examples include Selenium, Appium, and Robot Framework

  • Answered by AI
  • Q3. Difference between High severity and low severity with example, what is important as QA point of view?
  • Ans. 

    High severity refers to critical defects that impact the core functionality of the software, while low severity refers to minor issues that have minimal impact on functionality.

    • High severity issues can cause the software to crash or result in data loss.

    • Low severity issues are cosmetic or minor usability problems.

    • From a QA point of view, high severity issues are more critical as they can significantly impact the user ex...

  • Answered by AI
  • Q4. There one form where username and password and remember-me field is given, write the test scenarios?
  • Q5. Around 5-6 more questions
  • Q6. Automation architecture?
  • Q7. Difference between class and interface?
  • Ans. 

    Class is a blueprint for creating objects while interface defines a contract for classes to implement.

    • A class can have attributes and methods while an interface only has method signatures.

    • A class can be instantiated while an interface cannot.

    • A class can only inherit from one class while it can implement multiple interfaces.

    • Example: Class - Animal, Interface - Flyable

    • Animal can have attributes like name, age, etc. and m...

  • Answered by AI
  • Q8. What is static keyword?
  • Ans. 

    Static keyword is used to declare a variable or method that belongs to the class rather than an instance of the class.

    • Static variables are shared among all instances of a class

    • Static methods can be called without creating an instance of the class

    • Static blocks are used to initialize static variables

    • Static keyword can also be used to create nested classes

    • Example: public static int count;

  • Answered by AI
  • Q9. What are the different access modifiers and what is there uses?
  • Ans. 

    Access modifiers control the visibility and accessibility of class members.

    • Public: accessible from anywhere

    • Private: accessible only within the class

    • Protected: accessible within the class and its subclasses

    • Default: accessible within the same package

    • Used to enforce encapsulation and prevent unauthorized access

  • Answered by AI
  • Q10. Difference between interface and abstract?
  • Ans. 

    Interface defines only method signatures while abstract class can have both method signatures and implementations.

    • An interface can be implemented by multiple classes while an abstract class can only be extended by one class.

    • An abstract class can have constructors while an interface cannot.

    • An abstract class can have instance variables while an interface cannot.

    • An abstract class can provide default implementations for so...

  • Answered by AI
  • Q11. Write a program for given login scenario using defined automation architecture?
  • Ans. 

    A program for login scenario using defined automation architecture.

    • Identify the elements on the login page such as username, password, and login button

    • Use automation tools like Selenium to interact with the elements and input data

    • Verify successful login by checking for expected elements on the landing page

    • Implement error handling for incorrect login credentials

    • Use a modular and scalable architecture for maintainability

  • Answered by AI
  • Q12. Take an array, store the numbers and print the numbers using arrayList?
  • Ans. 

    To store and print numbers from an array using arrayList.

    • Create an arrayList object

    • Loop through the array and add each element to the arrayList using add() method

    • Print the arrayList using toString() method

    • Example: int[] arr = {1, 2, 3}; ArrayList list = new ArrayList<>(); for(int num : arr) { list.add(num); } System.out.println(list.toString());

Answered by AI
  • Q13. Write test scenario for download functionality of a songs website?
  • Ans. 

    Test scenario for download functionality of a songs website

    • Verify that the download button is visible and clickable

    • Check that the downloaded file is in the correct format

    • Ensure that the downloaded file is not corrupted

    • Test the download speed for different file sizes

    • Verify that the download progress is displayed to the user

  • Answered by AI
  • Q14. Difference between cache and cookies?
  • Ans. 

    Cache stores data temporarily to reduce server load while cookies store user information for website personalization.

    • Cache stores frequently accessed data to reduce server load and improve website performance.

    • Cookies store user information such as login credentials, preferences, and shopping cart items.

    • Cache is temporary and can be cleared at any time, while cookies can have an expiration date.

    • Cache is stored on the us...

  • Answered by AI
  • Q15. Solve the aptitude questions(2 – 3), she wanted to see the approach?
  • Q16. Make a 3*3 cube where you need to fill the numbers using 1-9, rows, columns and diagonal sum should be equal to 15
  • Q17. One more puzzle
  • Interview Preparation Tips

    Round: Test
    Total Questions: 2

    General Tips: Interview Experience was very good
    Skills: Algorithm, data structure
    College Name: na

    Skills evaluated in this interview

    Interview Questionnaire 

    9 Questions

    • Q1. Input an array and then print the repeating characters?? Example: Input:1,3,23,11,44,3,23,2,3. Output:3,23
    • Ans. 

      The question asks to input an array and print the repeating characters.

      • Iterate through the array and store each element in a hash table or dictionary.

      • If an element already exists in the hash table, it is a repeating character.

      • Print all the repeating characters found.

    • Answered by AI
    • Q2. Input an array and prints the second minimum in an array?? Example Input:34,45,21,12,54,67,15 Output:15
    • Ans. 

      Program to find the second minimum in an array.

      • Sort the array and return the second element.

      • Initialize two variables to store minimum and second minimum values.

      • Loop through the array and update the variables accordingly.

    • Answered by AI
    • Q3. Find the longest palendrom in a string? Example Input: abfgerccdedccfgfer Output: ccdedcc
    • Ans. 

      To find the longest palindrome in a given string.

      • Iterate through the string and check for palindromes of odd and even lengths.

      • Keep track of the longest palindrome found so far.

      • Use two pointers to check if the substring is a palindrome.

      • If the substring is a palindrome and its length is greater than the current longest palindrome, update the longest palindrome.

    • Answered by AI
    • Q4. Input a number and then find the next higher number such that for both the number (inputted and the next higher number) in binary representation contains equal number os ones. Example: Input:3(000000000000...
    • Ans. 

      Find the next higher number with equal number of ones in binary representation.

      • Convert input number to binary

      • Count number of ones in binary representation

      • Increment input number until binary representation has equal number of ones

      • Convert incremented number to decimal

    • Answered by AI
    • Q5. An array contain 6 different numbers, only 1 number is repeated for 5 times. So now total 10 numbers in array, Find that duplicate number in 2 steps only?
    • Ans. 

      Find the duplicate number in an array of 10 numbers with only 2 steps.

      • Use a hash set to keep track of visited numbers.

      • Iterate through the array and check if the number is already in the set.

      • If it is, then it is the duplicate number.

      • If not, add it to the set.

      • At the end, the duplicate number will be found.

    • Answered by AI
    • Q6. Write a program to print elements of a linked list in reverse order by using same single linked list?
    • Ans. 

      Program to print elements of a linked list in reverse order using same single linked list

      • Traverse the linked list and push each element onto a stack

      • Pop elements from the stack and print them in reverse order

    • Answered by AI
    • Q7. Questions on improving complexity of questions given in coding round
    • Q8. Html tags & ct their no of occurance of each tag & also check whether it correct or not?
    • Ans. 

      To check the occurrence and correctness of HTML tags, we can use various tools and techniques.

      • One way is to use a browser's developer tools to inspect the HTML code and see the tags and their frequency.

      • Another way is to use an online HTML validator tool that checks for correct syntax and tag usage.

      • We can also use programming languages like Python to parse HTML and count the occurrence of each tag.

      • Regular expressions ca...

    • Answered by AI
    • Q9. Few questions were on database tables and sql queries?

    Interview Preparation Tips

    Skills: Algorithm, data structures
    College Name: na

    Skills evaluated in this interview

    Interview Preparation Tips

    Round: HR Interview
    Experience: This interview is meant to check candidate's background and candidates's interest towards the company.

    College Name: NIT BHOPAL

    Jio Platforms Interview FAQs

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    ₹4.7 L/yr - ₹10.5 L/yr
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