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Energy Exemplar Associate Software Engineer Interview Questions and Answers

Updated 4 Sep 2024

Energy Exemplar Associate Software Engineer Interview Experiences

1 interview found

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Aug 2024. There were 3 interview rounds.

Round 1 - Coding Test 

It was a mcq + coding round with computer fundamentals and aptitude + easy-medium level dsa questions.

Round 2 - Aptitude Test 

It was an offline aptitute test with 30 questions for 30 minutes.

Round 3 - Technical 

(4 Questions)

  • Q1. Detect a loop in the linked list
  • Ans. 

    Detect a loop in a linked list by using Floyd's Cycle Detection Algorithm

    • Use two pointers, slow and fast, to traverse the linked list

    • If there is a loop, the fast pointer will eventually meet the slow pointer

    • Initialize slow and fast pointers at the head of the linked list

    • Move slow pointer by one step and fast pointer by two steps in each iteration

    • If the fast pointer reaches the end of the list or meets the slow pointer,

  • Answered by AI
  • Q2. Find the unique element in an array
  • Ans. 

    Find the unique element in an array of strings

    • Iterate through the array and use a hashmap to store the frequency of each element

    • After iterating, check the hashmap for elements with frequency 1 to find the unique element

  • Answered by AI
  • Q3. Tell about your projects
  • Ans. 

    I have worked on various projects including a web application for a local business and a mobile app for tracking daily habits.

    • Developed a web application using HTML, CSS, and JavaScript for a local business to manage their inventory and sales.

    • Created a mobile app using React Native to track daily habits and provide reminders for healthy routines.

    • Collaborated with a team to implement new features and fix bugs in existin...

  • Answered by AI
  • Q4. Write a MySQL query for selecting the id of second highest salary from employee table
  • Ans. 

    MySQL query to select the id of second highest salary from employee table

    • Use ORDER BY clause to sort salaries in descending order

    • Use LIMIT to select the second row

    • Use a subquery to avoid duplicates if multiple employees have the same salary

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Energy Exemplar Associate Software Engineer interview:
  • RDBMS
  • Frontend
  • DSA
  • System Design

Skills evaluated in this interview

Interview questions from similar companies

I applied via Naukri.com and was interviewed in Jun 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. About projects

Interview Preparation Tips

Interview preparation tips for other job seekers - Be transparent and real. Don't bluff :)
Fingent has got a good number of people in the interview panel(my personal experience)
Even if you do not know the answer, the panel will explain it to you.

I appeared for an interview before Apr 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 90 minutes
Round difficulty - Easy

It was on online objective test consisting of 4 sections: Aptitude, Technical MCQs, Code snippet based MCQs and Coding part.

  • Q1. 

    Valid Parentheses Problem Statement

    Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.

    Input:

    The first line contains an...
  • Ans. 

    The task is to determine if a given string of parentheses is balanced or not.

    • Iterate through the characters of the string and use a stack to keep track of opening parentheses.

    • When encountering an opening parenthesis, push it onto the stack. When encountering a closing parenthesis, check if it matches the top of the stack.

    • If the stack is empty at the end or there are unmatched parentheses, the string is not balanced.

    • Exa...

  • Answered by AI
  • Q2. 

    Palindrome Linked List Problem Statement

    Determine if a given singly linked list of integers is a palindrome. Return true if it is a palindrome, otherwise return false.

    Example:

    Input:
    1 -> 2 -> ...
  • Ans. 

    Check if a given singly linked list of integers is a palindrome.

    • Use two pointers to find the middle of the linked list.

    • Reverse the second half of the linked list.

    • Compare the first half with the reversed second half to determine if it is a palindrome.

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was a technical and managerial round. The interviewer gave me a situation where I am in testing team and I found that customer requirement was drop down list at a place but developer has used bullet selection, and is not ready to change it. How will you manage? I gave some good replies and he was convinced.

  • Q1. What is a virtual function?
  • Ans. 

    A virtual function is a function in a base class that is declared using the keyword 'virtual' and can be overridden by a function with the same signature in a derived class.

    • Virtual functions allow for dynamic polymorphism in object-oriented programming.

    • They are used to achieve runtime polymorphism by enabling late binding.

    • Virtual functions are declared in a base class and can be overridden in derived classes.

    • Example: v...

  • Answered by AI
  • Q2. Can you explain how to perform a level order traversal of a binary tree in spiral form?
  • Ans. 

    Level order traversal of a binary tree in spiral form involves alternating between left and right while traversing each level.

    • Start by pushing the root node into a queue.

    • While the queue is not empty, pop a node, print its value, and push its children into the queue.

    • For each level, alternate between popping nodes from the queue and printing their values from left to right or right to left.

    • Continue this process until all

  • Answered by AI
  • Q3. What are abstract classes in C++?
  • Ans. 

    Abstract classes in C++ are classes that cannot be instantiated and are designed to be base classes for other classes.

    • Abstract classes may contain pure virtual functions, making them incomplete and unable to be instantiated.

    • Derived classes must implement all pure virtual functions from the abstract class in order to be concrete classes.

    • Abstract classes can have non-virtual functions and member variables like regular cl...

  • Answered by AI
Round 3 - Face to Face 

(6 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was also a technical round. He asked to optimize the code I wrote in coding round. Then he asked me a few puzzles and questions on OOPS, OS and DBMS.

  • Q1. Can you explain the ACID properties in the context of database management systems?
  • Ans. 

    ACID properties are a set of properties that guarantee the reliability of transactions in database management systems.

    • ACID stands for Atomicity, Consistency, Isolation, and Durability.

    • Atomicity ensures that either all operations in a transaction are completed successfully or none of them are.

    • Consistency ensures that the database remains in a consistent state before and after the transaction.

    • Isolation ensures that the e...

  • Answered by AI
  • Q2. What is the difference between paging and segmentation in operating systems?
  • Ans. 

    Paging and segmentation are memory management techniques in operating systems.

    • Paging divides physical memory into fixed-size blocks called pages, while segmentation divides logical memory into variable-size segments.

    • Paging allows for efficient memory allocation and management, while segmentation provides protection and sharing of memory.

    • Paging is simpler to implement but can lead to internal fragmentation, while segmen...

  • Answered by AI
  • Q3. What is concurrency control?
  • Ans. 

    Concurrency control is a technique used in databases to manage simultaneous access and modification of data by multiple users or processes.

    • Concurrency control ensures that transactions are executed in a way that maintains data consistency and integrity.

    • Techniques like locking, timestamp ordering, and optimistic concurrency control are used to implement concurrency control.

    • For example, in a banking system, concurrency c...

  • Answered by AI
  • Q4. What is the difference between String Buffer and String Builder in Java?
  • Ans. 

    String Buffer is synchronized and thread-safe, while String Builder is not synchronized and faster.

    • String Buffer is synchronized, making it thread-safe for use in multi-threaded environments.

    • String Builder is not synchronized, resulting in faster performance but not thread-safe.

    • String Builder is preferred for single-threaded operations, while String Buffer is preferred for multi-threaded operations.

  • Answered by AI
  • Q5. What are smart pointers in C++?
  • Ans. 

    Smart pointers in C++ are objects that act like pointers but provide automatic memory management.

    • Smart pointers help prevent memory leaks by automatically managing memory allocation and deallocation.

    • Examples include unique_ptr, shared_ptr, and weak_ptr.

    • unique_ptr is used for exclusive ownership, shared_ptr for shared ownership, and weak_ptr to prevent circular references.

  • Answered by AI
  • Q6. What is the difference between a mutex and a semaphore?
  • Ans. 

    Mutex is used for exclusive access to a resource, while semaphore is used for controlling access to a resource by multiple threads.

    • Mutex is binary and allows only one thread to access the resource at a time.

    • Semaphore can have a count greater than one, allowing multiple threads to access the resource simultaneously.

    • Mutex is typically used for protecting critical sections of code, while semaphore is used for synchronizat...

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAYodlee interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

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 interviewSelected

Skills evaluated in this interview

Interview Questionnaire 

3 Questions

  • Q1. Write a program for snake traversal of binary tree
  • Ans. 

    Program for snake traversal of binary tree

    • Use a stack to keep track of nodes to be visited

    • Start with the root node and push it onto the stack

    • While the stack is not empty, pop a node and print its value

    • If the level is even, push the left child first and then the right child onto the stack

    • If the level is odd, push the right child first and then the left child onto the stack

  • Answered by AI
  • Q2. To write code to check linked list is palindrome or not, in a single traversal and without using any other data structure
  • Ans. 

    Code to check if linked list is palindrome without using any other data structure and in a single traversal.

    • Traverse the linked list using two pointers, one slow and one fast

    • Reverse the first half of the linked list while traversing

    • Compare the reversed first half with the second half of the linked list

  • Answered by AI
  • Q3. Asked about OOPS concepts like abstraction, encapsulation, inheritance and polymorphism in detail and how they are implemented while programming

Interview Preparation Tips

Round: Test
Experience: It was on online objective test consisting of 4 sections: Aptitude, Technical MCQs, Code snippet based MCQs and Coding part.
Coding part had questions like balanced parenthesis check, etc.


Round: Technical Interview
Experience: Technical and managerial. Gave me a situation where I am in testing team and I found that customer requirement was drop down list at a place but developer has used bullet selection, and is not ready to change it. How will you manage? I gave some good replies and he was convinced.
Then he asked 25 horses puzzle (-----.php/puzzles/25-horses-3-fastest-5-races-puzzle/). I solved it.
He then asked me to code it. I wrote an algorithm first and then the code. He was very impressed.
He asked about virtual functions, abstract classes, pure virtual functions.


Round: Technical Interview
Experience: He asked to optimize the code I wrote in coding round.
Then he asked me candle puzzle on how to measure 30 min and 45 min.
Then he asked me the chocolate puzzle (-----.html).
What is paging and segmentation?
What are ACID properties in DBMS?
What is transaction and how is concurrency control done?
What is the difference between string builder and string buffer?
What is string pool in java?
What is JVM, JRE, JDK?
Differentiate between mutex and semaphore?
Can you override private and static members?
Contiguous and non-contiguous memory allocation?
What are Smart pointers?


Skills:
College Name: NIT Jalandhar

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
-
Result
No response

I applied via Approached by Company and was interviewed in Feb 2024. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Find the index of second maximum interger in a given array.
  • Ans. 

    Find the index of second maximum integer in a given array.

    • Iterate through the array to find the maximum integer.

    • Then iterate again to find the second maximum integer and return its index.

  • Answered by AI

Skills evaluated in this interview

Round 1 - Technical 

(1 Question)

  • Q1. Basics .net , c#, sql
Round 2 - Technical 

(1 Question)

  • Q1. Current Project Details, Roles and some technical questions too
Round 3 - HR 

(1 Question)

  • Q1. Package Discussion and Other basic details

Interview Preparation Tips

Interview preparation tips for other job seekers - Make sure your basics are strong and should be confident to explain about the current project and its technical details.
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Describe Life cycle in react
  • Ans. 

    React has three main phases in its lifecycle: mounting, updating, and unmounting.

    • Mounting: when a component is created and inserted into the DOM

    • Updating: when a component is updated due to changes in props or state

    • Unmounting: when a component is removed from the DOM

    • Lifecycle methods can be used to perform actions at each phase, such as componentDidMount() or componentWillUnmount()

    • React also has error handling methods,

  • Answered by AI
  • Q2. Explain strict mode in javascript and it's use
  • Ans. 

    Strict mode is a way to write secure and optimized JavaScript code.

    • Enables catching of silent errors

    • Disallows duplicate property names or parameters

    • Prevents use of undeclared variables

    • Makes `eval()` safer to use

    • Throws errors on invalid usage of `this` keyword

  • Answered by AI
Round 3 - Assignment 

CURD operations along with implementation of a mock UI

Interview Preparation Tips

Interview preparation tips for other job seekers - They are doing good job. If possible try to send a rejection mail along with the reason if candidate is not selected.

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Tell about Oops concepts
  • Ans. 

    OOPs concepts are fundamental principles in object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.

    • Inheritance: Allows a class to inherit properties and behavior from another class.

    • Encapsulation: Bundling data and methods that operate on the data into a single unit.

    • Polymorphism: Ability to present the same interface for different data types.

    • Abstraction: Hiding the complex imple...

  • Answered by AI
Round 3 - Technical 

(1 Question)

  • Q1. Will ask coding related
Round 4 - HR 

(1 Question)

  • Q1. What is Expected salary
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Not Selected

I applied via LinkedIn and was interviewed in Feb 2024. There were 3 interview rounds.

Round 1 - One-on-one 

(1 Question)

  • Q1. How to identify if a queue is circular
  • Ans. 

    A circular queue can be identified by checking if the rear pointer is one position behind the front pointer.

    • Check if rear pointer is one position behind front pointer

    • Check if front pointer is at index 0 and rear pointer is at index n-1 in an array of size n

    • Check if front pointer is at index rear+1 modulo n in an array of size n

  • Answered by AI
Round 2 - System design 

(1 Question)

  • Q1. Design notification system
  • Ans. 

    Design a notification system for a software application.

    • Identify the types of notifications needed (e.g. email, SMS, in-app)

    • Consider the frequency and urgency of notifications

    • Implement a notification queue to handle multiple notifications

    • Include user preferences for notification settings

    • Utilize push notifications for real-time updates

  • Answered by AI
Round 3 - Coding Test 

Write multiple polyfills for array

Skills evaluated in this interview

I applied via Walk-in and was interviewed before Oct 2021. There were 2 interview rounds.

Round 1 - Coding Test 

Good technical round, you can manage, mainly Java questions used to come

Round 2 - HR 

(2 Questions)

  • Q1. HR round is also good package discussion will happen
  • Q2. Company personal so kept secret

Interview Preparation Tips

Topics to prepare for Yodlee Senior Software Engineer interview:
  • Java
Interview preparation tips for other job seekers - With ML & advanced technology in working condition in place, they require less staffs

Energy Exemplar Interview FAQs

How many rounds are there in Energy Exemplar Associate Software Engineer interview?
Energy Exemplar interview process usually has 3 rounds. The most common rounds in the Energy Exemplar interview process are Coding Test, Aptitude Test and Technical.
How to prepare for Energy Exemplar Associate Software Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Energy Exemplar. The most common topics and skills that interviewers at Energy Exemplar expect are Data Structures, Agile, CSS3, Debugging and Front End.
What are the top questions asked in Energy Exemplar Associate Software Engineer interview?

Some of the top questions asked at the Energy Exemplar Associate Software Engineer interview -

  1. Write a MySQL query for selecting the id of second highest salary from employee...read more
  2. Detect a loop in the linked l...read more
  3. Find the unique element in an ar...read more

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Energy Exemplar Associate Software Engineer Interview Process

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Energy Exemplar Associate Software Engineer Salary
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₹8 L/yr - ₹13 L/yr
95% more than the average Associate Software Engineer Salary in India
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3.6

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3.2

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3.2

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3.2

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3.3

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