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Ernst & Young Technology Consultant Interview Questions and Answers
26 Interview questions
ggplot2 is a popular library for creating graphs in R.
ggplot2 is a powerful and flexible library for creating a wide range of graphs in R.
It allows for customization of almost every aspect of the graph.
Other popular graphing libraries in R include lattice and plotly.
Group Anagrams Together
Given an array/list of strings STR_LIST, group the anagrams together and return each group as a list of strings. Each group must contain strings that are anagrams of each other.
Ex...
Group anagrams in a list of strings together and return each group as a list of strings.
Iterate through the list of strings and sort each string alphabetically to identify anagrams.
Use a hashmap to group anagrams together based on their sorted versions.
Return the values of the hashmap as the grouped anagrams.
HashMap Implementation Problem Statement
Your task is to design a data structure that efficiently stores a mapping of keys to values and performs operations in constant time.
Explanation:
1. INSERT(key, ...Design a HashMap data structure with operations like INSERT, DELETE, SEARCH, GET, GET_SIZE, and IS_EMPTY.
Implement a hash table with efficient key-value mapping.
Ensure constant time complexity for operations.
Handle cases where key is not found or data structure is empty.
Example: INSERT('key1', 10), SEARCH('key1'), GET('key1'), DELETE('key1'), GET_SIZE(), IS_EMPTY()
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
Dependency injection helps in achieving loose coupling between classes.
It allows for easier testing by providing mock dependencies.
There are three types of dependency injection: constructor injection, setter injection, and interface injection.
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The @RestController annotation in Spring Boot is used to define a class as a RESTful controller.
Used to create RESTful web services in Spring Boot
Combines @Controller and @ResponseBody annotations
Eliminates the need for @ResponseBody annotation on each method
Returns data directly in the response body as JSON or XML
Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured setups.
Auto-configuration: Spring Boot automatically configures the application based on dependencies added to the project.
Embedded server: Spring Boot comes with an embedded Tomcat, Jetty, or Undertow server for easy deployment.
Actuator: Provides production-ready features like monitoring, metrics, and healt...
Java 8 streams are a sequence of elements that support functional-style operations.
Streams allow for processing sequences of elements in a functional way.
They can be created from various data sources like collections, arrays, or I/O channels.
Operations like filter, map, reduce, and collect can be performed on streams.
Streams are lazy, meaning intermediate operations are only executed when a terminal operation is c...
Java 8 program to iterate through a Stream using forEach method
Create a Stream of elements using Stream.of() or any other method
Use the forEach() method to iterate through the Stream and perform an action on each element
Example: Stream.of(1, 2, 3, 4, 5).forEach(System.out::println);
Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured settings and tools.
Spring Boot eliminates the need for manual configuration by providing defaults for most settings.
It includes embedded servers like Tomcat, Jetty, or Undertow, making it easy to run applications as standalone JAR files.
Spring Boot also offers production-ready features like metrics, health c...
MVC in Spring is a design pattern that separates an application into three main components: Model, View, and Controller.
Model represents the data and business logic of the application.
View is responsible for rendering the user interface based on the data from the Model.
Controller acts as an intermediary between Model and View, handling user input and updating the Model accordingly.
Spring MVC provides annotations l...
Ernst & Young Technology Consultant Interview Experiences
24 interviews found
Anonymous
Selected
I applied via Referral and was interviewed in Sep 2024. There were 3 interview rounds.
(4 Questions)
- Q1. Past Experience and work I performed in the Data Analytic team
- Ans.
I have 3 years of experience working in the Data Analytic team where I analyzed large datasets to provide insights and recommendations.
Performed data cleaning and preprocessing tasks to ensure data accuracy
Utilized statistical analysis and machine learning techniques to extract valuable information
Created data visualizations and reports to communicate findings to stakeholders
- Q2. Power BI- DAX functions, Refresh Rates, Cardinality, Uses of several graphs, KPIs, Reporting
- Q3. SQL- Uses of several functions, intermediate logics asked, Eg- Finding 2nd highest salary, function of RankX, Window functions
- Q4. Data Cleansing and ways to analyse data
- Ans.
Data cleansing involves identifying and correcting errors in data to improve its quality. Ways to analyze data include using statistical methods, data visualization, and machine learning algorithms.
Identify and remove duplicate records
Standardize data formats and values
Fill in missing values using imputation techniques
Use data profiling to understand data quality issues
Apply data validation rules to ensure accuracy
Util...
(1 Question)
- Q1. Raw data was provided and a proper PBI report was asked to be designed.
(2 Questions)
- Q1. Expected Salary and why you find yourself fitting for the role?
- Q2. Working in a Big4 can be overwhelming at times, how would you deal with it as you have already worked for one.
- Ans.
I would deal with the overwhelming nature of working in a Big4 by prioritizing tasks, seeking support from colleagues, and practicing self-care.
Prioritize tasks based on deadlines and importance to avoid feeling overwhelmed
Seek support from colleagues or mentors to discuss challenges and brainstorm solutions
Practice self-care activities such as exercise, meditation, or hobbies to manage stress and maintain work-life ba...
Basic aptitude and coding
(1 Question)
- Q1. What is denormalization and explanation of projects
- Ans.
Denormalization is the process of adding redundant data to a database to improve read performance.
Denormalization involves duplicating data from normalized tables into a single denormalized table.
It can improve query performance by reducing the need for joins and aggregations.
Denormalization is often used in data warehousing and reporting applications.
Examples of denormalization include creating summary tables or addin...
(1 Question)
- Q1. Introduction, why ey
(1 Question)
- Q1. Mcqs based on oops, coding
(1 Question)
- Q1. Normal technicall question on c++
(1 Question)
- Q1. Tell about yourself, why would you like to join e&y
pppp kkk
Selected
I applied via Campus Placement and was interviewed in Jan 2024. There were 4 interview rounds.
Aptitude Test was fairly moderate. There were questions which are quite easy and there were 4/5 question which were tricky and those decided the cutoff.
Two questions were asked. One was string manipulation and another was dynamic programming. Nothing too crazy, the questions were solvable.
In my Group Discussion Round, our group asked to introduce ourselves. The selection happened based on how well you can introduce yourself. They were looking for professional background, personal and social background.
(1 Question)
- Q1. I was asked questions based on my projects that i have done and was asked to explain those. and there were questions on case study. My interviewer was very friendly, hew keenly listening to what i was sayi...
Interview Preparation Tips
Be prepared and concise with your cv.
Be open minded to approach a problem. At least make an attempt to solve the question.
Be thorough with DSA.
(1 Question)
- Q1. In depth Java questions
(1 Question)
- Q1. In depth Java coding questions and theory
(1 Question)
- Q1. Salary expectations
(3 Questions)
- Q1. What do you understand about tech consultants?
- Q2. What is data privacy
- Ans.
Data privacy refers to the protection of personal information from unauthorized access or disclosure.
Data privacy involves controlling who has access to personal information
It includes ensuring that data is securely stored and transmitted
Examples include encryption, access controls, and data anonymization
- Q3. What is cloud computing
- Ans.
Cloud computing is the delivery of computing services over the internet, including storage, databases, networking, software, and more.
Allows users to access and store data and applications on remote servers instead of on their local devices
Provides scalability, flexibility, and cost-effectiveness for businesses
Examples include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform
Interview Preparation Tips
Understand Business needs
Communication skills
Skills evaluated in this interview
Selected
I applied via Naukri.com and was interviewed before Sep 2023. There were 2 interview rounds.
(1 Question)
- Q1. Prototypal inheritance, promises, hoisting
(1 Question)
- Q1. Salary expectations, strengths, weakness
Interview Preparation Tips
- Mean Stack
Snowflake aptitude test for professional experience
(1 Question)
- Q1. Snowflake architecture
Abhishek Srivastava
Selected
I appeared for an interview before May 2024, where I was asked the following questions.
- Q1. Why you join EY ?
- Ans.
I want to join EY for its innovative culture, commitment to professional growth, and the opportunity to work on impactful projects globally.
EY's reputation for innovation aligns with my passion for leveraging technology to solve complex business challenges.
The firm's commitment to continuous learning and development, such as the EYU platform, excites me as I seek to enhance my skills.
Working on diverse projects across ...
- Q2. What is the expextion from our side
- Ans.
Expectations from your side include collaboration, clear communication, and a focus on innovative solutions to meet client needs.
Collaboration: Work closely with your team to understand project goals and deliverables.
Clear Communication: Maintain open lines of communication to ensure alignment on expectations and progress.
Innovative Solutions: Provide creative and effective technology solutions tailored to client requi...
Interview Preparation Tips
Selected
I applied via LinkedIn and was interviewed before May 2023. There were 2 interview rounds.
(3 Questions)
- Q1. Output based questions
- Q2. Basics of Node js
- Q3. One programming question
(2 Questions)
- Q1. Questions based in MongoDb like indexing, aggregate and pipeline
- Q2. How do you detect and handle memory leak in node js
- Ans.
Detecting and handling memory leaks in Node.js involves using tools like heap snapshots and monitoring memory usage.
Use tools like heap snapshots to identify memory leaks
Monitor memory usage over time to detect abnormal increases
Implement proper garbage collection strategies to free up memory
Avoid creating unnecessary closures or retaining references to objects
Skills evaluated in this interview
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