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Identify the first duplicate integer in an array efficiently using a set.
Use a set to track seen integers as you iterate through the array.
For each integer, check if it is already in the set.
If it is, return that integer as the first duplicate.
If not, add it to the set and continue.
Example: For array [2, 3, 1, 2, 4], the first duplicate is 2.
Data analysts interpret complex data to help organizations make informed decisions and improve performance.
Collect and clean data from various sources, e.g., databases, surveys.
Analyze data using statistical tools, e.g., Excel, SQL, Python.
Visualize data through charts and graphs to communicate findings, e.g., Tableau, Power BI.
Generate reports and dashboards for stakeholders to track key metrics.
Provide actionabl...
I faced challenges in data cleaning and analysis, which I overcame through systematic approaches and collaboration.
Identified missing data in a healthcare dataset and used interpolation to fill gaps, ensuring data integrity.
Faced discrepancies in data from multiple sources; resolved by standardizing formats and conducting thorough validation.
Collaborated with cross-functional teams to understand data requirements,...
My past experience aligns well with the data analyst role, showcasing relevant skills and knowledge in data analysis and interpretation.
Worked as a data analyst intern, where I utilized SQL to extract and analyze data from databases.
Developed dashboards using Tableau to visualize key performance indicators for a marketing team.
Conducted statistical analysis using Python to identify trends and patterns in customer ...
What people are saying about Amazon
SQL is a programming language used for managing and manipulating relational databases.
SQL stands for Structured Query Language
It is used to communicate with databases to perform tasks such as querying data, updating data, and creating tables
Types of SQL commands include SELECT, INSERT, UPDATE, DELETE, CREATE, and DROP
Example: SELECT * FROM table_name WHERE condition;
The question is about SQL query writing in 30 minutes.
Understand the requirements and constraints of the query
Identify the tables and columns needed
Write the SQL query using appropriate syntax and functions
Test the query with sample data to ensure accuracy
Key subjects for data analysts include statistics, programming, data visualization, and domain knowledge.
Statistics: Understanding distributions, hypothesis testing, and regression analysis are crucial for data interpretation.
Programming: Proficiency in languages like Python or R helps in data manipulation and analysis.
Data Visualization: Tools like Tableau or Matplotlib are essential for presenting data insights ...
I applied via AmbitionBox and was interviewed in Nov 2024. There were 3 interview rounds.
NLP is my favorite subject. Is relatated medical and sign language. I have done reseach with mechien learning and AI TOOLS used for problem solving approach.
A group discussion was conducted on data-based management regarding Mr. Adani's food industry products in the state of Gujarat and their exports to other countries, utilizing data analytics.
I appeared for an interview in Jun 2025, where I was asked the following questions.
I embody Amazon's mission by prioritizing customer satisfaction and innovation in my data analysis work.
I actively seek to understand customer needs by analyzing feedback and data trends, ensuring our solutions align with their expectations.
I embrace Amazon's leadership principles, such as 'Invent and Simplify,' by proposing innovative data solutions that streamline processes.
I stay updated on industry trends and best ...
Identify the first duplicate integer in an array efficiently using a set.
Use a set to track seen integers as you iterate through the array.
For each integer, check if it is already in the set.
If it is, return that integer as the first duplicate.
If not, add it to the set and continue.
Example: For array [2, 3, 1, 2, 4], the first duplicate is 2.
I appeared for an interview in May 2025, where I was asked the following questions.
I admire this company's commitment to innovation and data-driven decision-making, which aligns perfectly with my career goals.
The company's focus on leveraging data analytics to improve patient outcomes resonates with my passion for impactful work.
I am impressed by the collaborative culture here, which fosters continuous learning and professional growth.
The innovative projects, such as using AI for predictive analytics...
I faced challenges in data cleaning and analysis, which I overcame through systematic approaches and collaboration.
Identified missing data in a healthcare dataset and used interpolation to fill gaps, ensuring data integrity.
Faced discrepancies in data from multiple sources; resolved by standardizing formats and conducting thorough validation.
Collaborated with cross-functional teams to understand data requirements, whic...
I applied via Naukri.com and was interviewed in Nov 2024. There were 2 interview rounds.
Reasoning
Coding
Spit out
General discussion
Algorithm coding
Array sorting
Machine learning
SQL
Python
C#
I appeared for an interview in May 2025, where I was asked the following questions.
Key subjects for data analysts include statistics, programming, data visualization, and domain knowledge.
Statistics: Understanding distributions, hypothesis testing, and regression analysis are crucial for data interpretation.
Programming: Proficiency in languages like Python or R helps in data manipulation and analysis.
Data Visualization: Tools like Tableau or Matplotlib are essential for presenting data insights effec...
I applied via AmbitionBox and was interviewed in Sep 2024. There was 1 interview round.
I appeared for an interview in Apr 2025, where I was asked the following questions.
I appeared for an interview in Feb 2025, where I was asked the following questions.
My past experience aligns well with the data analyst role, showcasing relevant skills and knowledge in data analysis and interpretation.
Worked as a data analyst intern, where I utilized SQL to extract and analyze data from databases.
Developed dashboards using Tableau to visualize key performance indicators for a marketing team.
Conducted statistical analysis using Python to identify trends and patterns in customer behav...
I appeared for an interview in Apr 2025, where I was asked the following questions.
Your monthly salary depends on various factors like job role, experience, and location.
Salary varies by industry; for example, data analysts in tech may earn more than those in non-profits.
Experience level matters; entry-level analysts might earn $50,000 annually, while senior analysts can earn $100,000 or more.
Location impacts salary; analysts in cities like San Francisco or New York typically earn higher salaries due...
I applied via Naukri.com and was interviewed in Nov 2024. There were 2 interview rounds.
About my relationship with team members and team leader
The duration of Amazon Data Analyst interview process can vary, but typically it takes about less than 2 weeks to complete.
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