Data Analytics Intern

20+ Data Analytics Intern Interview Questions and Answers

Updated 7 Jul 2025
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Asked in TCS

5d ago

Q. What are the different data types in Python?

Ans.

Different data types in Python include integers, floats, strings, lists, tuples, dictionaries, and booleans.

  • Integers: whole numbers without decimals (e.g. 5, -10)

  • Floats: numbers with decimals (e.g. 3.14, -0.5)

  • Strings: sequences of characters enclosed in quotes (e.g. 'hello', '123')

  • Lists: ordered collections of items (e.g. [1, 'apple', True])

  • Tuples: ordered, immutable collections of items (e.g. (1, 'banana', False))

  • Dictionaries: unordered key-value pairs (e.g. {'key': 'value',...read more

Asked in VCodez

6d ago

Q. What is the worst-case time complexity of the merge sort algorithm?

Ans.

Merge sort has a worst-case time complexity of O(n log n), making it efficient for large datasets.

  • Merge sort divides the array into halves recursively until each subarray has one element.

  • It then merges the subarrays back together in sorted order.

  • The division of the array takes log n time, and merging takes linear time, resulting in O(n log n).

  • Example: Sorting an array of 8 elements involves 3 levels of division (log2(8) = 3) and linear merging at each level.

Data Analytics Intern Interview Questions and Answers for Freshers

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1d ago

Q. What is Python and what are its key features?

Ans.

Python is a high-level programming language known for its simplicity and readability.

  • Python is an interpreted language, meaning it does not need to be compiled before execution.

  • It supports multiple programming paradigms, including object-oriented, imperative, and functional programming.

  • Python has a large standard library with built-in modules for various tasks, making it versatile and efficient.

  • It is widely used in data analytics, machine learning, web development, and scient...read more

Q. Given a linked list, swap every two adjacent nodes and return its head. You must solve the problem without modifying the values in the list's nodes (i.e., only nodes themselves may be changed).

Ans.

To swap 2 adjacent elements of a linked list, update the pointers accordingly.

  • Create a temporary pointer to store the address of the next node of the first element

  • Update the next pointer of the first element to point to the node after the next node

  • Update the next pointer of the temporary pointer to point to the first element

  • Update the next pointer of the node before the first element to point to the temporary pointer

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Asked in TO THE NEW

3d ago

Q. Given two tables, Employee and Products, how would you find which product has the most sales by which employee?

Ans.

Analyze sales data to identify which employee sold the most of each product.

  • Join the Employee and Products tables on a common key, such as Employee ID.

  • Aggregate sales data by employee and product to calculate total sales.

  • Use SQL queries like 'SELECT EmployeeID, ProductID, SUM(Sales) FROM SalesTable GROUP BY EmployeeID, ProductID' to get results.

  • Identify the maximum sales for each product using 'MAX' function in SQL.

Asked in S&P Global

3d ago

Q. 1Q) what is balance sheet? 2Q) what is Net Profit & Net Loss 3Q) what are the Golden Principles of Accounting?

Ans.

Balance sheet is a financial statement that shows a company's assets, liabilities, and shareholders' equity at a specific point in time.

  • Balance sheet provides a snapshot of a company's financial position.

  • It consists of three main components: assets, liabilities, and shareholders' equity.

  • Assets are what the company owns, liabilities are what it owes, and shareholders' equity is the difference between the two.

  • Net Profit is the amount by which revenues exceed expenses in a given...read more

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Asked in iNeuron.ai

6d ago

Q. What is PEP 8 and why is it important?

Ans.

PEP 8 is a style guide for Python code that outlines best practices for writing clean and readable code.

  • PEP 8 stands for Python Enhancement Proposal 8.

  • It covers topics such as indentation, line length, imports, naming conventions, and more.

  • Following PEP 8 helps improve code consistency, readability, and maintainability.

  • For example, PEP 8 recommends using 4 spaces for indentation and limiting line length to 79 characters.

Asked in Genpact

2d ago

Q. What is a garbage collector in Java?

Ans.

Garbage collector in Java is a program that automatically manages memory by reclaiming unused memory.

  • Garbage collector is a part of Java Virtual Machine (JVM) responsible for automatic memory management.

  • It identifies and deletes objects that are no longer reachable or needed by the program.

  • Garbage collection helps prevent memory leaks and improves performance by freeing up memory for new objects.

  • Examples of garbage collectors in Java include Serial, Parallel, CMS, and G1.

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Asked in TCS

4d ago

Q. What is the difference between SQL and NoSQL databases?

Ans.

SQL databases are relational databases that use structured query language, while NoSQL databases are non-relational and do not use SQL.

  • SQL databases are table-based and have a predefined schema, while NoSQL databases are document-based, key-value pairs, graph databases, or wide-column stores.

  • SQL databases are good for complex queries and transactions, while NoSQL databases are better for hierarchical data storage.

  • Examples of SQL databases include MySQL, Oracle, and PostgreSQL...read more

2d ago

Q. Write a query to find the best and worst feedback from the database.

Ans.

Query to find top best and worst feedback from the database

  • Use SQL query to retrieve feedback data from the database

  • Sort the feedback based on ratings to find the best and worst

  • Limit the results to show only the top best and worst feedback

3d ago

Q. How do you think you can add value to the business?

Ans.

I can add value to business by analyzing data to identify trends, make informed decisions, and optimize processes.

  • Utilizing data analytics tools to identify trends and patterns

  • Providing insights for informed decision-making

  • Optimizing processes for efficiency and cost savings

  • Developing predictive models for forecasting

  • Improving data quality and accuracy

Asked in Labmentix

6d ago

Q. What are the types of Data Analytics?

Ans.

Data analytics can be categorized into four main types: descriptive, diagnostic, predictive, and prescriptive analytics.

  • Descriptive Analytics: Summarizes historical data to understand trends (e.g., sales reports).

  • Diagnostic Analytics: Investigates past performance to determine causes (e.g., analyzing why sales dropped).

  • Predictive Analytics: Uses statistical models to forecast future outcomes (e.g., predicting customer behavior).

  • Prescriptive Analytics: Recommends actions based...read more

Asked in VCodez

4d ago

Q. What are some shortest path algorithms?

Ans.

Shortest path algorithms find the most efficient route between nodes in a graph, minimizing distance or cost.

  • Dijkstra's Algorithm: Finds the shortest path from a source node to all other nodes in a weighted graph.

  • Bellman-Ford Algorithm: Handles graphs with negative weight edges and can detect negative cycles.

  • A* Search Algorithm: Uses heuristics to improve efficiency in finding the shortest path, often used in pathfinding for games.

  • Floyd-Warshall Algorithm: Computes shortest p...read more

Asked in IBM

2d ago

Q. What payment methods do you accept?

Ans.

There are multiple types of payment methods that can be received.

  • Cash

  • Credit card

  • Debit card

  • Online payment

  • Bank transfer

Asked in Genpact

5d ago

Q. What is graphical data?

Ans.

Graphical data refers to data that is represented visually through graphs, charts, or other visualizations.

  • Graphical data helps in easily interpreting trends, patterns, and relationships within the data.

  • Common types of graphical data include bar graphs, pie charts, line graphs, and scatter plots.

  • It is often used in data analytics to communicate insights and findings effectively to stakeholders.

  • Graphical data can be created using tools like Microsoft Excel, Tableau, or Python ...read more

Asked in Labmentix

1d ago

Q. Describe a data analytics project you worked on.

Ans.

I analyzed patient data to identify trends in treatment outcomes for a healthcare provider, improving patient care strategies.

  • Collected and cleaned data from electronic health records (EHR) of over 1,000 patients.

  • Utilized Python and SQL for data manipulation and analysis.

  • Created visualizations using Tableau to present findings to stakeholders.

  • Identified key trends, such as the effectiveness of specific treatments on recovery times.

  • Collaborated with healthcare professionals to...read more

Asked in Philips

1d ago

Q. What is a neural network?

Ans.

Neural network is a type of machine learning algorithm inspired by the human brain's neural network structure.

  • Neural network consists of layers of interconnected nodes (neurons) that process information.

  • It can be used for tasks like image recognition, natural language processing, and predictive analytics.

  • Common types of neural networks include feedforward, convolutional, and recurrent neural networks.

1d ago

Q. What is an interpreted language?

Ans.

Interpreted language is executed line by line at runtime, without the need for compilation.

  • Code is translated and executed on the fly

  • Errors are found during runtime

  • Examples: Python, JavaScript, Ruby

Asked in MagicBricks

4d ago

Q. What is your expected salary?

Ans.

I expect a salary that reflects my skills, the industry standard, and the value I can bring to the team.

  • Research industry standards: For example, internships in data analytics typically range from $15 to $30 per hour.

  • Consider location: Salaries may vary based on the cost of living in different cities.

  • Highlight skills: If I have specific skills like Python or SQL, I might expect a higher salary.

  • Discuss learning opportunities: I'm also interested in the experience and mentorshi...read more

5d ago

Q. Define Data Science and Data Analytics.

Ans.

Data Science is the field of study that uses scientific methods, algorithms, and systems to extract knowledge and insights from data.

  • Data Science involves collecting, analyzing, and interpreting large amounts of data to make informed decisions.

  • It combines statistics, machine learning, and computer science to uncover patterns and trends in data.

  • Data Analytics focuses on analyzing data to draw conclusions and make recommendations based on the findings.

  • It involves using tools li...read more

5d ago

Q. define perceptron?(Ann,Cnn and Rnn)

Ans.

Perceptron is a type of artificial neuron used in machine learning for binary classification.

  • Perceptron is the simplest form of neural network.

  • It takes input values, applies weights, sums them up, and passes the result through an activation function.

  • It is used for binary classification tasks, where it predicts whether an input belongs to one class or another.

  • Examples include single-layer perceptrons and multi-layer perceptrons.

5d ago

Q. define Regression and classification?

Ans.

Regression predicts continuous outcomes, while classification predicts categorical outcomes.

  • Regression is used to predict continuous values based on input features.

  • Classification is used to predict categories or classes based on input features.

  • Examples of regression include predicting house prices based on features like size and location.

  • Examples of classification include predicting whether an email is spam or not based on its content.

Asked in TCS

3d ago

Q. What is inheritance?

Ans.

Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.

  • Allows for code reusability and promotes a hierarchical structure

  • Derived class inherits properties and behaviors from a base class

  • Can have multiple levels of inheritance

  • Example: Class 'Dog' can inherit from class 'Animal' and inherit attributes like 'name' and methods like 'eat()'

1d ago

Q. What courses are you pursuing?

Ans.

I am currently pursuing courses in Data Science, Statistics, and Programming.

  • Data Science

  • Statistics

  • Programming

Asked in MagicBricks

1d ago

Q. What is your time commitment?

Ans.

I am fully committed to the internship, ready to dedicate the necessary time and effort to excel in my role.

  • I can commit to 20-30 hours per week, aligning with the internship schedule.

  • I am flexible with my hours, able to work evenings or weekends if needed.

  • I prioritize this internship and will manage my academic workload accordingly.

  • For example, I can adjust my study schedule to ensure I meet all internship deadlines.

Asked in Amazon

1d ago

Q. What is data analytics?

Ans.

Data analytics is the process of examining data sets to draw conclusions and support decision-making.

  • Involves collecting, processing, and analyzing data to uncover patterns.

  • Used in various fields like business, healthcare, and sports for insights.

  • Example: Retailers analyze customer purchase data to optimize inventory.

  • Tech companies use data analytics to improve user experience and product features.

  • Healthcare providers analyze patient data to enhance treatment outcomes.

Asked in TCS

1d ago

Q. What is a primary key?

Ans.

A primary key is a unique identifier for a record in a database table, ensuring data integrity and enabling efficient data retrieval.

  • Uniqueness: Each value in a primary key column must be unique across the table.

  • Non-null: Primary key fields cannot contain NULL values.

  • Single or Composite: A primary key can be a single column or a combination of multiple columns (composite key).

  • Example: In a 'Users' table, 'UserID' can be a primary key, uniquely identifying each user.

  • Referentia...read more

Asked in MagicBricks

1d ago

Q. What is your name?

Ans.

My name is Alex Johnson, a passionate data analytics enthusiast eager to leverage data for impactful decision-making.

  • I have a background in statistics and programming, which helps me analyze data effectively.

  • I enjoy using tools like Python and SQL to extract insights from complex datasets.

  • In my previous project, I analyzed customer behavior data to improve marketing strategies.

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