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MathCo Interview Questions and Answers
33 Interview questions
RGM initiatives in supply chain face challenges like data integration, demand forecasting, and stakeholder alignment.
Data Integration: Difficulty in consolidating data from various sources, leading to inconsistent insights. For example, merging sales data from different regions.
Demand Forecasting: Inaccurate predictions can lead to overstock or stockouts. For instance, seasonal demand spikes not being anticipated.
...
This code converts Roman numerals to Indo-Arabic numbers using a mapping of values and a loop to calculate the total.
Mapping Values: Create a dictionary to map Roman numerals to their corresponding values, e.g., {'I': 1, 'V': 5, 'X': 10, 'L': 50, 'C': 100, 'D': 500, 'M': 1000}.
Iterate Through Characters: Loop through each character in the Roman numeral string from left to right.
Check for Subtraction: If the curren...
My design process involves research, ideation, prototyping, testing, and iteration to create user-centered solutions.
1. Research: Conduct user interviews and surveys to understand needs. For example, I once interviewed patients to improve a health app.
2. Ideation: Brainstorm ideas and create user personas to guide design decisions. I use techniques like mind mapping.
3. Prototyping: Develop low-fidelity wireframes ...
XPath is a query language used to select nodes from an XML document, essential for web automation and testing.
XPath uses path expressions to navigate through elements and attributes in XML.
Example: //div selects all <div> elements in the document.
You can use predicates to filter results, e.g., //input[@type='text'] selects all text input fields.
XPath supports various axes like child, parent, ancestor, etc. E...
Java programs are versatile applications that can run on any device with a Java Virtual Machine (JVM).
Java is an object-oriented programming language, which means it uses objects to represent data and methods.
Java programs are compiled into bytecode, which can be executed on any platform with a JVM, ensuring portability.
Java supports multithreading, allowing concurrent execution of two or more threads for efficien...
Yes, useEffect() hook can run twice under certain conditions.
useEffect() hook can run twice if the dependencies array changes between renders.
This can happen if the dependencies array contains values that change frequently.
For example, if a state variable is included in the dependencies array and it is updated in the component, useEffect() will run again.
React Queries are a library for managing server state in React applications.
React Queries provide a way to fetch and cache data from an API in React components.
They offer features like caching, background fetching, and automatic refetching.
React Queries can handle complex data fetching requirements, such as pagination and infinite scrolling.
System design for Uber involves creating a scalable and reliable platform for matching riders with drivers.
Use microservices architecture for scalability and fault tolerance
Implement geolocation services for real-time tracking of drivers and riders
Utilize a distributed database for storing user and trip data
Design a robust payment system for seamless transactions
Implement surge pricing algorithms to manage demand ...
Finding the missing element in an array of strings
Iterate through the array and check for any missing elements
Use a hash set to keep track of elements that have been seen
Compare the elements in the array to a reference list of all possible elements
Example: ['apple', 'banana', 'orange', 'grape'] - missing 'kiwi'
Example: ['red', 'blue', 'green', 'yellow'] - missing 'purple'
The task involves listening to audio clips and accurately repeating the sentences spoken in them.
Active listening is crucial; focus on the tone and pronunciation.
Practice repeating sentences to improve memory retention.
Use phonetic spelling if necessary to capture difficult words.
Break down longer sentences into smaller parts for easier repetition.
MathCo Interview Experiences
116 interviews found
Anonymous
I applied via LinkedIn and was interviewed in Nov 2022. There were 3 interview rounds.
(2 Questions)
- Q1. Describe the Project Architecture End-to-End
- Ans.
The project architecture end-to-end includes the overall design and structure of the project from start to finish.
The architecture should include the hardware and software components, as well as the communication protocols and data flow.
It should also consider the scalability, security, and performance of the system.
Examples of project architecture include client-server, microservices, and event-driven architectures.
Th...
- Q2. Explain how will you implement SCD Type 2.
(2 Questions)
- Q1. Display only those elements which do not occur more than once.
- Ans.
Display non-repeated elements
Iterate through the elements and count their occurrences
Display only those elements with occurrence count of 1
Use a hash table or dictionary to store the counts
Time complexity: O(n)
- Q2. Difference between a list and a tuple. Explain a use case where you will use a tuple.
- Ans.
List vs Tuple and use case for Tuple
List is mutable while Tuple is immutable
List uses square brackets while Tuple uses parentheses
Tuple is used when data needs to be protected from modification
Tuple is also used for returning multiple values from a function
Interview Preparation Tips
- Work on SQL Problems
Skills evaluated in this interview
ABHISHEK JHA
Selected
I applied via Company Website and was interviewed in Oct 2024. There were 3 interview rounds.
(8 Questions)
- Q1. End to end architecture of current project
- Q2. Basic spark code to read & write files
- Q3. How to upsert data in table in spark
- Q4. How do you handle sudden increase in data volume
- Q5. Discussion on delta tables & ACID transactions
- Q6. Explain autoloader and use case in Databricks
- Q7. SQL question using window functions Lead, row number
- Q8. Python question using hashmap & String
(4 Questions)
- Q1. Current project understanding end to end
- Q2. Data pipeline design for a ride sharing company, ask bunch of follow up questions on the conclude a particular design.
- Q3. Explain how you follow SDLC(Agile, waterfall) ?
- Q4. Why are you looking for a change now
(4 Questions)
- Q1. Basic introductions
- Q2. What kind of work are you looking for? what do you know about the company
- Q3. Willing to relocate?
- Q4. Personal hobbies and aspirations
Interview Preparation Tips
- Spark
- Python
- SQL
- System Design
- Data Architecture
- Streaming
I applied via Campus Placement
Aptitude mostly involves basic Apti Questions(Alegbra, PnC, Probability, Percentage) and Logical and Cognitive Question.
apart from this there will be 2 coding questions if i can recall well( it will easy-medium or medium )
(5 Questions)
- Q1. Basic Interests that you have
- Ans.
I have a keen interest in data analysis, problem-solving, and continuous learning, particularly in finance and technology sectors.
Data Analysis: I enjoy working with data sets to uncover trends and insights, such as analyzing sales data to improve marketing strategies.
Problem-Solving: I love tackling complex problems, like optimizing processes in a project to enhance efficiency and reduce costs.
Continuous Learning: I a...
- Q2. About the project you worked on
- Q3. Problem solving questions
- Q4. Coding questions( Prime, factorial, fibonacci)
- Q5. Suppose there are 3 students, everyone has x y and z salaries but no one is aware of each others salary. Find the avg of there salaries
- Ans.
To find the average of the salaries of 3 students with unknown salaries, add x, y, and z and divide by 3.
Add the salaries of x, y, and z together
Divide the total sum by 3 to find the average salary
Madhu Sudhan
I applied via Company Website and was interviewed in Nov 2024. There were 2 interview rounds.
(3 Questions)
- Q1. Tell me your Design Process
- Ans.
My design process involves research, ideation, prototyping, testing, and iteration to create user-centered solutions.
1. Research: Conduct user interviews and surveys to understand needs. For example, I once interviewed patients to improve a health app.
2. Ideation: Brainstorm ideas and create user personas to guide design decisions. I use techniques like mind mapping.
3. Prototyping: Develop low-fidelity wireframes and h...
- Q2. Tell most challenging project you worked on
- Q3. Tell about your background
- Ans.
I have a diverse background in design, technology, and user research, which fuels my passion for creating intuitive user experiences.
Bachelor's degree in Graphic Design, where I learned the fundamentals of visual communication.
Worked as a UI/UX intern at XYZ Company, where I redesigned their mobile app, increasing user engagement by 30%.
Completed a certification in User Experience Design, focusing on user research and ...
(2 Questions)
- Q1. Portfolio Review
- Q2. More about design process
Skills evaluated in this interview
I applied via Campus Placement and was interviewed in Sep 2024. There were 4 interview rounds.
It was 1 hour test, with logical,numerical,english
(2 Questions)
- Q1. Few audios will be played , and u need to repeat the sentences
- Ans.
The task involves listening to audio clips and accurately repeating the sentences spoken in them.
Active listening is crucial; focus on the tone and pronunciation.
Practice repeating sentences to improve memory retention.
Use phonetic spelling if necessary to capture difficult words.
Break down longer sentences into smaller parts for easier repetition.
- Q2. English grammer questions , and correcting the wrong statements
(2 Questions)
- Q1. Finding the missing element in the array
- Ans.
Finding the missing element in an array of strings
Iterate through the array and check for any missing elements
Use a hash set to keep track of elements that have been seen
Compare the elements in the array to a reference list of all possible elements
Example: ['apple', 'banana', 'orange', 'grape'] - missing 'kiwi'
Example: ['red', 'blue', 'green', 'yellow'] - missing 'purple'
- Q2. About the projects mentioned in resume
(2 Questions)
- Q1. It was hr round, and few puzzles were asked
- Q2. And what do i actually expect from this job
Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed in Oct 2024. There were 2 interview rounds.
Basic python problems (leetcode easy)
(3 Questions)
- Q1. System design for uber
- Ans.
System design for Uber involves creating a scalable and reliable platform for matching riders with drivers.
Use microservices architecture for scalability and fault tolerance
Implement geolocation services for real-time tracking of drivers and riders
Utilize a distributed database for storing user and trip data
Design a robust payment system for seamless transactions
Implement surge pricing algorithms to manage demand durin...
- Q2. Database you choose for transactions
- Ans.
I would choose a relational database like MySQL or PostgreSQL for transactions due to their ACID compliance and strong support for transactions.
Relational databases like MySQL or PostgreSQL are commonly used for transactions due to their ACID compliance.
These databases provide strong support for transactions, ensuring data integrity and consistency.
Other options like NoSQL databases can also be considered depending on ...
- Q3. Deep architecture
Interview Preparation Tips
Skills evaluated in this interview
Basic aptitude with pseudocode and scenario-based questions
(2 Questions)
- Q1. Basic grammar, speech
- Q2. A place you would like to visit
- Ans.
I would love to visit the ancient city of Petra in Jordan.
Petra is a UNESCO World Heritage Site known for its rock-cut architecture and water conduit system.
The Treasury and the Monastery are iconic structures in Petra.
Exploring the narrow Siq canyon leading to the Treasury is a must-do experience.
Learning about the history and culture of the Nabatean civilization that once inhabited Petra.
Taking a camel ride through t...
(2 Questions)
- Q1. Project based, how would u scale it further
- Q2. Sort an array of integers, find the max of two numbers using sql
- Ans.
Sorting and finding max of two numbers in an array using SQL
Use ORDER BY to sort the array of integers
Use LIMIT 2 to get the top two numbers
Use MAX function to find the maximum of the two numbers
(2 Questions)
- Q1. Introduction, scenario-based
- Q2. What do u know about the company, what's ur goal 3 years down the line
- Ans.
I know that the company is a leading financial services firm with a strong reputation. My goal in 3 years is to become a Senior Analyst and contribute significantly to the company's success.
The company is a well-established financial services firm known for its expertise in analytics and market research.
They have a strong reputation for providing innovative solutions to clients and maintaining high standards of profess...
Interview Preparation Tips
Skills evaluated in this interview
I applied via Campus Placement and was interviewed in Jul 2024. There were 3 interview rounds.
Aptitude, verbal ,Pseudo-code, reasoning
(1 Question)
- Q1. 1) How are you updated about current changes in technology 2)Is it possible to have different datatypes in an array 3)Difference btw list and tuple 4)Challenges faced while doing the project. 5)Why wa...
- Ans.
Answering questions related to technology, project management, and programming concepts in an interview for Trainee Analyst position.
Stay updated on technology changes through online resources, tech blogs, forums, and attending workshops/seminars.
Yes, it is possible to have different data types in an array in programming languages like Python.
List is mutable (can be changed) while tuple is immutable (cannot be changed)...
(1 Question)
- Q1. 1)SQL/Python based puzzle output 2)Which position do you see in 10 years 3)What in your technical skills is ur favourite subject. 4)Did u do any applied Python projects 5)Type of questions you are expert i...
I applied via Campus Placement and was interviewed in Aug 2024. There were 4 interview rounds.
It was having basic aptitude questions
(2 Questions)
- Q1. They asked basic english question
- Q2. And alos topic was provided so we had to speak on it.
(2 Questions)
- Q1. SQL syntax and difference between having and where clause
- Ans.
HAVING clause is used with GROUP BY to filter grouped rows, WHERE clause is used to filter individual rows.
HAVING clause is used with GROUP BY to filter grouped rows based on aggregate functions
WHERE clause is used to filter individual rows based on conditions
HAVING clause is applied after GROUP BY, WHERE clause is applied before GROUP BY
HAVING clause can only be used with SELECT statement that contains a GROUP BY clau...
- Q2. Difference between array and linkedlist,stack and queue
- Ans.
Arrays store elements in contiguous memory, while linked lists use nodes with pointers. Stacks follow LIFO, queues follow FIFO.
Arrays store elements in contiguous memory locations, allowing for constant time access to elements using indices.
Linked lists use nodes with pointers to the next node, allowing for dynamic memory allocation and insertion/deletion at any position.
Stacks follow Last In First Out (LIFO) principle...
(2 Questions)
- Q1. Tell me about your self
- Ans.
I am a data science enthusiast with a strong background in statistics and machine learning.
Completed coursework in data analysis, statistical modeling, and predictive analytics
Proficient in programming languages such as Python, R, and SQL
Experience with data visualization tools like Tableau and Power BI
Worked on projects involving regression analysis, clustering, and classification algorithms
- Q2. Why you want to join this role
- Ans.
I am passionate about using data to solve complex problems and make informed decisions.
I have a strong background in statistics, mathematics, and programming, which are essential skills for a data science role.
I am excited about the opportunity to work with real-world data and apply machine learning algorithms to extract valuable insights.
I am eager to learn from experienced data scientists and contribute to innovative...
Skills evaluated in this interview
(2 Questions)
- Q1. What are React Queries?
- Ans.
React Queries are a library for managing server state in React applications.
React Queries provide a way to fetch and cache data from an API in React components.
They offer features like caching, background fetching, and automatic refetching.
React Queries can handle complex data fetching requirements, such as pagination and infinite scrolling.
- Q2. Can useEffect() hook run twice?
- Ans.
Yes, useEffect() hook can run twice under certain conditions.
useEffect() hook can run twice if the dependencies array changes between renders.
This can happen if the dependencies array contains values that change frequently.
For example, if a state variable is included in the dependencies array and it is updated in the component, useEffect() will run again.
Skills evaluated in this interview
Kirti
I applied via Campus Placement
(3 Questions)
- Q1. What is array what is a linkedlist
- Ans.
An array is a data structure that stores a collection of elements of the same type in contiguous memory locations. A linked list is a data structure that consists of nodes where each node contains a data field and a reference to the next node in the sequence.
Array is static in size and elements are accessed using indices.
Linked list is dynamic in size and elements are accessed sequentially by following the references.
E...
- Q2. What is search engine optimization
- Q3. What is javas main method refers too
- Ans.
The main method in Java refers to the entry point of a Java program where the execution begins.
The main method must be declared as public static void main(String[] args)
It is the starting point of a Java program where the JVM looks for the main method to start execution
The main method takes an array of strings as input which can be used to pass command line arguments
(2 Questions)
- Q1. Where do you want to see you in next five years
- Ans.
In the next five years, I see myself advancing in my career as an Analyst, taking on more responsibilities and contributing to the growth of the company.
Continuing to develop my analytical skills through ongoing training and learning opportunities
Taking on leadership roles within the team or department
Contributing to strategic decision-making processes
Building strong relationships with clients and stakeholders
Possibly ...
- Q2. Introduce yourself
Skills evaluated in this interview
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