United Overseas Bank Data Engineer Interview Questions and Answers

2 coding questions based on DSA.

Q1. Easy coding problem.
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Q2. Medium coding problem.
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Q1. Explain your previous project?
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Using loop print the star for a triangle.
What is pandas.
Different between tuple and list.

Q1. What is 5G. Types of G.
Ans. 
5G is the fifth generation of wireless technology, offering faster speeds, lower latency, and increased capacity for mobile networks.
• 5G stands for fifth generation and is the latest standard for wireless communication

• It offers faster download and upload speeds, lower latency, and increased capacity compared to previous generations like 4G

• 5G technology uses higher frequency bands to transmit data, allowing for more devi...read more
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Q2. About your self. What is machine learning. Machine learning types.
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Q3. What is tensor . Linear regression
Ans. 
A tensor is a mathematical object representing multi-dimensional arrays of data.
• Tensors are commonly used in machine learning and deep learning for representing data.

• They can have any number of dimensions, such as scalars (0D), vectors (1D), matrices (2D), or higher dimensional arrays.

• In TensorFlow, a popular deep learning framework, tensors are the main data structure used for computations.

• Operations on tensors includ...read more
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Q4. Measure of central tendency
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Measure of central tendency refers to the average or middle value in a dataset.
• Central tendency is used to summarize the data and give a single value that represents the entire dataset.

• Common measures of central tendency include mean, median, and mode.

• Mean is the average of all values, median is the middle value when the data is sorted, and mode is the most frequently occurring value.

• For example, in a dataset of 5, 7, ...read more
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Hackerrank questions which are not hard to complete, both are to implement functions of a class. LC medium level. After completing both questions still reject

Q1. Not applicable at this point
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Round duration - 45 Minutes
Round difficulty - Easy

The interviewer was friendly. Explained the question well. Allowed to use any preferred platform to write code.

Q1. Best Time to Buy and Sell Stock
You are given an array/list 'prices' where the elements of the array represent the prices of the stock as they were yesterday and indices of the array represent minu...read more
Ans. Brute Force
We will check all the possible ways of buying and selling stocks. We will fix the time we are buying the stock and check all the possible minutes we can sell this stock and update the maximum profit we can get. Now we will take the maximum profit for all the possible buying time and that would be our final maximum profit.
 
Algorithm: 
 
1. Initialize an integer variable ‘maxProfit’ to store the maxi...read more
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Round duration - 60 Minutes
Round difficulty - Medium

Q1. Dance Together
Ninja has recently joined a dance studio as a coach. In the studio, there are N boys and M girls. He can make K potential pairs out of them. He needs to find the maximum number of pairs he c...read more
Ans. Greedy Approach
If we observe the given problem, we can model it in a graph, specifically a bipartite graph - G (X, Y), where ‘X’ is a vertex set of boys and ‘Y’ is vertex set of girls, and there an edge between a girl and boy if they can dance together. Now we just need to find a set with a maximum number of edges such that no two edges in the set have a common vertex. Here, we will use the concept of Maximum Bipartite...read more
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Q2. OS Question
Multiprocessing vs multithreading
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Round duration - 60 Minutes
Round difficulty - Hard

Q1. System Design Question
Describe classes and functions for the design of Splitwise.
Ans. 
Tip 1 : Read different designs for different products.
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Round duration - 60 Minutes
Round difficulty - Hard

Asked about the SQL and python.

Q1. Told about the Offered role responsibilities.
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Q2. Ask about the previous work experience.
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3 coding questions

Q1. Design a Time Series Database
Ans. 
A time series database stores data points with timestamps for efficient retrieval and analysis.
• Choose a suitable data model for the database

• Use a time-based partitioning scheme for efficient data retrieval

• Implement compression techniques to reduce storage requirements

• Support for querying and analyzing time-based data

• Ensure data consistency and durability

• Consider scalability and high availability

• Examples: InfluxDB, Time
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Q1. What about you Self introduction
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Q2. Why should I hire you
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Q3. Why do you want to work at our company
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Q4. Can you work under pressure
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Q5. What are your ambition or goals
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Q6. How much in salary salary expectance
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Q7. Your Family background
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Q8. What are your strength and weakness
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Q9. What is the difference between confidence and over confidence
Ans. 
Confidence is a belief in oneself based on experience and ability, while overconfidence is an excessive belief in oneself without adequate evidence.
• Confidence is a positive trait that helps individuals to achieve their goals and overcome challenges.

• Overconfidence, on the other hand, can lead to poor decision-making, underestimating risks, and failure to learn from mistakes.

• Confidence is based on a realistic assessment ...read more
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Q10. What is the difference between hard work and smart work
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