HDB Financial Services Data Analyst Interview Questions and Answers

Asked questions of finance and aptitude

Q1. What is machine learning?
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Machine learning is a branch of artificial intelligence that involves developing algorithms and models that enable computers to learn from and make predictions or decisions based on data.
• Machine learning is a subset of artificial intelligence that focuses on developing algorithms that can learn from and make predictions or decisions based on data.

• It involves training models on large datasets to recognize patterns and m...read more
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Q2. What do you know about SQL?
Ans. 
SQL is a programming language used for managing and manipulating relational databases.
• SQL stands for Structured Query Language

• It is used to retrieve and manipulate data in relational databases

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE

• SQL can be used to create tables, indexes, and views

• Examples of SQL databases include MySQL, PostgreSQL, Oracle
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Q3. What you know about software Development?
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Software development involves creating, designing, testing, and maintaining software applications.
• Software development includes coding, testing, debugging, and documenting software applications.

• Developers use programming languages like Java, Python, C++, etc. to write code.

• Agile and Waterfall are common software development methodologies.

• Version control systems like Git are used to manage code changes.

• Software developm...read more
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Q1. What are the algorithms you know in machine learning and their details ?
Ans. 
Various machine learning algorithms with brief details
• Supervised Learning: Linear Regression, Logistic Regression, Support Vector Machines (SVM), Decision Trees, Random Forest

• Unsupervised Learning: K-means Clustering, Hierarchical Clustering, Principal Component Analysis (PCA)

• Reinforcement Learning: Q-Learning, Deep Q-Networks (DQN)

• Neural Networks: Convolutional Neural Networks (CNN), Recurrent Neural Networks (RNN), L
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Q2. Python questions
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Sort an array in place.

Q1. What is dbms explain in its importance
Ans. 
DBMS stands for Database Management System. It is a software that manages databases and allows users to interact with them.
• DBMS helps in organizing and storing data efficiently.

• It provides data security by controlling access to the database.

• DBMS allows for data consistency and integrity through features like transactions and constraints.

• It enables data sharing and collaboration among multiple users.

• Examples of popular ...read more
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Q2. What is computer networking
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Computer networking is the practice of connecting computers and other devices to share resources and information.
• Computer networking involves the use of hardware (such as routers, switches, and cables) and software (such as protocols and operating systems).

• It allows devices to communicate with each other, share data, and access resources like printers and internet connections.

• Examples of computer networking technologie...read more
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Q3. Whant is tcp explainin breif?
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TCP (Transmission Control Protocol) is a communication protocol that ensures reliable and ordered delivery of data packets over a network.
• TCP is a connection-oriented protocol

• It provides error-checking and data integrity

• TCP uses a three-way handshake for connection establishment

• Examples of applications that use TCP include web browsing, email, and file transfer
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Q4. What is probablit?
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Probability is a measure of the likelihood that an event will occur.
• Probability ranges from 0 (impossible) to 1 (certain)

• It is often calculated by dividing the number of favorable outcomes by the total number of possible outcomes

• Example: The probability of rolling a 6 on a fair six-sided die is 1/6 or approximately 0.167
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Q5. What is the use of tcp
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TCP (Transmission Control Protocol) is a communication protocol that ensures reliable and ordered delivery of data packets over a network.
• TCP is one of the main protocols in the Internet protocol suite.

• It provides error-checking, sequencing, and flow control to ensure data integrity and reliability.

• TCP establishes a connection-oriented communication between two devices before data transfer.

• Examples of applications usin...read more
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Asked about a case study on whom to give a loan among 1000 customers

Q1. What are different types of joins in sql.
Ans. 
Different types of joins in SQL include inner join, left join, right join, and full outer join.
• Inner join: Returns rows when there is a match in both tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

• Full outer join: Returns rows when there is a match in either table.
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Q2. How to use Vlookup in excel.
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Vlookup is a function in Excel used to search for a value in a table and return a corresponding value from another column.
• Enter the formula =VLOOKUP(lookup_value, table_array, col_index_num, [range_lookup]) in a cell

• lookup_value is the value to search for in the first column of the table_array

• table_array is the range of cells that contains the data

• col_index_num is the column number in the table_array from which to retr...read more
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Q3. Write a python code to retrieve common rows from two tables
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Python code to retrieve common rows from two tables
• Use pandas library to read tables and perform operations

• Merge the two tables using a common column

• Filter the merged table to get common rows
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Q4. Explain one of your capstone projects.
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Q5. How do we manage large data.
Ans. 
Large data can be managed through data storage solutions, data processing techniques, and data visualization tools.
• Utilize data storage solutions such as databases, data lakes, and cloud storage to store large volumes of data.

• Implement data processing techniques like data cleaning, transformation, and aggregation to analyze and extract insights from large datasets.

• Use data visualization tools like Tableau, Power BI, or...read more
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Q6. What do you know about our comapny.
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Q1. Questions regarding EDA
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Q2. Questions regarding SQL
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Q3. Questions regarding Power Bi
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Q1. About case studies regarding financial data
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1 hour coding test on intermediate python programming