Blackrock Interview Questions and Answers

Q1. Time based sections are there.
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Q1. Questions related to my projects and then questions on CS fundamentals and then a sql query
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Q1. General HR questions
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Three sections are there 1) Aptitude Test 2) SQL 3) DSA

Q1. What is DSA , sorting , difference between array and linked list
Ans. 
DSA stands for Data Structures and Algorithms. Sorting is the process of arranging data in a particular order. Array is a data structure that stores elements of the same data type in contiguous memory locations, while linked list is a data structure that stores elements in nodes with pointers to the next node.
• DSA stands for Data Structures and Algorithms

• Sorting is the process of arranging data in a particular order

• Arra...read more
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Q2. Written a SQL query
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A SQL query retrieves data from a database based on specified conditions.
• Use SELECT to specify columns: e.g., SELECT name, age FROM users;

• Use WHERE to filter results: e.g., WHERE age > 30;

• Join tables for related data: e.g., SELECT * FROM orders JOIN customers ON orders.customer_id = customers.id;

• Use GROUP BY for aggregation: e.g., SELECT COUNT(*) FROM users GROUP BY country;
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Q1. Coding question like add numbers
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Q2. Experience on your project
Ans. 
I have experience working on various data analysis projects, including market research, customer segmentation, and predictive modeling.
• Developed predictive models to forecast customer behavior and optimize marketing strategies

• Conducted market research to identify trends and opportunities for growth

• Performed customer segmentation analysis to target specific demographics with personalized marketing campaigns
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Aptitude test with different sections. Each section had its own time limit. Level - Moderate to difficult

Q1. Introduce yourself
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I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java and Python programming languages

• Proficient in web development technologies like HTML, CSS, and JavaScript

• Currently pursuing a degree in Computer Science
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Q2. Resume projects
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Q3. 2 DSA questions
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Q4. One SQL Query question
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Basic aptitude tese, logical reasoning and English

Q1. What are Mutual funds and their Types
Ans. 
Mutual funds are investment vehicles that pool money from multiple investors to invest in a diversified portfolio of securities.
• Mutual funds are managed by professional fund managers

• Types of mutual funds include equity funds, bond funds, money market funds, and balanced funds

• Equity funds invest in stocks, bond funds in bonds, money market funds in short-term debt securities, and balanced funds in a mix of stocks and bo...read more
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Q2. What are derivatives and types
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Derivatives are financial instruments whose value is derived from an underlying asset or group of assets.
• Types of derivatives include futures, options, swaps, and forwards.

• Derivatives can be used for hedging, speculation, or arbitrage.

• Examples of derivatives include stock options, commodity futures, and interest rate swaps.
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Q3. What are asset classes
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Asset classes are groups of securities that exhibit similar characteristics and behave similarly in the market.
• Asset classes include stocks, bonds, real estate, commodities, and cash equivalents.

• Investors can diversify their portfolios by investing in different asset classes.

• Each asset class has its own risk and return characteristics.

• Asset allocation involves determining the optimal mix of asset classes based on an in...read more
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Few basics of java
Dsa question

Q1. Java multithreading questions
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Q2. Spring boot questions.
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Q1. What are the tools you used
Ans. 
I have used a variety of tools including Excel, SQL, Tableau, Python, and Power BI.
• Excel

• SQL

• Tableau

• Python

• Power BI
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Q2. Power Apps used for reporting and automation
Ans. 
Power Apps can be used for creating custom reporting and automating business processes.
• Power Apps can connect to various data sources to pull in data for reporting purposes.

• Users can create custom dashboards and reports using Power Apps to visualize data.

• Automation can be achieved by creating workflows and processes within Power Apps.

• Examples: Creating a Power App to track sales leads and generate reports, automating a...read more
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