Talentica Software Associate Data Engineer Interview Questions and Answers

Fizz buzz question and array related

Q1. Basic react, javascript and one question to find duplicate.
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Q1. Salary discussion
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Q1. Copied question from chat gpt
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Q2. What is software cycle
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Q1. How to optimize slow running query in mysql
Ans. 
Optimize slow MySQL queries by analyzing execution plans, indexing, and rewriting queries for efficiency.
• Use EXPLAIN to analyze query execution plans: EXPLAIN SELECT * FROM users WHERE age > 30;

• Create appropriate indexes: CREATE INDEX idx_age ON users(age);

• Avoid SELECT *; specify only needed columns: SELECT name, email FROM users;

• Use JOINs instead of subqueries when possible: SELECT u.name FROM users u JOIN orders o...read more
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Q2. What is concept of closure in javascript
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A closure in JavaScript is a function that retains access to its lexical scope, even when executed outside that scope.
• Closures allow a function to access variables from an outer function's scope even after the outer function has finished executing.

• Example: function outer() { let count = 0; return function inner() { count++; return count; }; } const increment = outer(); increment(); // returns 1

• Closures are often used f...read more
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General topics like mathe, English, social etc

It represents the eligibility of person and thinking process ,view of thoughts

Q1. We cannot judge people to atonce chance
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Skills ,fast typing , experienced ,new ideas

Q1. All the knowledge of technical work and word
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Deeply study case and make a point to make attractive

Q1. React lifecycle methods, React hooks
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Q1. RDBMS related questions asked
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Q2. SQL login building related questions
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Leet code medium level question

Q1. About Java Streams
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Q2. Restful API coding completion based on given file
Ans. 
Guide to completing a RESTful API coding task with essential pointers and examples.
• Understand REST principles: Use HTTP methods (GET, POST, PUT, DELETE) appropriately.

• Define clear endpoints: Example - /api/users for user-related operations.

• Implement status codes: Use 200 for success, 404 for not found, 500 for server errors.

• Use JSON for data interchange: Ensure requests and responses are in JSON format.

• Consider authent...read more
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Q1. To check your attitude
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Q2. Given detailed about company and what project you are going to work on?
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Q1. Hashmap working
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A hashmap is a data structure that stores key-value pairs for efficient data retrieval using a hash function.
• Uses a hash function to compute an index for storing values.

• Handles collisions using methods like chaining or open addressing.

• Example: Inserting a key-value pair (key: 'apple', value: 1) involves hashing 'apple' to find an index.

• Retrieving a value involves hashing the key again to find the corresponding index.
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Q2. Multithreading cases
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Q3. Scenario specific on how to handle multiple events on a single variable to have accurate result
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Managing multiple events on a single variable requires careful synchronization to ensure accurate results.
• Use locks or mutexes to prevent race conditions when accessing the variable.

• Implement event debouncing to limit the frequency of updates, ensuring only the final event is processed.

• Utilize a queue to handle events sequentially, processing them one at a time to maintain accuracy.

• Consider using atomic operations for ...read more
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Q4. Database indexing
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Q5. Architecture level
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