Volkswagen Group Technology Solution Software Developer Trainee Interview Questions and Answers

Q1. Oops, datastructure, sql queries, resume based projects were asked
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Q1. Code question was given and solution to be written on paper along with explanation
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Time, Speed, Logical questions

Q1. OOPs, SQL, HashMap
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Q2. Basic OOPs concepts with real time example
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Q3. Working of HashMap
Ans. 
HashMap is a data structure that stores key-value pairs and allows fast retrieval of values based on keys.
• HashMap uses hashing to store key-value pairs in an array.

• It allows null keys and values.

• HashMap is not synchronized, use ConcurrentHashMap for thread-safe operations.

• Example: HashMap map = new HashMap<>(); map.put("apple", 5); int value = map.get("apple");
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Q4. Few implementation of SQL queries
Ans. 
Various SQL queries for data manipulation and retrieval
• SELECT * FROM table_name WHERE condition;

• UPDATE table_name SET column_name = value WHERE condition;

• DELETE FROM table_name WHERE condition;

• INSERT INTO table_name (column1, column2) VALUES (value1, value2);
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