Ramco Systems Programmer Interview Questions and Answers

Q1. What is normalization
Ans. 
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down data into smaller, more manageable tables

• It helps in reducing data redundancy by eliminating duplicate data

• Normalization ensures data integrity by enforcing relationships between tables

• There are different levels of normalization such as 1NF, 2NF, 3NF, and BCNF
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Q2. What is correlated subquery
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A correlated subquery is a subquery that references a column from a table in the outer query.
• Correlated subqueries are executed for each row processed by the outer query

• They can be used to filter results based on values from the outer query

• Example: SELECT * FROM table1 WHERE column1 = (SELECT MAX(column2) FROM table2 WHERE table1.id = table2.id)
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Q3. What is diff between in and exists
Ans. 
IN is used to check if a value exists in a list of values, while EXISTS is used to check if a subquery returns any rows.
• IN is used with a list of values, while EXISTS is used with a subquery

• IN returns true if the value is found in the list, while EXISTS returns true if the subquery returns any rows

• IN is typically used with a WHERE clause, while EXISTS is used in a subquery
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Q1. Tell about your roles and responsibility
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Most difficult aptitude questions in 1st round

Q1. Tell me about yourself
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Q2. Coding basics in sql
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Q1. SQL Commands, DDL, DML
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Q2. Joins related query
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Q3. Tell me about yourself?
Ans. 
I am a passionate programmer with a strong background in computer science and experience in various programming languages.
• Graduated with a degree in Computer Science

• Proficient in languages such as Java, Python, and C++

• Experience with web development frameworks like React and Angular

• Worked on projects involving database management and data analysis
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Q1. Sql Joins related
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Q2. Sql commands related
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