TCS iON Interview Questions, Process, and Tips

Q1. Why python is called interpreted language
Ans. 
Python is called an interpreted language because it executes code line by line at runtime.
• Python code is not compiled into machine code before execution, instead it is translated into intermediate code which is then interpreted by the Python interpreter.

• This allows for easier debugging and dynamic typing, as code can be executed and tested immediately without the need for compilation.

• Interpreted languages like Python a...read more
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Q2. How to run python file
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To run a Python file, use the command 'python filename.py' in the terminal.
• Open the terminal or command prompt

• Navigate to the directory where the Python file is located

• Run the command 'python filename.py' to execute the file
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Q1. What is the process to find a substring within an array?
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Q2. Array based question
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U can search in youtube

Q1. Swap 2 numbers without 3rd variable
Ans. 
To swap two numbers without a third variable, use arithmetic operations.
• Use addition and subtraction to swap the numbers

• Example: a = 5, b = 10. a = a + b (a = 15), b = a - b (b = 5), a = a - b (a = 10)
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Q2. Give me unique values in a column (sql)
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Use the DISTINCT keyword in SQL to retrieve unique values in a column.
• Use the SELECT DISTINCT statement followed by the column name to retrieve unique values.

• For example, SELECT DISTINCT column_name FROM table_name;

• You can also use GROUP BY to get unique values in a column.
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Q3. Project questions->what u have mentioned in resume
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Q4. Some simple hr questions
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Basic apt, advanced apt - 90 min

Q1. What is Maven? where it used ? what it use case ?
Ans. 
Maven is a build automation tool used primarily for Java projects to manage dependencies, build processes, and project documentation.
• Maven is used to manage project dependencies by automatically downloading required libraries from repositories.

• It simplifies the build process by providing a standard way to build, test, and package projects.

• Maven uses a project object model (POM) file to define project structure, depende...read more
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Q2. Spring (again based on the resume)
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Q3. Simple Java Program?
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Q4. JDBC ? HOW WE USE IT ?
Ans. 
JDBC is a Java API for connecting and executing SQL queries on a database.
• JDBC stands for Java Database Connectivity.

• It allows Java programs to interact with databases.

• We use JDBC by loading the driver, establishing a connection, creating a statement, executing queries, and handling results.

• Example: Class.forName("com.mysql.jdbc.Driver"); Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/databas
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