TCS iON Ninja Interview Questions and Answers

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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)
Ans. 
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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1 round is very hard u have to prepare well.

Easy to hard coding questions prepare DSA .

Mcqs questions based on aptitude like pipe and cistern, man and work

Q1. Dynamic memory allocation
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Q2. Star pattern coding question
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