Nagarro Software Engineer II Interview Questions and Answers

Q1. To find sum of even numbers from given arraylist using stream api
Ans. 
Using stream API to find the sum of even numbers from an ArrayList
• Convert the ArrayList to a stream using the stream() method

• Filter the stream to keep only the even numbers using the filter() method

• Use the mapToInt() method to convert the stream of even numbers to an IntStream

• Finally, use the sum() method to calculate the sum of the even numbers
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Q2. Oops ,java 8 concepts,exceptions,project discussions
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Q3. Which interface used to prevent SQL injection
Ans. 
Prepared Statements interface is used to prevent SQL injection.
• Prepared Statements interface is used to parameterize the SQL queries.

• It allows the separation of SQL code and user input.

• It helps to prevent SQL injection attacks by automatically escaping special characters.

• Examples: PDO, mysqli, Java PreparedStatement, etc.
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Q4. Why string is imutable
Ans. 
String is immutable to ensure data integrity and thread safety.
• Immutable strings prevent accidental modification of data.

• Immutable strings allow for efficient memory allocation and sharing.

• Immutable strings ensure thread safety by avoiding race conditions.

• Examples of immutable string methods include substring, toLowerCase, and toUpperCase.
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Q5. Java oops concept and example each type
Ans. 
Java OOPs concepts and examples
• Encapsulation - hiding data and methods within a class (e.g. private variables)

• Inheritance - creating new classes from existing ones (e.g. subclass extends superclass)

• Polymorphism - using a single method to perform different actions (e.g. method overloading/overriding)

• Abstraction - focusing on essential features and hiding implementation details (e.g. abstract classes/interfaces)
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It consists of mathematical and some programming questions

Q1. Statistical and Mathematics questions
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Q2. And some Excel and SQL questions.
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Q1. Questions regarding projects.
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Q1. Where do we use BigInteger in java ?
Ans. 
BigInteger is used for mathematical operations involving very large integers in Java.
• BigInteger is used when the range of values supported by primitive data types like int and long is not sufficient.

• It is commonly used in cryptography and security applications.

• It provides methods for arithmetic, bitwise, and logical operations on large integers.

• Example: calculating factorial of a large number, generating large prime nu
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Q2. Merge Sort Algo code in java
Ans. 
Merge Sort Algo code in java
• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Time complexity: O(n log n)
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Q1. Major questions from finance back ground and personal questions related to introduction an all
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Q1. Questions related to Financial market
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Q1. Total Experience asking about feasible interview date and time slot fixing
Ans. Explaining to HR about my over all experience and years of experince..
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Q1. Asking questions from core experience
Ans. Answering them about Logistics,Reverse Logistics, Indirect Sourcing,Asset Management,3PL,Vendor and Supplier Management as i am from Supply chain Mangement Vertical
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Q1. Asking questions on real time scenario basis
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Q1. Asking questions from Management aspect
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Q2. Answering all the answers promptly keeping positivity,logical thinking,
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Q1. HR related Questions
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