Nagarro Senior Staff Software Engineer Interview Questions and Answers

Q1. What happens when you enter google.com in the web browser?
Ans. 
When you enter google.com in the web browser, the browser sends a request to Google's servers, which then respond with the Google homepage.
• Browser sends a request to DNS server to resolve the domain name 'google.com' to an IP address

• Browser then sends a request to the IP address associated with 'google.com'

• Google's servers respond with the HTML content of the Google homepage

• Browser renders the HTML content and displays
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Q2. Explain different types of software testing?
Ans. 
Different types of software testing include unit testing, integration testing, system testing, and acceptance testing.
• Unit testing: Testing individual components or modules of the software in isolation.

• Integration testing: Testing how different modules work together as a group.

• System testing: Testing the entire system as a whole to ensure it meets requirements.

• Acceptance testing: Testing the software with end users to
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Q1. How do you seen yourself 2 years from now?
Ans. 
In 2 years, I see myself as a senior software engineer leading a team of developers on innovative projects.
• Leading a team of developers on innovative projects

• Taking on more responsibilities and challenges

• Continuing to learn and grow in my technical skills
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Q2. Do you think these skills are sufficient to become a project manager?
Ans. 
Possessing technical skills alone may not be sufficient to become a project manager.
• Project management requires a combination of technical skills, leadership abilities, communication skills, and organizational skills.

• Experience in managing projects, leading teams, and handling stakeholders is crucial for a project manager role.

• Certifications such as PMP (Project Management Professional) can also be beneficial in transi
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Q1. What is inheritance
Ans. 
Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.
• Allows for code reusability by creating a new class based on an existing class

• Derived class (subclass) inherits properties and behaviors from a base class (superclass)

• Can have multiple levels of inheritance, creating a hierarchy of classes

• Example: Animal class can be a base class with Dog and Cat
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Q2. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q3. Write a code for string reverse
Ans. 
Code to reverse a string using array of characters
• Iterate through half of the string and swap characters from start and end

• Use a temporary variable to store the character being swapped

• Handle edge cases like empty string or single character string
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Q1. Java questions and basics of testing
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2 coding questions and should complete one after another

60 min test with multiple choice questions

Q1. Live coding or some questions
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Merit and demerit of Machine learning ?

General Aptitude and reasoning

Q1. Oops concept, DBMS , Data Structure
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Q2. What is Normalisation?
Ans. 
Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.
• It involves dividing larger tables into smaller ones and defining relationships between them.

• Normalization helps to eliminate data inconsistencies and anomalies.

• There are different levels of normalization, such as first normal form (1NF), second normal form (2NF), and so on.

• Normalization can improve database pe...read more
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Q3. What is polimorphism?
Ans. 
Polymorphism is the ability of an object to take on many forms.
• It allows objects of different classes to be treated as if they were objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A shape class can have multiple subclasses like circle, square, etc. and all can be treated as shapes.

• Example: A method can take an object of a parent class as a parameter and it can accept a
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Q4. What is Stack and Pre and post Tree formation
Ans. 
Stack is a data structure that follows LIFO. Pre and post tree formation are methods of traversing a tree.
• Stack is used for backtracking, undoing, and recursion.

• Pre-order traversal visits the root node first, then left subtree, then right subtree.

• Post-order traversal visits the left subtree, then right subtree, then root node.
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Q1. Tell me about yourself
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Q2. Tell me About company ?
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Round duration - 90 minutes
Round difficulty - Medium

Q1. 
Height of a Binary Tree
You are provided with an arbitrary binary tree consisting of 'N' nodes where each node is associated with a certain value. The task is to determine the height of the tree.
Explana...read more
Ans. 
The height of a binary tree is the maximum number of edges from the root to a leaf node.
• Traverse the tree recursively and keep track of the maximum height

• If the current node is null, return 0

• Otherwise, calculate the height of the left and right subtrees and return the maximum height plus 1
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Q2. 
Trapping Rain Water Problem Statement
You are given a long type array/list ARR of size N, representing an elevation map. The value ARR[i] denotes the elevation of the ith bar. Your task is to determine th...read more
Ans. 
The question asks to calculate the total amount of rainwater that can be trapped in the given elevation map.
• Iterate through the array and find the maximum height on the left and right side of each bar.

• Calculate the amount of water that can be trapped on each bar by subtracting its height from the minimum of the maximum heights on both sides.

• Sum up the trapped water for all bars and return the total amount.
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Round duration - 45 minutes
Round difficulty - Medium

Q1. 
Merge Two Sorted Arrays Problem Statement
Given two sorted integer arrays ARR1 and ARR2 of size M and N, respectively, merge them into ARR1 as one sorted array. Assume that ARR1 has a size of M + N to hol...read more
Ans. 
The task is to merge two sorted arrays into one sorted array.
• Create a new array with size M + N to store the merged array

• Use two pointers to iterate through the elements of ARR1 and ARR2

• Compare the elements at the current pointers and add the smaller element to the new array

• Move the pointer of the array from which the element was added

• Repeat the process until all elements are merged

• If there are remaining elements in AR...read more
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Q1. Diff between HANA and ECC
Ans. 
HANA is an in-memory database platform while ECC is a traditional ERP system.
• HANA is designed to handle large amounts of data in real-time while ECC is not optimized for real-time processing.

• HANA uses column-based storage while ECC uses row-based storage.

• HANA has a simpler data model and can handle unstructured data while ECC has a more complex data model.

• HANA is a newer technology while ECC has been around for decades...read more
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Q2. Must know the details of FM's used in devlops
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Q1. SQL and COGNOS related questions were asked.
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Q1. SQL and cognos Related questions were asked.
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Q1. What is the expected CTC and few questions related to notice period and pay details.
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