84+ Nagarro Technical Interview Questions And Answers

As Nagarro is a multinational software development and technology consulting company, you might understandably feel nervous and wonder about the questions that will be asked during the interview. Technical interviews are designed to assess your knowledge, problem-solving skills, and ability to think critically under pressure. To assist you in preparing and feeling confident for your interview, we have compiled a list of Nagarro technical interview questions. These questions cover various topics and will help you showcase your skills effectively. Good luck!

Nagarro technical interview questions

What is your experience with object-oriented programming?
Answer: I have experience with object-oriented programming in Java, C++, and Python. I am familiar with concepts such as inheritance, polymorphism, and encapsulation.

What is the difference between an abstract class and an interface?
Answer: An abstract class can have method implementations, while an interface can only have method declarations. A class can implement multiple interfaces, but it can only inherit from one abstract class.

What is the difference between a stack and a queue?
Answer: A stack is a Last-In-First-Out (LIFO) data structure, while a queue is a First-In-First-Out (FIFO) data structure.

What is a binary search tree?
Answer: A binary search tree is a data structure where each node has at most two children, and the left subtree of a node contains only nodes with values less than the node’s value, while the right subtree contains only nodes with values greater than the node’s value.

What is recursion?
Answer: Recursion is a programming technique where a function calls itself in order to solve a problem. It can be used to solve problems that can be broken down into smaller subproblems.

What is a hash table?
Answer: A hash table is a data structure that uses a hash function to map keys to values. It provides constant-time average case lookup, insert, and delete operations.

What is the difference between a linked list and an array?
Answer: An array has a fixed size and its elements are stored in contiguous memory locations, while a linked list can grow or shrink dynamically and its elements are stored in non-contiguous memory locations.

What is polymorphism?
Answer: Polymorphism is the ability of objects to take on different forms. In object-oriented programming, it allows different objects to be treated as if they are of the same type.

What is the difference between a private and a protected method or variable?
Answer: A private method or variable can only be accessed within the same class, while a protected method or variable can be accessed within the same class or any subclass.

What is a virtual function?
Answer: A virtual function is a function that is declared in a base class and is intended to be overridden in a derived class. It allows the implementation of a function to be chosen at runtime based on the actual type of an object.

What is a deadlock?
Answer: A deadlock is a situation where two or more processes are blocked, waiting for each other to release resources that they need to proceed.

What is a race condition?
Answer: A race condition is a situation where the behavior of a program depends on the relative timing of events or processes, and the outcome is unpredictable.

What is the difference between a process and a thread?
Answer: A process is an instance of a program in execution, while a thread is a lightweight execution unit within a process. A process has its own memory space, while threads share the same memory space.

What is an operating system?
Answer: An operating system is a software system that manages hardware resources and provides services to applications. It is responsible for scheduling tasks, managing memory, and providing access to input/output devices.

What is a kernel?
Answer: The kernel is the core component of an operating system. It provides low-level services to applications, such as memory management, process management, and device drivers.

Nagarro technical interview questions for experienced

What is your experience with design patterns?
Answer: I have experience with several design patterns, including Singleton, Factory, Observer, and Decorator. I have used them to improve the maintainability, extensibility, and testability of my code.

What is the difference between an abstract class and an interface in C#?
Answer: In C#, an abstract class can have method implementations and instance variables, while an interface can only have method signatures. A class can implement multiple interfaces, but it can only inherit from one abstract class.

What is the SOLID principle?
Answer: The SOLID principle is a set of five principles of object-oriented design, including Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion. They aim to make software designs more modular, flexible, and maintainable.

What is dependency injection?
Answer: Dependency injection is a technique for managing the dependencies of objects in a program. It involves passing dependencies as arguments to constructors or methods, rather than creating them directly within the object.

What is a microservice architecture?
Answer: A microservice architecture is an approach to software architecture that involves building a system as a collection of small, independent services that communicate through APIs. Each service is responsible for a specific business capability and can be developed, deployed, and scaled independently.

What is a distributed system?
Answer: A distributed system is a collection of independent computers that work together to provide a unified service. They communicate through message passing or shared memory, and can provide fault tolerance, scalability, and performance benefits.

What is a NoSQL database?
Answer: A NoSQL database is a non-relational database that uses a flexible data model, such as key-value, document, or graph. They are designed to handle large volumes of unstructured or semi-structured data, and can provide scalability and performance benefits.

What is a RESTful API?
Answer: A RESTful API is an API that adheres to the principles of Representational State Transfer (REST). It uses HTTP methods (GET, POST, PUT, DELETE) to access and manipulate resources identified by URLs, and returns responses in a standardized format (JSON or XML).

What is a message queue?
Answer: A message queue is a type of middleware that allows different applications or services to communicate asynchronously through messages. They can provide reliability, scalability, and loose coupling between components.

What is a load balancer?
Answer: A load balancer is a device or software that distributes incoming network traffic across multiple servers or instances. They can provide scalability, fault tolerance, and performance benefits.

What is a container?
Answer: A container is a lightweight, standalone executable package of software that includes everything needed to run an application, including code, libraries, and dependencies. They can provide portability, scalability, and isolation between applications.

What is a Kubernetes cluster?
Answer: A Kubernetes cluster is a collection of nodes that run containerized applications and are managed by the Kubernetes orchestration system. It provides features such as load balancing, scaling, and rolling updates, and can be run on-premises or in the cloud.

What is continuous integration?
Answer: Continuous integration is a software development practice where code changes are frequently integrated into a shared repository and automatically tested and built. It can help detect and resolve integration issues early, and improve code quality and productivity.

Nagarro technical interview questions for freshers

What is your experience with programming languages?
Answer: I have experience with programming languages such as Java, Python, and C++. I have completed projects in these languages and I am familiar with their syntax and best practices.

What is object-oriented programming?
Answer: Object-oriented programming (OOP) is a programming paradigm that emphasizes the use of objects and classes. It allows for encapsulation, inheritance, and polymorphism, which can improve code organization and reusability.

What is the difference between an array and a linked list?
Answer: An array is a data structure that stores a fixed-size sequential collection of elements of the same type, while a linked list is a data structure that stores a collection of elements in nodes, where each node points to the next node. Linked lists can have variable size, but accessing elements can be slower than with arrays.

What is recursion?
Answer: Recursion is a programming technique where a function calls itself repeatedly until a certain condition is met. It can be used to solve problems that can be broken down into smaller subproblems, such as searching or sorting.

What is a database?
Answer: A database is a structured collection of data that is organized and stored in a way that allows for efficient retrieval and manipulation. It can be relational or non-relational, and is commonly used for storing and managing information in software applications.

What is SQL?
Answer: SQL (Structured Query Language) is a programming language used for managing and manipulating data in a relational database. It is used to create, modify, and retrieve data from tables, and can be used to perform complex queries and join multiple tables.

What is an API?
Answer: An API (Application Programming Interface) is a set of protocols and tools used for building software applications. It allows different applications to communicate with each other through standardized interfaces, and can provide access to data and functionality from other applications or services.

What is a data structure?
Answer: A data structure is a way of organizing and storing data in a computer program. It can be used to represent and manipulate different types of data, and can provide efficient access and retrieval of information.

What is a function?
Answer: A function is a block of code that performs a specific task and can be called from other parts of a program. It can take input parameters and return output values, and can be used to modularize code and improve code organization.

What is a loop?
Answer: A loop is a programming construct that allows code to be executed repeatedly based on a condition. It can be used to iterate over arrays or other data structures, or to perform a certain action a specific number of times.

What is a variable?
Answer: A variable is a storage location in a computer program that holds a value or reference to a value. It can be used to store data temporarily or permanently, and can be manipulated or updated by the program.

What is debugging?
Answer: Debugging is the process of finding and fixing errors or bugs in a computer program. It can involve using tools such as print statements, breakpoints, or error messages to identify the source of the problem, and then modifying the code to correct it.

What is version control?
Answer: Version control is a system used for managing changes to a codebase over time. It allows multiple developers to work on the same codebase simultaneously, tracks changes made to the code, and can provide rollback or merge functionality.

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Nagarro technical support interview questions

How do you troubleshoot network connectivity issues?
Answer: I start by checking if the device is connected to the network, and then checking if the IP address is correct. If necessary, I restart the device, check network settings, and verify if there are any firewall rules that could be blocking connectivity.

How do you handle a user who is unable to log in to their account?
Answer: I would first verify if the user is using the correct login credentials, and then check if the account is active and not locked out. If necessary, I would reset the password or unlock the account to allow the user to log in.

How do you diagnose a system performance issue?
Answer: I start by checking system resource usage, such as CPU and memory usage, to see if there are any bottlenecks. I then check for any errors or warnings in system logs, and verify if there are any applications or processes that could be causing the performance issue.

What is your experience with Active Directory?
Answer: I have experience with managing user accounts, groups, and permissions in Active Directory, as well as configuring group policies and managing domain controllers.

How do you handle a user who has lost their data?
Answer: I would first check if there are any backups available, and then try to recover the data using data recovery tools or services. If necessary, I would escalate the issue to a higher level of support.

What is your experience with remote desktop tools?
Answer: I have experience with using remote desktop tools such as TeamViewer and Remote Desktop Protocol (RDP) to remotely access and manage systems.

How do you troubleshoot printer connectivity issues?
Answer: I start by checking if the printer is powered on and connected to the network, and then verifying if the correct printer drivers are installed on the device. If necessary, I would restart the printer spooler service or reinstall the printer drivers.

What is your experience with backup and recovery solutions?
Answer: I have experience with configuring and managing backup and recovery solutions such as Windows Backup, Veeam Backup, and Acronis Backup.

How do you handle a user who has forgotten their password?
Answer: I would first verify the user’s identity and then reset their password according to company policy. If necessary, I would guide the user through the password reset process.

How do you handle a user who is experiencing email issues?
Answer: I start by verifying the user’s email settings, such as incoming and outgoing mail server settings and login credentials. If necessary, I would check the email server logs and troubleshoot any issues with the mail server.

What is your experience with anti-virus and anti-malware software?
Answer: I have experience with configuring and managing anti-virus and anti-malware software such as Norton, McAfee, and Malwarebytes.

How do you handle a system that has been infected with malware?
Answer: I would first isolate the infected system from the network to prevent further spread of the malware, and then run a full system scan using anti-virus and anti-malware software. If necessary, I would restore the system from a backup or reinstall the operating system.

What is your experience with virtualization technologies?
Answer: I have experience with using virtualization technologies such as VMware and Hyper-V to create and manage virtual machines.

Nagarro java technical interview questions

What is the difference between an abstract class and an interface in Java?
Answer: An abstract class can have both concrete and abstract methods, while an interface can only have abstract methods. An abstract class can also have instance variables, while an interface cannot.

What is the difference between a final, finally, and finalize keyword in Java?
Answer: The final keyword is used to declare a variable, method, or class as constant and unmodifiable. The finally keyword is used to define a block of code that will be executed after a try-catch block, regardless of whether an exception is thrown or not. The finalize() method is called by the garbage collector to perform any cleanup tasks before an object is destroyed.

What is polymorphism in Java?
Answer: Polymorphism is the ability of an object to take on multiple forms. In Java, it can be achieved through method overloading and method overriding.

What is a package in Java?
Answer: A package in Java is a group of related classes and interfaces that can be organized into a single unit for easier management and maintenance.

What is a constructor in Java?
Answer: A constructor in Java is a special method that is used to initialize objects of a class. It has the same name as the class and does not have a return type.

What is the difference between a private and protected access modifier in Java?
Answer: A private access modifier restricts access to members of the same class, while a protected access modifier allows access to members of the same class and subclasses.

What is the difference between a static and non-static method in Java?
Answer: A static method belongs to the class and can be accessed without creating an instance of the class, while a non-static method belongs to an object of the class and can only be accessed through that object.

What is the difference between a StringBuilder and StringBuffer in Java?
Answer: Both StringBuilder and StringBuffer are used to manipulate strings, but StringBuffer is thread-safe, while StringBuilder is not.

What is the purpose of the transient keyword in Java?
Answer: The transient keyword is used to indicate that a field should not be serialized during object serialization.

What is the difference between an ArrayList and LinkedList in Java?
Answer: An ArrayList is implemented as a resizable array and provides fast access to elements through index, while a LinkedList is implemented as a doubly-linked list and provides fast insertion and deletion operations.

What is a singleton class in Java?
Answer: A singleton class is a class that can only have one instance in the entire JVM. It is typically used to provide global access to a single object.

What is the purpose of the synchronized keyword in Java?
Answer: The synchronized keyword is used to provide thread safety by allowing only one thread to access a critical section of code at a time.

What is an exception in Java?
Answer: An exception in Java is an object that represents an error or abnormal condition that has occurred during the execution of a program.

What is the difference between checked and unchecked exceptions in Java?
Answer: Checked exceptions are checked at compile time and must be handled or declared by the method that throws them, while unchecked exceptions are not checked at compile time and do not need to be declared.

Nagarro technical round interview questions and answers

What is a RESTful API?
Answer: A RESTful API is an architectural style for creating web services that use HTTP requests to access and manipulate data. It uses HTTP verbs like GET, POST, PUT, and DELETE to perform operations on resources.

What is a foreign key in a database?
Answer: A foreign key is a column or set of columns in a table that references the primary key of another table. It is used to enforce referential integrity between related tables.

What is the difference between a stack and a queue?
Answer: A stack is a last-in, first-out (LIFO) data structure, while a queue is a first-in, first-out (FIFO) data structure.

What is a deadlock in computer science?
Answer: A deadlock is a situation in which two or more processes are blocked, waiting for each other to release resources that they need to continue executing.

What is a binary search?
Answer: A binary search is a search algorithm that works by repeatedly dividing the search interval in half until the target value is found or determined to be not present in the array.

What is the difference between static and dynamic linking?
Answer: Static linking is the process of linking the libraries or object files into the executable file at compile time, while dynamic linking is the process of linking the libraries at runtime.

What is the difference between TCP and UDP?
Answer: TCP (Transmission Control Protocol) is a reliable, connection-oriented protocol that provides error checking and flow control, while UDP (User Datagram Protocol) is an unreliable, connectionless protocol that does not provide these features.

What is a heap in computer science?
Answer: A heap is a data structure that stores a collection of elements in such a way that the smallest (or largest) element can be quickly retrieved.

What is an operating system?
Answer: An operating system is a software that manages computer hardware and software resources, provides common services for computer programs, and controls the execution of those programs.

What is a cache in computer science?
Answer: A cache is a small amount of memory that is used to store frequently accessed data, in order to speed up access to that data.

What is the difference between a static and dynamic web page?
Answer: A static web page is a web page that is served as-is, while a dynamic web page is generated on-the-fly by a web application or server in response to a user request.

What is a virtual machine in computer science?
Answer: A virtual machine is an emulation of a computer system that allows multiple operating systems or applications to run on a single physical machine.

What is a hash table?
Answer: A hash table is a data structure that stores key-value pairs and allows quick insertion, deletion, and retrieval of elements based on their keys.

What is a binary tree?
Answer: A binary tree is a tree data structure in which each node has at most two children, called the left child and the right child.

Preparing for a Nagarro technical interview can indeed be challenging, but thorough preparation can significantly boost your confidence and performance during the interview. Reviewing Nagarro technical interview questions can help you anticipate what to expect and prepare thoughtful responses. It’s crucial to showcase your technical skills, experience, and problem-solving abilities, demonstrating why you would be a valuable addition to the Nagarro team. With a positive attitude and dedication to your craft, you can excel in your Nagarro technical interview and potentially secure your dream job.