10+ Coforge Software Developer Interview Questions and Answers

Sum of numbers in a string with alphabets.

• Iterate through the string and check if each character is a number.

• If it is a number, add it to a running total.

• Return the total sum of all numbers in the string.

To change the name of the third person in a table with 4-5 names.

• Access the table

• Identify the third person's name

• Replace the name with the new name

Arraylist, linkedlist, map, and hashtable are data structures used in programming.

• Arraylist is a resizable array that can store any type of data.

• Linkedlist is a collection of nodes that contain data and a reference to the next node.

• Map is a collection of key-value pairs where each key is unique.

• Hashtable is similar to a map but is synchronized and does not allow null keys or values.

A prime number is a number that is only divisible by 1 and itself.

• Start by checking if the number is less than 2, as prime numbers start from 2.

• Use a loop to check if the number is divisible by any number from 2 to the square root of the number.

• If the number is divisible by any of these numbers, it is not prime.

• If the number is not divisible by any of these numbers, it is prime.

Abstract classes are classes that cannot be instantiated and can have both abstract and non-abstract methods. Interfaces are contracts that define the methods that a class must implement.

• Abstract classes can have constructors while interfaces cannot

• A class can implement multiple interfaces but can only inherit from one abstract class

• Abstract classes can have instance variables while interfaces cannot

• Interfaces can have default methods while abstract classes cannot

• Abstract cla...read more

Middleware is software that acts as a bridge between different applications or components.

• Middleware helps in communication between different software components

• It can be used to handle requests, responses, and data transformation

• Middleware can be declared in the configuration files of the software

VCS stands for Version Control System, a tool used to track changes in code and collaborate with other developers.

• VCS helps developers track changes in code over time

• It allows multiple developers to work on the same codebase without conflicts

• Common VCS tools include Git, SVN, and Mercurial

ASP.NET MVC is a web application framework developed by Microsoft, while .NET Core is a cross-platform, open-source framework.

• ASP.NET MVC is a framework for building web applications using the Model-View-Controller pattern, while .NET Core is a general-purpose framework for building various types of applications.

• ASP.NET MVC is Windows-only, while .NET Core is cross-platform and can run on Windows, macOS, and Linux.

• ASP.NET MVC relies on the full .NET Framework, while .NET Core...read more

wait is used for synchronization between threads while sleep is used to pause the execution of a thread

• wait is used to wait for a specific condition to occur while sleep is used to pause the execution for a specific amount of time

• wait releases the lock on the object while sleep does not

• wait is called on an object while sleep is called on a thread

• wait can be interrupted by another thread while sleep cannot

start() method starts a new thread and calls the run() method, while run() method executes the code in the current thread.

• start() method creates a new thread and executes the code in the run() method of that thread.

• run() method executes the code in the current thread.

• Calling run() method directly does not create a new thread.

• start() method can be called only once, while run() method can be called multiple times.

Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.

• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and helps in creating a hierarchy of classes

• Derived class can access the properties and methods of the base class

• Example: Class 'Car' can inherit from class 'Vehicle' to reuse common attributes like 'color' and 'speed'

Collection frameworks in Java provide a set of classes and interfaces to store and manipulate groups of objects.

• Collection frameworks provide reusable data structures like lists, sets, and maps.

• They offer algorithms to manipulate and access the elements in these data structures.

• Examples include ArrayList, HashSet, and HashMap in Java.

A linked list is a data structure where each element points to the next element, allowing for dynamic size and efficient insertion/deletion.

• Linked list is made up of nodes, each containing data and a reference to the next node.

• Insertion and deletion operations are efficient in linked lists compared to arrays.

• Examples of linked list applications include implementing stacks, queues, and adjacency lists in graphs.