Coforge Graduate Engineer Trainee (Get) Interview Questions and Answers

Inheritance is a mechanism in Java where a class acquires the properties and methods of another class.

• A subclass can inherit properties and methods from a superclass

• The keyword 'extends' is used to create a subclass

• A subclass can override methods of the superclass

• Java does not support multiple inheritance, but it can be achieved through interfaces

Polymorphism is the ability of an object to take on many forms.

• Polymorphism allows objects of different classes to be treated as if they are of the same class.

• It can be achieved through method overloading or method overriding.

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

• Polymorphism helps in achieving code reusability and flexibility.

OS stands for Operating System. It is a software that manages computer hardware and software resources.

• OS is the interface between the user and the computer hardware.

• It manages memory, processes, and input/output devices.

• Examples of OS include Windows, macOS, Linux, and Android.

• Types of OS include single-user, multi-user, real-time, and embedded.

• OS can be classified based on their architecture, such as 32-bit or 64-bit...read more

I am a passionate engineering graduate with a strong foundation in software development and a keen interest in innovative technologies.

• Educational Background: I hold a Bachelor's degree in Engineering from XYZ University, where I graduated with honors and completed projects in software development.

• Internship Experience: During my internship at ABC Company, I worked on developing a web application that improved user eng...read more

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 of the same class.

• Polymorphism allows objects to be used in a flexible and dynamic way

• It enables the use of a single interface to represent multiple types of objects

• Examples include method overloading, method overriding, and interfaces

• For example, a shape class can have multiple subclasse...read more

Inheritance is a mechanism in OOP where a new class is derived from an existing class.

• Inheritance allows the new class to inherit the properties and methods of the existing class.

• The existing class is called the base class or parent class, while the new class is called the derived class or child class.

• Syntax in Java: class ChildClass extends ParentClass { //class body }

Reverse a string using built-in function or loop through the string.

• Use built-in function like reverse() in Python or loop through the string and swap characters.

• In C++, use swap() function to swap characters in the string.

• In Java, use StringBuilder class to reverse the string.

• In JavaScript, use split(), reverse() and join() functions to reverse the string.

Exception handling is the process of handling errors that occur during program execution. Garbage collector is a program that automatically frees up memory space.

• Exception handling is used to prevent program crashes due to errors.

• It involves catching and handling errors using try-catch blocks.

• Garbage collector is used to automatically free up memory space that is no longer being used by the program.

• It helps prevent mem...read more

Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.

• Data structures are used to manage large amounts of data efficiently.

• They provide a way to store and organize data in a way that makes it easy to access and manipulate.

• Examples of data structures include arrays, linked lists, stacks, queues, trees, and graphs.

• Algorithms are a set of instructions that ar...read more

Tree traversal is the process of visiting each node in a tree data structure exactly once.

• There are three types of tree traversal: Inorder, Preorder, and Postorder.

• Inorder traversal visits the left subtree, then the root, then the right subtree.

• Preorder traversal visits the root, then the left subtree, then the right subtree.

• Postorder traversal visits the left subtree, then the right subtree, then the root.

• Examples: In...read more

A bandpass filter is a type of electronic filter that allows a specific range of frequencies to pass through while blocking others.

• It is used to separate a specific frequency range from a signal.

• It consists of a combination of low-pass and high-pass filters.

• It is commonly used in audio and radio frequency applications.

• Examples include tuning circuits in radios and audio equalizers.

• Bandwidth and center frequency are imp...read more

Cutoff frequency is the frequency at which a filter attenuates a signal by half its power.

• Cutoff frequency is a characteristic of filters used in signal processing.

• It is the frequency at which the filter starts to attenuate the signal.

• For low-pass filters, frequencies below the cutoff frequency are passed through, while frequencies above are attenuated.

• For high-pass filters, frequencies above the cutoff frequency are p...read more

SDLC stands for Software Development Life Cycle, which is a process used to design, develop, and maintain software.

• SDLC is a structured approach to software development.

• It involves several stages such as planning, designing, coding, testing, and maintenance.

• Each stage has its own set of activities and deliverables.

• The goal of SDLC is to produce high-quality software that meets the customer's requirements.

• Examples of SD...read more

32-bit processors can handle 2^32 bits of data at a time, while 64-bit processors can handle 2^64 bits of data at a time.

• 32-bit processors can address up to 4GB of RAM, while 64-bit processors can address much more.

• 64-bit processors are generally faster and more efficient than 32-bit processors.

• 64-bit processors can run both 32-bit and 64-bit applications, while 32-bit processors can only run 32-bit applications.

• 64-bit...read more

I possess strong analytical skills and a commitment to continuous learning, but I sometimes struggle with time management under pressure.

• Strength: Strong analytical skills - I excel at breaking down complex problems, as demonstrated in my final year project where I analyzed data trends.

• Strength: Commitment to continuous learning - I regularly take online courses to enhance my skills, such as a recent certification in d...read more