10+ Infosys System Engineer Hardware Interview Questions and Answers for Freshers

Counting letter-pairs with same no. of letters left between them in the word SERVANT.

• Identify the letter-pairs in the word SERVANT.

• Count the number of letters between each pair.

• Compare the count with the position of the pair in the word.

• If they match, increment the count of such pairs.

• Answer the total count of such pairs.

Data hiding is hiding the implementation details while abstraction is hiding the complexity of the system.

• Data hiding is a technique to hide the implementation details of a class from the outside world.

• Abstraction is a technique to hide the complexity of the system by providing a simplified interface.

• Data hiding is achieved through access modifiers like private, protected, and public.

• Abstraction is achieved through abstract classes and interfaces.

• Data hiding is used to preven...read more

ACID properties are a set of properties that ensure reliability and consistency of data in a database.

• ACID stands for Atomicity, Consistency, Isolation, and Durability.

• Atomicity ensures that a transaction is treated as a single, indivisible unit of work.

• Consistency ensures that the database remains in a valid state before and after a transaction.

• Isolation ensures that concurrent transactions do not interfere with each other.

• Durability ensures that once a transaction is commit...read more

DELETE is a SQL command used to remove rows from a table.

• DELETE is used with the WHERE clause to specify which rows to remove

• It can also be used with JOIN to delete rows from multiple tables

• The deleted rows can be recovered using the ROLLBACK command

Learning Python as a newbie

• Start with basic syntax and data types

• Practice coding exercises and challenges

• Read documentation and watch tutorials

• Join online communities and forums for support

• Work on personal projects to apply knowledge

OOPs concepts are the fundamental principles of Object-Oriented Programming that help in designing and implementing software systems.

• Encapsulation: bundling of data and methods that operate on that data

• Inheritance: creating new classes from existing ones

• Polymorphism: ability of objects to take on multiple forms

• Abstraction: hiding implementation details and showing only functionality

• Examples: Java, C++, Python, Ruby

Place by value passes a copy of the value, while place by reference passes a reference to the original value.

• Place by value creates a new copy of the value, while place by reference uses the original value.

• Place by value is used for simple data types like integers and floats, while place by reference is used for complex data types like arrays and objects.

• An example of place by value is passing an integer to a function, while an example of place by reference is passing an arra...read more

OOPs principles are encapsulation, inheritance, and polymorphism.

• Encapsulation is the process of hiding implementation details from the user.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects to take on multiple forms or behaviors.

• Abstraction is the process of hiding complex implementation details from the user.

• Objects are instances of classes that contain data and behavior.

• Classes are templates for creating objects wit...read more

OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

• OOPS is based on four main concepts: encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation is the process of hiding the implementation details of an object from the outside world.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects of different classes to be treated as if they were of the same...read more

Scrum is an agile framework for managing and completing complex projects.

• Scrum involves a team working together to complete a project in short iterations called sprints.

• The team has daily stand-up meetings to discuss progress and plan for the day.

• Scrum emphasizes flexibility and adaptability to changing requirements.

• The product owner prioritizes the backlog of work and the team works to complete the highest priority items first.

• Scrum includes roles such as the Scrum Master, P...read more

A program to calculate factorial of a number.

• Take input from user

• Use a loop to multiply the number with all the numbers less than it

• Print the result

Java and C++ are object-oriented languages while C is a procedural language.

• Java and C++ have built-in support for object-oriented programming concepts like inheritance, polymorphism, and encapsulation.

• C++ allows for low-level memory manipulation and has better performance than Java.

• C is a procedural language and lacks the object-oriented features of Java and C++.

• C is commonly used for system programming and embedded systems.

• Java is platform-independent while C++ and C are pl...read more

An airplane flies due to the principles of aerodynamics and the use of engines to generate thrust.

• Airplanes generate lift through the shape of their wings and the Bernoulli's principle.

• Thrust is generated by the engines, which propel the airplane forward.

• The airplane's weight is counteracted by the lift generated by the wings.

• Control surfaces such as ailerons, elevators, and rudder are used to control the airplane's movement.

• Pilots use instruments and controls to monitor and ...read more

Stack, Queue, and Binary Search are common data structures used in computer science.

• Stack: Last In First Out (LIFO) data structure. Example: Undo/Redo feature in a text editor.

• Queue: First In First Out (FIFO) data structure. Example: Print queue in a printer.

• Binary Search: Efficient search algorithm for sorted arrays. Example: Searching for a word in a dictionary.