Infosys Assistant System Engineer Interview Questions and Answers

SDLC stands for Software Development Life Cycle. Waterfall model is a linear sequential approach to SDLC.

• SDLC is a process used to design, develop, and test software.

• It consists of several phases such as planning, analysis, design, implementation, and maintenance.

• Waterfall model is a traditional approach to SDLC where each phase is completed before moving on to the next.

• It is a linear and sequential model that does not allow for changes once a phase is completed.

• Examples of o...read more

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

• OOPs is based on the four main concepts: Encapsulation, Inheritance, Polymorphism, and Abstraction.

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

• Inheritance is the process of inheriting the properties of one class by another class.

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

• Abstraction is the process of hiding the unnec...read more

OOPS concepts are fundamental to object-oriented programming. It includes inheritance, polymorphism, encapsulation, and abstraction.

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

• Polymorphism: the ability of an object to take on many forms

• Encapsulation: the process of hiding implementation details from the user

• Abstraction: the process of hiding complex implementation details from the user

• Example: A car is an object that has properties like col...read more

An operating system is a software that manages computer hardware and software resources.

• It acts as an interface between the user and the computer hardware.

• It provides services to applications and manages system resources.

• Examples include Windows, macOS, Linux, Android, iOS.

• It controls the allocation of memory, processing power, and input/output devices.

• It provides security and protection to the system and its data.

Compiler is a program that translates source code written in a high-level language into machine code.

• Compilers are used to convert human-readable code into machine-readable code.

• They perform lexical analysis, syntax analysis, semantic analysis, and code optimization.

• Examples of compilers include GCC, Clang, and Microsoft Visual C++.

A class file is a compiled Java program that contains bytecode instructions for the Java Virtual Machine to execute.

• Class files have a .class extension

• They are generated by the Java compiler from .java source files

• Class files are platform-independent and can be executed on any system with a Java Virtual Machine

• They contain information about the class name, superclass, interfaces, fields, and methods

A tuple is an ordered set of values or elements.

• Tuples are immutable, meaning their values cannot be changed once created.

• Tuples can contain elements of different data types.

• Tuples are often used to return multiple values from a function.

• Example: ('apple', 'banana', 'cherry')

• Example: (1, 'hello', True)