10+ Computer Operator and Computer Engineer Interview Questions and Answers

Advantages and disadvantages are the positive and negative aspects of a particular thing or situation.

• Advantages refer to the benefits or positive outcomes of a particular thing or situation.

• Disadvantages refer to the drawbacks or negative outcomes of a particular thing or situation.

• Advantages and disadvantages should be carefully considered before making a decision.

• Examples of advantages and disadvantages include: using technology in the classroom (advantage: increased engag...read more

A parameterized constructor is a constructor that takes parameters to initialize the object's properties.

• Parameterized constructors are used to initialize the object's properties with values passed as arguments.

• They are defined with parameters in the constructor signature.

• For example, a class Car may have a parameterized constructor that takes parameters for make, model, and year.

• Parameterized constructors can be overloaded to provide different ways of initializing the object...read more

My aim is to continuously learn and grow in my field, while contributing to the success of the organization.

• To constantly upgrade my skills and knowledge through training and self-learning

• To take on challenging projects and responsibilities to enhance my experience

• To work collaboratively with my team and share my knowledge and expertise

• To strive for excellence in all my tasks and contribute to the success of the organization

• For example, I aim to learn new programming language...read more

Multiple inheritance is a feature in object-oriented programming where a class can inherit from multiple parent classes.

• Allows a class to inherit properties and methods from multiple parent classes

• Can lead to the diamond problem where two parent classes have a common method or property

• Supported in some programming languages like C++, but not in others like Java

• Example: A class 'Student' can inherit from 'Person' and 'ScholarshipRecipient' classes

String class final is a keyword used in Java to prevent the modification of a string variable.

• When a string variable is declared as final, its value cannot be changed.

• Final string variables are often used to store constant values.

• Example: final String MESSAGE = "Hello World";

An object is an instance of a class which encapsulates data and behavior, while a class is a blueprint for creating objects.

• A class defines the properties and methods that an object will have

• An object is created from a class and can have its own unique values for the properties defined in the class

• Classes and objects are fundamental concepts in object-oriented programming

• Example: A class 'Car' can have properties like 'make', 'model', 'year', and methods like 'start', 'stop',...read more

Ethical hacking is the practice of testing computer systems and networks for vulnerabilities to improve their security.

• Ethical hacking is done with the permission of the system owner.

• It involves using the same techniques and tools as malicious hackers to identify weaknesses in the system.

• The goal is to find and fix vulnerabilities before they can be exploited by attackers.

• Ethical hackers must adhere to a strict code of ethics and ensure that their actions do not cause harm.

• Ex...read more

A default constructor is a constructor that is automatically generated by the compiler if no constructor is defined in a class.

• It has no parameters

• It initializes all instance variables to their default values

• It is used when an object is created without any arguments

• Example: public class Person { public Person() { } }

• Example: Person p = new Person();

A singleton class is a class that can only have one instance created at a time.

• It has a private constructor to prevent multiple instances

• It provides a global point of access to that instance

• It is often used for managing resources such as database connections

• Example: Java's Runtime class is a singleton class

A string character is a single unit of text, such as a letter, number, or symbol.

• A string is a sequence of characters

• String characters can be letters, numbers, symbols, or whitespace

• Examples of string characters include 'a', '1', '$', and ' '

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

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

• It is achieved through method overriding and method overloading.

• Example: A shape class can have different subclasses like circle, square, and triangle, each with their own implementation of the draw method.

• Example: A method can take in different types of objects as parameters, as long as they all implement the same interface or i...read more