Java Programming – Classes & Objects – 40+ Solved Q&A on Constructors, Overloading, Access Control – CS101 – 2025/2026

This document includes 40+ concise and fully solved questions and answers on Classes and Objects from the Intro to Java Programming (CS101) course, updated for the 2025/2026 academic year. It is designed for first-year students in Computer Science, Software Engineering, and Information Technology, offering foundational insight into Java’s object-oriented structure through clear terminology-based Q&A. The format is streamlined and fact-focused, ideal for quick revision, quiz prep, or flashcard-style study. All answers have been verified for accuracy and reflect the current Java SE standards. Topics covered include: Accessors and Mutators (Getters & Setters) Object Creation and the new Keyword Fields and Class Members Constructors: default, no-argument, and overloaded Access Modifiers: private vs public Method Overloading and Signatures Shadowing: resolving variable name conflicts Binding and Compile-Time Method Resolution Null References and Initialization Java Packages: explicit and wildcard imports Driver Classes and Object Creation in Programs Class Discovery and Code Structure Each term or concept is defined with clarity, making this document especially effective for: New Java learners needing a clear grasp of object-oriented vocabulary Students preparing for class tests or multiple-choice assessments Java developers reviewing terminology for certifications (e.g., OCAJP) Tutors designing flashcards or quiz resources for early Java units The concise layout and direct-to-the-point explanations make this a perfect companion for both beginners and revising students. Keywords: Java classes, Java objects, Java constructors, Java overloading, access modifiers, Java fields, Java methods, method signature, null reference, Java package import, wildcard import, getter setter, CS101 Java, class discovery, object instantiation