Java Programming – 100+ Exam Q&A on JVM, Type Casting, Operators, Editions – CS101

This exam-focused document provides over 100 multiple-choice and short-answer Java questions with verified answers, compiled for the Intro to Java Programming (CS101) course in the 2025/2026 academic year. Structured for clarity and high retention, it is ideal for first-year students in Computer Science, Software Engineering, and Information Technology, especially those preparing for theory-heavy Java exams or certifications like OCAJP. Each answer is directly marked as correct, with many questions covering Java fundamentals, type systems, the JVM, compilation workflow, bytecode behavior, operator precedence, and data type sizes. Several sections also explore Java editions (J2SE, J2EE, J2ME), platform independence, and comparisons with C/C++—making it a well-rounded academic support resource. Main topics covered: JVM & Compilation Concepts: .java → .class, javac, java, bytecode, class loader, JRE, JDK Java Editions & History: J2SE, J2ME, J2EE, Oak language origin, platform independence Data Types & Ranges: int, byte, short, float, double, literals, size in bytes/bits Type Casting & Conversion: widening vs narrowing, truncation behavior, type promotion Boolean & Relational Operators: ==, !=, , , =, =, expression evaluations Bitwise Operators: , , , precedence and use with primitive types Arithmetic Operators: associativity, postfix vs prefix, modulo logic, unary operators Access Modifiers & Visibility: public, private, method and class accessibility Java Syntax & Execution: main() method, method location, source file naming rules Control Structures: if, else, flow evaluation, loop conditions Program Execution Flow: class loading, bytecode interpretation, execution by JVM Common Errors & Misconceptions: public method access, valid keywords, compilation units String & System Output Methods: S(), println(), member access (.) Boolean Expressions: evaluation rules, valid literals (true, false) Relational Operator Priority: expression results and evaluation types This material is especially suited for: CS101 or introductory Java students preparing for written and MCQ-based exams Java beginners needing reinforcement on foundational and compiler-level concepts Certification candidates reviewing type systems, syntax, and operator logic Tutors assembling classroom quizzes or teaching Java fundamentals through concept checks Self-learners seeking a complete Java terminology and syntax practice guide Its exam-authentic phrasing, correctness assurance, and wide topical coverage make it a valuable study resource across theory-heavy programming modules. Keywords: Java JVM, Java bytecode, Java javac java, Java editions, Java class loader, Java type casting, Java widening conversion, Java narrowing, Java operator precedence, Java relational operators, Java boolean logic, Java float size, Java class execution, Java public private, Java CS101 exam