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Exam (elaborations)

Java Programming – 100+ Solved Exam Q&A on Methods, Control Flow, File I/O – CS101 – 2025/2026

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This document presents over 100 thoroughly answered Java exam questions for the Intro to Java Programming (CS101) course, updated and structured for the 2025/2026 academic year. It is designed for first-year Computer Science, Software Engineering, and IT students, especially those preparing for university exams, assessments, or foundational Java certifications such as OCAJP. Each question is followed by its verified correct answer, covering everything from method definitions and memory references to file handling and logical flow. The format includes theoretical concepts, practical examples, output-based logic tracing, and error-identification exercises—making it a complete tool for independent review, mock exams, or tutor-led assessment prep. Core topics covered: Method Fundamentals: parameters, return types, method scope, static methods, headers, and signatures Memory & Variables: object references, primitive data types, symbolic memory names, constants, nulls Control Flow & Logic: if-else, switch, boolean expressions, logical and relational operators Loop Structures: for, while, do-while, infinite loops, loop counting, nested loops File I/O Handling: FileWriter, PrintWriter, Scanner, reading from and appending to files, hasNext() Error Types: compile-time, runtime, logic, syntax errors, and debugging practices Program Execution: JVM, .java vs .class, bytecode, Java API usage, method overloading Operators & Evaluation: ternary operator, precedence, increment behavior (++i vs i++), expression solving GUI Reference: brief mention of layout management (FlowLayout) Data & Decision Constructs: sentinel values, flags, delimiter handling, conditional logic nesting The document also includes realistic code segments and their expected output, challenging students to engage with both syntax and logic. It is a perfect blend of concept review and applied problem-solving, helping learners strengthen both theoretical and practical understanding. Ideal for: University students in CS101 and Java Fundamentals Certification candidates preparing for foundational Java exams Bootcamp participants and self-taught developers Tutors compiling assessment material or practice exams Keywords: Java methods, Java exam questions, Java file I/O, Java method parameters, Java boolean logic, Java operators, Java loops, Java control flow, Java classes, Java memory reference, Java string handling, CS101 Java, Java ternary, Java output tracing, Java syntax errors

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Java Exam 2025/2026 Exam Questions
and Correct Answers | New Update



A method - 🧠ANSWER ✔✔may have zero or more parameters


When an object, such as a String, is passed as an argument it is -

🧠ANSWER ✔✔actually a reference to the object that is passed


In the method header the static method modifier means the method is

available to code outside the class. - 🧠ANSWER ✔✔False


Which of the following is not a part of a method call? - 🧠ANSWER ✔✔return

type


When an argument is passed to a method ________. - 🧠ANSWER ✔✔its

value is copied into the method's parameter variable

To create a method, you must write its ________. - 🧠ANSWER

✔✔Definition

,Values that are sent into a method are called ________. - 🧠ANSWER

✔✔arguments


A ________ type of method performs a task and then terminates. -

🧠ANSWER ✔✔void


In the header, the method name is always followed by ________. -

🧠ANSWER ✔✔parentheses


A parameter variable's scope is ________. - 🧠ANSWER ✔✔the method in

which the parameter is declared

A value-returning method can return a reference to a non-primitive type. -

🧠ANSWER ✔✔True


You must have a return statement in a value-returning method. -

🧠ANSWER ✔✔True


In a @return tag statement the description ________. - 🧠ANSWER

✔✔describes the return value


Constants, variables, and the values of expressions may be passed as

arguments to a method. - 🧠ANSWER ✔✔True

, In a general sense, a method is ________. - 🧠ANSWER ✔✔a collection of

statements that perform a specific task

In the following code, System.out.println(num) is an example of ________.

double num = 5.4;

System.out.println(num);


num = 0.0; - 🧠ANSWER ✔✔a void method


When you pass an argument to a method you should be sure that the

argument's type is compatible with ________. - 🧠ANSWER ✔✔the

parameter variable's data type

Given the following method, which of these method calls is valid? public

static void showProduct (double num1, int num2)

{

double product;

product = num1 * num2;

System.out.println("The product is " + product); } - 🧠ANSWER

✔✔showProduct(3.3, 55);




3
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