CS203 – Exam 1 Practice Test

40 Questions • True/False & Multiple Choice • Covers Weeks 1–6 • Easy / Foundational Level
Grounded in lecture review slides (CS203_week06REVIEW) and lab exercises

Section 1: OOP Fundamentals & Why OOP

Topics from Week 01 review slides — What is OOP, benefits of OOP

Question 1 — True / False

Object-oriented programming (OOP) allows programmers to define not only the data type of a data structure, but also the types of operations (functions) that can be applied to the data structure.

True
False

Question 2 — Multiple Choice

Which of the following is NOT a benefit of OOP as discussed in the review?

Security — binding data and functions together
Reusability — objects can be reused across applications
Easier Maintenance — modular design allows updating specific parts
Faster execution — OOP programs always run faster than procedural programs

Question 3 — True / False

The idea of OOP is to implement real-world entities like inheritance, hiding, and polymorphism in programming.

True
False

Question 4 — Multiple Choice

According to the lecture, the purpose of OOP is to bind together:

Files and directories
The data and the functions that operate on them
Hardware and software components
The user interface and the database

Section 2: Java Basics & Java vs Python

Compilation, JVM, types, syntax differences — from Week 01 review

Question 5 — True / False

Java is an interpreted language, while Python is a compiled language.

True
False

Question 6 — Multiple Choice

What does JVM stand for?

Java Variable Manager
Java Virtual Machine
Java Verified Module
Java Version Monitor

Question 7 — Multiple Choice

In Java, how do you signify blocks of code?

Indentation (whitespace)
Braces { }
Parentheses ( )
Square brackets [ ]

Question 8 — True / False

In Java, a semicolon ; signals the end of a statement. Your program will fail to compile if a statement does not end with a semicolon.

True
False

Question 9 — Multiple Choice

Java is described as a strongly and explicitly typed language. What does this mean?

Variable types are determined at runtime automatically
The programmer must specify the types of variables, function arguments, and return types
Variables can change their type during program execution
Types are optional and only used for documentation

Question 10 — Multiple Choice

The output from the Java compiler is called:

Machine code
Java bytecode
Assembly language
Source code

Question 11 — Multiple Choice

Which of the following is NOT a primitive type in Java?

int
boolean
String
double

Question 12 — Multiple Choice

In Java, && represents the logical ______ operator, and || represents the logical ______ operator.

OR, AND
AND, OR
NOT, AND
AND, NOT

Question 13 — Multiple Choice

Java was originally developed by James Gosling at:

Microsoft
Sun Microsystems
Apple
IBM

Question 14 — True / False

In Java, all functions (methods) must declare their return type.

True
False

Section 3: Classes & Objects

State, functionality, classes as blueprints — from Weeks 02–03 review

Question 15 — Multiple Choice

A class is best described as:

An instance of an object
A blueprint or description of an object
A variable that holds data
A method that returns a value

Question 16 — Multiple Choice

Given the analogy from the lecture: "Dog" is the class, "Scooby Doo" is the ______.

Method
Variable
Object (instance)
Package

Question 17 — Multiple Choice

In the lecture's Dog example, which of the following would be considered state (data) of the Dog object?

Bark()
Eat()
Weight, Name, Age, Color
Sleep()

Question 18 — True / False

Everything in Java is an Object, including primitive types like int and boolean.

True
False

Question 19 — Multiple Choice

Consider the following code from a Vehicle class. What is the return type of a constructor?

public class Vehicle {
    public Vehicle(int numWheels, int numDoors, String name) {
        // set member variables
    }
}

void
Vehicle
Constructors do not have a return type
Object

Question 20 — Multiple Choice

Looking at this code from the Book class used in Lab 3, what does the constructor do?

public Book(String n, int p, boolean s) {
    name = n;
    page = p;
    stock = s;
}

It returns a String representation of the Book
It initializes the member variables name, page, and stock with the given parameters
It prints the Book information to the console
It creates a copy of another Book object

Section 4: Encapsulation & Access Modifiers

public, private, protected — hiding implementation details — Weeks 03–05 review

Question 21 — Multiple Choice

Encapsulation is best described as:

Making all variables public so anyone can access them
Hiding implementation details and providing methods for data access and behavior
Creating multiple objects from the same class
Writing code without any classes

Question 22 — Multiple Choice

Which access modifier makes a member accessible only within the class it is declared in?

public
private
protected
static

Question 23 — True / False

According to the lecture, 99.99% of the time your member variables should be private.

True
False

Question 24 — Multiple Choice

The protected access modifier allows access from:

Only the same class
Any class in any package
Subclasses
Only the main method

Question 25 — Multiple Choice

In the Calculator class from Lab 6, what are get_first_number() and get_second_number() examples of?

public int get_first_number() {
    return num1;
}
public int get_second_number() {
    return num2;
}

Mutator methods (setters)
Accessor methods (getters)
Constructors
Static methods

Question 26 — Multiple Choice

An accessor method does what?

Changes the internal data of the object
Does not change the internal data — it returns information without modifying state
Deletes the object from memory
Creates a new instance of the class

Question 27 — True / False

According to the rule of thumb from lecture, you should design methods that are either accessors or mutators, but not both.

True
False

Section 5: Inheritance & Class Hierarchy

extends, super(), overriding, Object as root — Weeks 03–05 review

Question 28 — Multiple Choice

In the Lab 4 code below, what does extends mean?

public class BossCharacter extends GameCharacter {
    // ...
}

BossCharacter has no relationship to GameCharacter
BossCharacter inherits from GameCharacter (BossCharacter is a subclass of GameCharacter)
GameCharacter inherits from BossCharacter
BossCharacter replaces GameCharacter entirely

Question 29 — Multiple Choice

In the Lab 6 ScientificCalculator, what does super(a, b) do?

public ScientificCalculator(int a, int b) {
    super(a, b); // Call the constructor of the parent class
}

It calls the constructor of the parent class (Calculator)
It creates a new Calculator object
It overrides the parent constructor
It is a syntax error

Question 30 — True / False

According to the review, Object is the root of the class hierarchy in Java — all classes are subclasses of Object.

True
False

Question 31 — Multiple Choice

Which of the following is NOT inherited by a subclass?

Public member variables
Public methods
Constructors
Private member variables

Question 32 — Multiple Choice

In the Lab 4 BossCharacter, the @Override annotation on attack() means:

@Override
public int attack() {
    return super.attack() + 20;
}

A completely new method is being created that has nothing to do with the parent class
The method is changing the implementation of the parent's attack() method for this subclass
The parent's attack() method is being deleted
The method is being made private

Question 33 — Multiple Choice

From the review's Vehicle hierarchy, which is a correct class relationship?

         Vehicle
        /       \
    Car        Truck
   / | \
Hatchback Coupe Sedan

A Car is a Truck
A Vehicle is a Car
A Sedan is a Car, and a Car is a Vehicle
A Hatchback is a Truck

Section 6: Object References & toString()

References, mutation, toString(), equals() — from review slides

Question 34 — Multiple Choice

Consider this code from the review slides:

Greeter worldGreeter = new Greeter("World");
Greeter anotherGreeter = worldGreeter;
anotherGreeter.setName("Dave");

What does worldGreeter.sayHello() return?

"Hello, World!"
"Hello, Dave!"
null
A compilation error occurs

Question 35 — True / False

Because every object is of type Object, every object has a toString() method.

True
False

Question 36 — Multiple Choice

If you do not override toString(), the default implementation returns:

An empty string
The name of the class, an @ sign, and a hashcode
The values of all member variables
null

Section 7: Static Variables, Local vs Instance Variables & Design

Static members, variable scope, class design patterns — Weeks 04–06 review

Question 37 — True / False

A static variable belongs to individual objects of a class, not the class itself.

True
False

Question 38 — Multiple Choice

When should you use an instance variable instead of a local variable?

When the data can be computed each time a method is invoked
When the data has to survive a method call (persist beyond the method)
When you only use the variable inside a for loop
Never — always use local variables

Question 39 — True / False

String is an immutable class in Java — no method in String can modify the contents of the string.

True
False

Question 40 — Multiple Choice

According to the review, when identifying what should be a class (Abbot's method), you should look for:

Verbs in the problem description
Nouns in the problem description
Numbers in the problem description
Adjectives in the problem description

CS203 – Object Oriented Programming

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