PR1-W6-Part1-OOP_Classes&Objects | Baamboozle - Baamboozle

10. What is the output? (3)

2 (Static field count is shared across all objects. Each constructor increments once)

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seesaw

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rocket

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fairy

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banana

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7. What is the output? (2)

Fido (d1 and d2 refer to the same object → changing through one affects the other.)

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5. Which of the following best describes encapsulation? (2)

B (Encapsulation uses private fields and public getters/setters or methods to control access)

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eraser

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gold

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fairy

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lifesaver

Give 10 points!

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13. What does the expression a == b test when a and b are object references? (3)

B ( == compares references for objects. equals() can be overridden to compare content.)

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4. Which statement about the main method is correct? (2)

B (JVM calls public static void main(String[] args) without creating an object, so main is static)

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2. Which of the following is not a primitive type in Java? (1)

C. String

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Won 25 points

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12. Which is true about static fields? (2)

B (Only one copy of a static field exists per class loader; all instances share it)

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gold

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gift

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lifesaver

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11. Which keyword refers to the current instance inside an instance method or constructor? (2)

C. this

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9. What is printed? (3)

70.0 (Withdraw subtracts from balance, leaving 70)

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21. Which of the following is a valid reason to make a field private and use getters/setters? (2)

C (Private fields prevent arbitrary external modification; setters can validate values)

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15. Given String s1 = "hi"; String s2 = "hi";, what is s1 == s2? (3)

B ( String literals are interned; identical literals refer to the same object in the string pool, so == is true)

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3. What does a class represent in object-oriented programming? (1)

B (A class defines fields and methods. Instances (objects) are created from that blueprint.)

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