Java Programming for Complete Beginners - Java 16 - Step 02 - Java Reference Types – Puzzles

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Information Technology (IT), Architecture
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University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the initial value of a reference variable if it is not assigned any object?
Zero
Null
Undefined
Empty String
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When a reference variable is assigned to another, what is actually copied?
The object's properties
The memory location of the object
The object's methods
The entire object
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the equality operator behave differently for primitive variables compared to reference variables?
It checks memory location for both
It checks values for primitives and memory location for references
It checks memory location for primitives and values for references
It checks values for both
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you compare two reference variables that point to different objects with the same values?
The comparison throws an error
The comparison returns false
The comparison returns true
The comparison returns null
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If 'cat' and 'ref' are reference variables pointing to the same object, what will 'cat == ref' return?
False
True
Undefined
Null
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of 'dog == dog2' if both have the same values but are different objects?
True
False
Null
Undefined
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the equality operator compare for reference variables?
The type of the objects
The size of the objects
The values of the objects
The memory locations of the objects
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