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Free 1z0-829: Java SE 17 Developer Exam Questions and Answers
Last updated: March 29, 2025
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343-1z0-829: Java SE 17 Developer
#Question
Which of the following is true about method overriding?
A.
It cannot throw the same exception
B.
It can be done by changing the name method
C.
Return types must be exactly the same
D.
Access modifiers can be more restrictive
Correct Answer:
D
Method overriding allows access modifiers to be less restrictive; you can widen the visibility.
#Question
Which of the following best describes "method overloading"?
A.
Both A and C
B.
Only applicable to constructors
C.
Using the same method name with different parameters
D.
Changing the return type of the method
Correct Answer:
C
Method overloading refers to defining multiple methods with the same name but with different parameter types or counts.
#Question
When is an abstract method required to be implemented?
A.
None of the above
B.
Both A and B
C.
When a class implements an interface
D.
When a class is marked as abstract
Correct Answer:
B
An abstract method must be implemented in derived classes when a class is marked abstract or implements an interface.
#Question
Which of the following best describes "automatic garbage collection" in Java?
A.
It reduces memory leaks
B.
Automatic memory allocation
C.
Automatic memory cleaning of unreferenced objects
D.
Manual memory management
Correct Answer:
C
Java's automatic garbage collection process cleans up unused objects that are no longer referenced, helping manage memory effectively.
#Question
When is memory for an object allocated in Java?
A.
During method call
B.
At class loading
C.
At runtime
D.
At compile time
Correct Answer:
C
Memory for an object is allocated at runtime when a new instance is created.
#Question
Which of the following can be used to traverse the elements of a collection?
A.
All of the above
B.
for-each loop
C.
Stream
D.
Iterator
Correct Answer:
A
All listed methods can be employed to traverse the elements of a collection in Java.
#Question
Which of the following statements indicates correct usage of a generic method?
A.
All of the above
B.
void display(E item) { }
C.
void display(T item) { }
D.
void display(T item) { }
Correct Answer:
A
All the provided options are valid declarations of generic methods in Java.
343-1z0-829: Java SE 17 Developer
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