In Java, which collection class does not allow duplicate elements and is typically implemented as a binary tree?
A. HashSet
B. ArrayList
C. LinkedList
D. TreeSet
Answer: Option D
This Question Belongs to Java Program >> Miscellaneous In Java
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In Java, which keyword is used to explicitly call the superclass constructor?
A. parent()
B. extends
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What is the output of the following code snippet in Java? `System.out.println("5 + 2 = " + 5 + 2);`
A. 5 + 2 = 7
B. 7
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D. Compilation Error
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A. To execute SQL queries
B. To return a unique identifier for an object
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