What is the result of evaluating the expression ("Java" == new String("Java")) in Java?
Option C is correct. The '==' operator checks reference equality (memory location). "Java" points to String Constant Pool memory while new String("Java") allocates a new object on the Heap.
Which method of the java.lang.Object class must be overridden to compare the actual logical content of two Java objects?
Option B is correct. The equals() method compares object logical equality. By default in Object class, it uses '==', but classes like String and Integer override it to compare content.
What is the main advantage of the Java Garbage Collector (GC)?
Option B is correct. Java Garbage Collector operates in the background on the Heap memory, destroying unreferenced objects automatically and relieving developers of manual memory management (like C++ delete).
Which operator in Java is used to dynamically instantiate an object and allocate heap memory?
Option C is correct. The 'new' operator in Java allocates memory on the Heap for a new object and calls the constructor to initialize it.
What is a 'Constructor' in Java?
Option B is correct. Constructors have no return type (not even void) and share the exact name of the class. They initialize state upon object instantiation.