In StringBuilder class equals() method is not overridden for content comparison. Hence Object class equals() method will be executed which is meant for reference/address comparison. == operator is always meant for reference/address comparison only.

The following are invalid:

Predicate p = (int i)->i>10;

Predicate p = (int i)->{i>10;};

Input argument type is Integer but not int. Hence we will get compile time error.

If we execute Test class, the output is:

Cat...Cat

Cat...Dog

Dog...Cat

Dog...Dog

Inside try block ArithmeticException raised and handled. Hence every print statement will be executed. Hence the output is: ABCDEF

sb.delete(0,sb.length()); ==>This line removes total content of the StringBuilder. Hence after executing this line, the length will become 0.

RuntimeException and its child classes, Error and its child classes are unchecked exceptions. Except these remaining are considered as checked exceptions.

Inside catch block ArithmeticException raised which is uncaught and hence the program will be terminated abnormally by raising ArithmeticException. But before abnormal termination only finally block will be executed.

In the above code, only two Student objects got created, and at Line-1 only one Student object eligible for Garbage Collection, whose name is : Arjun

Error is the child class of Throwable.

Exception is the child class of Throwable.

Throwable is the parent class of both Exception and Error.

Exception is recoverable where as Error is non-recoverable.

If try,catch and finally blocks contains separate return statements, then finally block return statement will get more priority. Hence the output is :3