31.) Which terminal operation in the Streams API returns the first element of the stream, or a default value if the stream is empty?
A) findFirst()
B) findAny()
C) getFirst()
D) getAny()
32.) Can a class inherit a default method with the same name from multiple interfaces?
A) No, it results in a compilation error.
B) Yes, but the class must override the method.
C) Yes, and it can choose which method to use.
D) No, interfaces cannot have methods with the same name.
33.) What does the flatMap() intermediate operation do in the Streams API?
A) It maps each element to a new element.
B) It transforms a stream of streams into a single stream.
C) It filters elements based on a predicate.
D) It counts the elements in the stream.
34.) In parallel streams, which factor determines the number of CPU cores used for parallel processing?
A) Number of stream elements
B) JVM heap size
C) Explicitly set parallelism level
D) Number of available threads
35.) Which method reference syntax is used for instance method references?
A) Class::staticMethod
B) Class::instanceMethod
C) ::instanceMethod
D) ::new
36.) In the Optional class, what method is used to perform an action only if a value is present?
A) ifPresent()
B) orElse()
C) ifNull()
D) orElseGet()
