Java8 Innards.txt

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Object o = () -> {System.out.println(“Example”); }; Object o can be replaced with ? Runnable r--correct Lambda Expressions are based on Functional Programming--correct public interface Adder ... { String add(Function f); void add(Consumer f); } public class AdderImpl implements Adder { @Override public String add(Function<String, String> f) { return f.apply("Welcome "); } @Override public void add(Consumer<Integer> f) {} } On calling add() method as described below, String r = adderImpl.add(a -> a + " lambda"); System.out.println(r); Runtime error--correct Lambda Expressions in Java allow us to treat Code as data--correct which of the following are not valid lambda expressions? None of the options--correct Parameter types be inferred in Lambda expressions ? True--correct Which of the following is correct about Java 8 lambda expression? Both--correct Following lambda expression is valid (x, y) -> return x + y False--correct public class App{ public static void main(String [] args){ String name="WelcomeJava"; Runnable r1=() -> System.out.println(name); String name1=""; name1=name.toUpperCase(); Runnable r2=() -> System.out.println(name1); r1.run(); } } What is the o/p of the above program? compilation error--correct Which of the following are valid uses of lambda expressions? public void execute(Runnable r){ r.run(); } Execute(() -> {});--correct Which of these interfaces are functional interfaces? public interface Cards{ int totalCount(int a, int b); }--correct [Show More]

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