[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6},"actionData","errors","routes/interviewPrep/PrepQuestionRoute",{"_7":8,"_9":10},"key","/interview-prep/q/java-which-are-functional-interfaces","prep",{"_11":12,"_13":14},"item",{"_15":16,"_17":18,"_19":20,"_21":22,"_23":24,"_25":26,"_27":28,"_29":30,"_31":32,"_33":34,"_35":36,"_37":38,"_39":40,"_41":42,"_43":44,"_45":46,"_47":48},"duplicateTitle",false,"id","java-which-are-functional-interfaces","stage","language","topic","lang-functional","order",10,"type","quiz","title","Which are functional interfaces?","difficulty","Easy","langs",[49],"seoDescription","Java quiz on functional interfaces: which of Runnable, Comparator, Predicate and List can be the target of a lambda, and the one-abstract-method rule.","askedIn",[81,82,83],"prompt","

A lambda (a short function without a name, such as x -> x + 1) can be assigned to a functional interface, which is an interface with exactly one abstract method. Which of these are functional interfaces? Pick all that apply.

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