
Tutorium 7 - Prog2
Authored by Loris Galler
Computers
University
Used 2+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Die Methodenreferenz von x -> Math.abs(x) ist Math::abs
Stimmt
Falsch!
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was ist der Lambda-Ausdruck von ArrayList<String>::new
() -> new ArrayList<String>
(String s) -> new ArrayList<>()
(Sting s) -> new ArrayList<String>(s)
(s) -> new ArrayList(String s)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Welche Methode verwendet man bei Streams, um Elemente in eine finale Form zu sammeln?
.map()
.filter()
.collect()
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche Collectors-Methode entfernt Duplikate, indem sie die Elemente in ein Set sammelt?
.toList()
.joining()
.toSet()
.groupingBy()
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was ist die Ausgabe dieses Codes?
{true=[Hey], false=[Was geht, JOJOJO]}
{false=[Hey, Was geht], true=[JOJOJO]}
{false=[Was geht, JOJOJO], true=[Hey]}
{false=[Hey], true=[Was geht, JOJOJO]}
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was beschreibt am besten einen verschachtelten Stream (nested Stream) in Java?
Ein Stream, der in einer Methode definiert und in einer anderen verwendet wird.
Ein Stream, der innerhalb eines anderen Streams verwendet wird, um eine tiefere Verarbeitungsschicht zu erreichen.
Ein Stream, der zur Sammlung von Daten in einer Datenbank verwendet wird.
Ein Stream, der nur für die Verarbeitung von Dateisystemen geeignet ist.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Wie würdest du eine Liste von Listen in Java in eine einzige flache Liste transformieren?
map, um die Listen zu transformieren, und collect, um die Ergebnisse zu sammeln.
flatMap, um die Listen zu flachen, und collect, um die Ergebnisse zu sammeln.
filter, um die Listen zu flachen, und collect, um die Ergebnisse zu sammeln.
sorted, um die Listen zu flachen, und collect, um die Ergebnisse zu sammeln.
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