1z1-830 試験問題を無料オンラインアクセス

Given:
java
String s = " ";
System.out.print("[" + s.strip());
s = " hello ";
System.out.print("," + s.strip());
s = "h i ";
System.out.print("," + s.strip() + "]");
What is printed?

• A.[,hello,h i]
• B.[ ,hello,h i]
• C.[,hello,hi]
• D.[ , hello ,hi ]

Given:
java
var frenchCities = new TreeSet<String>();
frenchCities.add("Paris");
frenchCities.add("Marseille");
frenchCities.add("Lyon");
frenchCities.add("Lille");
frenchCities.add("Toulouse");
System.out.println(frenchCities.headSet("Marseille"));
What will be printed?

• A.Compilation fails
• B.[Lyon, Lille, Toulouse]
• C.[Lille, Lyon]
• D.[Paris, Toulouse]
• E.[Paris]

What do the following print?
java
public class Main {
int instanceVar = staticVar;
static int staticVar = 666;
public static void main(String args[]) {
System.out.printf("%d %d", new Main().instanceVar, staticVar);
}
static {
staticVar = 42;
}
}

• A.Compilation fails
• B.666 42
• C.666 666
• D.42 42

What do the following print?
java
import java.time.Duration;
public class DividedDuration {
public static void main(String[] args) {
var day = Duration.ofDays(2);
System.out.print(day.dividedBy(8));
}
}

• A.Compilation fails
• B.PT0D
• C.PT0H
• D.It throws an exception
• E.PT6H

Given:
java
StringBuffer us = new StringBuffer("US");
StringBuffer uk = new StringBuffer("UK");
Stream<StringBuffer> stream = Stream.of(us, uk);
String output = stream.collect(Collectors.joining("-", "=", ""));
System.out.println(output);
What is the given code fragment's output?

• A.-US=UK
• B.=US-UK
• C.An exception is thrown.
• D.US=UK
• E.US-UK
• F.Compilation fails.