Free Oracle 1z0-830 Exam Dumps Questions & Answers

Given:
java
Deque<Integer> deque = new ArrayDeque<>();
deque.offer(1);
deque.offer(2);
var i1 = deque.peek();
var i2 = deque.poll();
var i3 = deque.peek();
System.out.println(i1 + " " + i2 + " " + i3);
What is the output of the given code fragment?

• A.An exception is thrown.
• B.2 2 1
• C.1 1 2
• D.2 2 2
• E.2 1 2
• F.1 1 1
• G.1 2 1
• H.1 2 2
• I.2 1 1

Which of the following java.io.Console methods doesnotexist?

• A.read()
• B.readPassword()
• C.readPassword(String fmt, Object... args)
• D.readLine()
• E.reader()
• F.readLine(String fmt, Object... args)

Given:
java
var _ = 3;
var $ = 7;
System.out.println(_ + $);
What is printed?

• A.It throws an exception.
• B.Compilation fails.
• C.10
• D._$

Given:
java
public class ExceptionPropagation {
public static void main(String[] args) {
try {
thrower();
System.out.print("Dom Perignon, ");
} catch (Exception e) {
System.out.print("Chablis, ");
} finally {
System.out.print("Saint-Emilion");
}
}
static int thrower() {
try {
int i = 0;
return i / i;
} catch (NumberFormatException e) {
System.out.print("Rose");
return -1;
} finally {
System.out.print("Beaujolais Nouveau, ");
}
}
}
What is printed?

• A.Saint-Emilion
• B.Beaujolais Nouveau, Chablis, Saint-Emilion
• C.Beaujolais Nouveau, Chablis, Dom Perignon, Saint-Emilion
• D.Rose

Given:
java
var ceo = new HashMap<>();
ceo.put("Sundar Pichai", "Google");
ceo.put("Tim Cook", "Apple");
ceo.put("Mark Zuckerberg", "Meta");
ceo.put("Andy Jassy", "Amazon");
Does the code compile?

• A.True
• B.False