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2021 Dec 1Z0-850 practice
Q21. - (Topic 1)
Given:
1.
class Test {
2.
public static void main(String args[]) {
3.
int num1 = 10, num2 = 20, result;
4.
result = calc(num1, num2);
5.
System.out.println(result);
6.
}
7.
8.
// insert code here
9.
}
Which, inserted at line 8, produces the output 30?
A. static int calc(int n1, int n2) { return n1 + n2; }
B. static void calc(n1, n2) { return (n1 + n2); }
C. public int calc(int n1, int n2) { return; }
D. static int calc(int n1, int n2) { return; }
E. public int calc(int n1, int n2) { return n1 + n2; }
F. static int calc(int n1, n2) { return n1, n2; };
Answer: A
Q22. - (Topic 2)
Which type of primitive can be assigned a new value within a conditional expression?
A. boolean
B. int
C. short
D. char
E. byte
Answer: A
Q23. - (Topic 2)
Given: 1. public class Foo { 2. public static void main() { 3. System.out.println("Hello."); 4. }
5. } Which is true?
A. The class Foo will run successfully when invoked with the command line: java Foo, but will produce no output.
B. Compilation fails.
C. An exception occurs at runtime when class Foo is invoked with the command line java Foo.
D. The class Foo will run successfully when invoked with the command line java Foo, and will print "Hello."
Answer: C
Q24. - (Topic 2)
Click the Exhibit button. Which two are true? (Choose two.)
A. Every Flurb is associated with exactly one Flurb.
B. There can only be one instance of the Flurb class.
C. Every Flurb contains a reference to itself.
D. There must always be an even number of Flurb instances.
E. A Flurb can be associated with itself, but it also could be associated with a different Flurb.
Answer: A,E
Q25. - (Topic 1)
A Java programmer wants to develop a small application to run on mobile phones. Which Java edition (or editions) are required to develop the application?
A. only J2ME
B. J2SE and J2EE
C. only J2EE
D. J2SE and J2ME
E. only J2SE
F. J2EE and J2ME
Answer: D
Rebirth 1Z0-850 exam question:
Q26. - (Topic 1)
Given:
4.
int n1 = 22, n2 = 67, n3 = 0, n4 = 47, n5 = 17, n6 = 50;
5.
boolean b = true;
Which three evaluate to true? (Choose three.)
A. !(n1 < n3) && (n5 != n4)
B. (n3 < n5) || (n2 <= n1)
C. (n2 > n6) || b
D. (!b) && (n1 <= n4)
E. (n2 < n6) && (n4 >= n1)
Answer: A,B,C
Q27. - (Topic 2)
Click the Exhibit button.
Which attribute CANNOT be accessed from a Mountain object?
A. view
B. name
C. climb
D. height
Answer: D
Q28. - (Topic 2)
Which is true about Java RMI?
A. rmiregistry provides a lookup service.
B. RMI is the acronym for Remote Method Interchange.
C. An HTTP server is necessary to use RMI.
D. RMI uses the SOAP protocol.
Answer: A
Q29. - (Topic 1)
Given:
13.
class Stone {
14.
String color = "white";
15.
}
16.
17.
public class ManyStones {
18.
Stone[] stones = {new Stone(), new Stone(), new Stone()};
19.
}
Which is true?
A. Compilation fails.
B. The class ManyStones has a color attribute.
C. The class Stone has a relationship to a ManyStones object.
D. The class ManyStones CANNOT have access to multiple class Stone objects.
E. The class ManyStones has a relationship to three Stone objects.
Answer: E
Q30. - (Topic 1)
Which two are associated with the business tier in a J2EE web-based application? (Choose two.)
A. stateless session beans
B. servlets
C. JSP
D. HTML
E. entity beans
Answer: A,E