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2021 Oct 1Z0-850 practice exam
Q131. - (Topic 1)
Which two are represented in a UML class diagram? (Choose two.)
A. relationships between classes and interfaces
B. ways to test an application
C. the interactions between objects in sequential order
D. operations of classes and interfaces
Answer: A,D
Q132. - (Topic 1)
Which is a valid definition of an interface called Transportable given another valid interface, Movable?
A. class Movable extends Transportable { /*...*/ }
B. interface Transportable extends Movable { /*...*/ }
C. class Movable implements Transportable { /*...*/ }
D. interface Transportable implements Movable { /*...*/ }
Answer: B
Q133. - (Topic 2)
Click the Exhibit button.
Which code correctly implements the association between A and B?
A. class A { }
class B {
private A[] a;
}
B. class A { }
class B {
private A a;
}
C. class A {
private B b;
}
class B {
private A[] a;
}
D. class A {
private B[] b;
}
class B {
private A a;
}
E. class A {
private B b;
}
class B { }
F. class A {
private B[] b;
}
class B { }
Answer: F
Q134. - (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
Q135. - (Topic 2)
Click the Exhibit button. Which two are true? (Choose two.)
A. Every Dippy must be associated with at least one Zippy.
B. Every Dippy must be associated with exactly one Zippy.
C. It is valid for a Zippy to be associated with more than one Dippy.
D. It is valid for a Zippy to have no associated Dippy.
E. Every Zippy must be associated with exactly one Dippy.
F. It is valid for a Dippy to have no associated Zippy.
Answer: A,D
Regenerate 1Z0-850 test engine:
Q136. - (Topic 2)
Which three are char literals? (Choose three.)
A. 'C'
B. "C"
C. 'ABC'
D. 'uF00D'
E. 'n'
F. /C/
Answer: A,D,E
Q137. - (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
Q138. - (Topic 2)
Which three are true? (Choose three.)
A. If abstract class B directly extends abstract class A, class B must implement all abstract methods declared in A.
B. An abstract class CANNOT be instantiated.
C. An interface can extend multiple interfaces.
D. All methods in an abstract class must be abstract.
E. If concrete class C extends concrete class B, and B implements interface A, then all methods from interface A can be invoked on an instance of C.
Answer: B,C,E
Q139. - (Topic 1)
Which four are legal declarations? (Choose four.)
A. String st = null;
B. String st = "Hello";
C. String st == 'Hello'
D. String st = 'Hello'
E. String st == "Hello";
F. String[] st = new String[1];
G. String st = new String("Hello");
Answer: A,B,F,G
Q140. - (Topic 2)
Which four are primitive data types? (Choose four.)
A. Integer
B. String
C. short
D. long
E. null
F. int
G. char
Answer: C,D,F,G