Java and Middleware 1z0-808 Practice Test Engine Try These 225 Exam Questions [Q16-Q33]

Java and Middleware 1z0-808 Practice Test Engine: Try These 225 Exam Questions

Guaranteed Success in Java and Middleware 1z0-808 Exam Dumps

NEW QUESTION # 16
Which two are benefits of polymorphism?

A. More efficient code at runtime
B. More flexible and reusable code
C. Code that is protected from extension by other classes
D. Faster code at runtime
E. More dynamic code at runtime

Answer: A,B

Explanation:
Reference:https://www.cs.princeton.edu/courses/archive/fall98/cs441/mainus/node5.html

NEW QUESTION # 17
Given the code fragments:

Which modification enables the code to compile?
A:

B:

C:

D:

A. Option D
B. Option A
C. Option B
D. Option C

Answer: D

NEW QUESTION # 18
You are asked to develop a program for a shopping application, and you are given the following information:
The application must contain the classes Toy, EduToy, and ConsToy. The Toy class is the superclass

of the other two classes.
The int caicuiatePrice (Toy t) method calculates the price of a toy.

The void printToy (Toy t) method prints the details of a toy.

Which definition of the Toy class adds a valid layer of abstraction to the class hierarchy?

A. Option C
B. Option D
C. Option A
D. Option B

Answer: C

NEW QUESTION # 19
Given the code fragment:

What is the result?

A. true true
B. false false
C. false true
D. true false

Answer: B

NEW QUESTION # 20
Given:

And given the commands:
javac Test.Java
Java Test Hello
What is the result?

A. Success
B. Compilation fails.
C. Failure
D. An exception is thrown at runtime

Answer: C

NEW QUESTION # 21
Class StaticField {
static int i = 7;
public static void main(String[] args) {
StaticFied obj = new StaticField();
obj.i++;
StaticField.i++;
obj.i++;
System.out.println(StaticField.i + " "+ obj.i); } }
What is the result?

A. 8 9
B. 9 8
C. 7 10
D. 10 10

Answer: D

NEW QUESTION # 22
Given the code fragment:

What is the result?

A. A ClassCastException is thrown at line n1.
B. Compilation fails at line n1.
C. Compilation fails at line n2.
D. Sum is 600
E. A ClassCastException is thrown at line n2.

Answer: C

Explanation:
Explanation/Reference:

NEW QUESTION # 23
Given:

And given the code fragment:
Book book1 = new EBook();
book1.readBook();
Which option enables the code to compile?

A. Option C
B. Option D
C. Option A
D. Option B

Answer: B

NEW QUESTION # 24
Given the code fragment:

Which option represents the state of the num array after successful completion of the outer loop?

A. Option C
B. Option D
C. Option B
D. Option A

Answer: C

NEW QUESTION # 25
Given the code fragment:

Which two code fragments can be independently inserted at line n1 to enable the code to print the elements of the array in reverse order?

A. while (x > 0) {System.out.print(array[--x]);}
B. do {System.out.print(array[x]);--x;} while (x >= 0);
C. do {x--;System.out.print(array[x]);} while (x >= 0);
D. while (x > 0) {x--;System.out.print(array[x]);}
E. while (x >= 0) {System.out.print(array[x]);x--;}

Answer: A,C

NEW QUESTION # 26
Which statement is true about Java byte code?

A. It can run on any platform.
B. It can run on any platform only if it was compiled for that platform.
C. It can run on any platform that has a Java compiler.
D. It can run on any platform that has the Java Runtime Environment.
E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.

Answer: C

Explanation:
Explanation/Reference:
Reference: http://www.math.uni-hamburg.de/doc/java/tutorial/getStarted/intro/definition.html Explanation:
Java bytecodes help make "write once, run anywhere" possible. You can compile your program into bytecodes on any platform that has a Java compiler. The bytecodes can then be run on any implementation of the Java VM. That means that as long as a computer has a Java VM, the same program written in the Java programming language can run on Windows 2000, a Solaris workstation, or on an iMac.

NEW QUESTION # 27
Given the code fragment:

What is the result if the integer aVar is 9?

A. Compilation fails.
B. Hello Universe!
C. Hello World!
D. 10 Hello World!

Answer: D

NEW QUESTION # 28
Given the code fragment:

Which two code fragments can be independently inserted at line n1 to enable the code to print the elements of the array in reverse order? (Choose two.)

Answer: B,D

NEW QUESTION # 29
Which two code fragments cause compilation errors? (Choose two.)

A. int y2 = 100;
float fit = (float) y2;
B. Float fit = 100.00;
C. float fit = (float) 1_11.00;
D. double y1 = 203.22; float fit = y1;
E. float fit = 100.00F;

Answer: B,D

NEW QUESTION # 30
Which is a valid abstract class?

A. public abstract class Car {
protected final void accelerate();
}
B. public interface Car {
protected abstract void accelerate();
}
C. public abstract class Car {
protected void accelerate();
}
D. public abstract class Car {
protected abstract void accelerate() {
//more car can do
}}
E. public abstract class Car {
protected abstract void accelerate();
}

Answer: E

NEW QUESTION # 31
Given:

What is the result?

A. 100 Hello 121
B. 10 Hello 11
C. 100 Hello Hello 121
D. 10 Hello Hello 121
E. 10 Hello Hello 11

Answer: B

NEW QUESTION # 32
Given:

And given the code fragment:

Which two modifications enable the code to print the following output? (Choose two.) Canine 60 Long Feline 80 Short
. Replace line n1 with: