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Share some Java and Middleware 1Z0-808 exam questions and answers below.
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 the Java Runtime Environment. 
D. It can run on any platform that has a Java compiler. 
E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler. 
Answer: D

Which statement is true about the switch statement? 
A. It must contain the default section. 
B. The break statement, at the end of each case block, is mandatory. 
C. Its case label literals can be changed at runtime. 
D. Its expression must evaluate to a single value. 
Answer: D

Which statement will empty the contents of a StringBuilder variable named sb? 
A. sb. deleteAll (); 
B. sb. delete (0, sb. size () ); 
C. sb. delete (0, sb. length () ); 
D. sb. removeAll (); 
Answer: C

Which two are benefits of polymorphism? 
A. Faster code at runtime 
B. More efficient code at runtime 
C. More dynamic code at runtime 
D. More flexible and reusable code 
E. Code that is protected from extension by other classes 
Answer: B,D

Which three statements are true about the structure of a Java class? 
A. A public class must have a main method. 
B. A class can have only one private constructor. 
C. A method can have the same name as a field. 
D. A class can have overloaded static methods. 
E. The methods are mandatory components of a class. 
F. The fields need not be initialized before use. 
Answer: A,C,E

Which three statements describe the object-oriented features of the Java language? 
A. Objects cannot be reused. 
B. A subclass can inherit from a superclass. 
C. Objects can share behaviors with other objects. 
D. A package must contain more than one class. 
E. Object is the root class of all other objects. 
F. A main method must be declared in every class. 
Answer: B,C,F

Given the code fragment: 
int[] array = {1, 2, 3, 4, 5}; 
And given the requirements: 
1. Process all the elements of the array in the order of entry. 
2. Process all the elements of the array in the reverse order of entry. 
3. Process alternating elements of the array in the order of entry. 
Which two statements are true? 
A. Requirements 1, 2, and 3 can be implemented by using the enhanced for loop. 
B. Requirements 1, 2, and 3 can be implemented by using the standard for loop. 
C. Requirements 2 and 3 CANNOT be implemented by using the standard for loop. 
D. Requirement 1 can be implemented by using the enhanced for loop. 
E. Requirement 3 CANNOT be implemented by using either the enhanced for loop or the standard for loop. 
Answer: D,E

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