Oracle Java and Middleware 1Z0-808 practice exam | Certpark

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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 two statements are true? 
A. Error class is unextendable. 
B. Error class is extendable. 
C. Error is a RuntimeException. 
D. Error is an Exception. 
E. Error is a Throwable. 
Answer: B,C

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 three are advantages of the Java exception mechanism? 
A. Improves the program structure because the error handling code is separated from the normal program function 
B. Provides a set of standard exceptions that covers all the possible errors 
C. Improves the program structure because the programmer can choose where to handle exceptions 
D. Improves the program structure because exceptions must be handled in the method in which they occurred 
E. Allows the creation of new exceptions that are tailored to the particular program being created 
Answer: A,C,D

Which three statements are true about exception handling? 
A. Only unchecked exceptions can be rethrown. 
B. All subclasses of the RuntimeException class are recoverable. 
C. The parameter in a catch block is of Throwable type. 
D. All subclasses of the RuntimeException class must be caught or declared to be thrown. 
E. All subclasses of the Exception class except the RuntimeException class are checked exceptions. 
F. All subclasses of the Error class are checked exceptions and are recoverable. 
Answer: C,E,F

Which two class definitions fail to compile? 
A. abstract class A3 {private static int i;public void doStuff(){}public A3(){}} 
B. final class A1 {public A1(){}} 
C. public class A2 {private static int i;private A2(){}} 
D. class A4 {protected static final int i;private void doStuff(){}} 
E. final abstract class A5 {protected static int i;void doStuff(){}abstract void doIt();} 
Answer: C,E

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