Oracle 1z0-808 Bundle 2021
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NEW QUESTION 1
Given:
Which code fragment can replace the if block?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: D
NEW QUESTION 2
Which three statements describe the object-oriented features of the Java language? (Choose three.)
- A. Objects cannot be reused.
- B. A subclass must override the methods from a superclass.
- C. Objects can share behaviors with other objects.
- D. A package must contain a main class.
- E. Object is the root class of all other objects.
- F. A main method must be declared in every class.
Answer: BCF
NEW QUESTION 3
Which two statements are true? (Choose two.)
- 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: BC
NEW QUESTION 4
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
NEW QUESTION 5
Which three statements are true about exception handling? (Choose three.)
- A. Only unchecked exceptions can be rethrown.
- B. All subclasses of the RuntimeException class are not 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 RuntimeException class are unchecked exceptions.
- F. All subclasses of the Error class are not recoverable.
Answer: BCD
NEW QUESTION 6
Given the content of three files:
Which statement is true?
- A. Only the A.Java file compiles successfully.
- B. Only the B.java file compiles successfully.
- C. Only the C.java file compiles successfully.
- D. The A.Java and B.java files compile successfully.
- E. The B.java and C.java files compile successfully.
- F. The A.Java and C.java files compile successfully.
Answer: A
NEW QUESTION 7
Given the code fragment:
What is the result?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
- E. Option E
Answer: E
Explanation: 
NEW QUESTION 8
Given the code fragment:
Which two modifications, when made independently, enable the code to print Joe:true: 100.0? (Choose two.)
- A. Option A
- B. Option B
- C. Option C
- D. Option D
- E. Option E
Answer: AC
NEW QUESTION 9
Given the code fragment:
What is the result?
- A. 2012-02-10
- B. 2012-02-11
- C. Compilation fails
- D. A DateTimeException is thrown at runtime.
Answer: D
NEW QUESTION 10
Given:
What is the result?
- A. Welcome Visit Count:0Welcome Visit Count: 1
- B. Compilation fails at line n2.
- C. Compilation fails at line n1.
- D. Welcome Visit Count:0Welcome Visit Count: 0
Answer: C
Explanation: 
NEW QUESTION 11
Which two class definitions fail to compile? (Choose two.)
- A. Option A
- B. Option B
- C. Option C
- D. Option D
- E. Option E
Answer: CD
NEW QUESTION 12
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
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 13
Given the following main method:
What is the result?
- A. 5 4 3 2 1 0
- B. 5 4 3 2 1
- C. 4 2 1
- D. 5
- E. Nothing is printed
Answer: D
NEW QUESTION 14
Given:
What is the result?
- A. Compilation fails.
- B. false true
- C. true false
- D. true true
- E. false false
Answer: B
NEW QUESTION 15
Given the code fragment:
What is the result?
- A. An exception is thrown at runtime.
- B. -1
- C. 5
- D. 10
Answer: A
NEW QUESTION 16
Which two are benefits of polymorphism? (Choose two.)
- 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: BD
NEW QUESTION 17
Given:
What is the result?
- A. AB
- B. AC
- C. CC
- D. A ClassCastException is thrown only at line n1.
- E. A ClassCastException is thrown only at line n2.
Answer: B
NEW QUESTION 18
Given the code fragment:
What is the result?
- A. Compilation fails.
- B. Hi removed
- C. An UnsupportedOperationException is thrown at runtime.
- D. The program compiles, but it prints nothing.
Answer: A
NEW QUESTION 19
Given the code fragment:
What is the result?
- A. Match 1
- B. Match 2
- C. No Match
- D. A NullPointerException is thrown at runtime.
Answer: A
NEW QUESTION 20
Given the code fragment:
What is the result?
- A. Sum is 600
- B. Compilation fails at line n1.
- C. Compilation fails at line n2.
- D. A ClassCastException is thrown at line n1.
- E. A ClassCastException is thrown at line n2.
Answer: C
NEW QUESTION 21
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