Oracle 1Z0-808 Online Practice Questions and Exam Preparation

Oracle 1Z0-808 Online Questions & Answers

• Question 161:

  Given:

  

  Which action fixes the compiler error?

  A. At line 17, add throws AccessViolationException
  B. At line 13, add throws LogFileException
  C. At line 2, replace throws LogFileExceptionwith throws AccessViolationException
  D. At line 7, insert throw new LogFileException ();
  B. At line 13, add throws LogFileException

  ---

  Explanation/Reference:

  The correct answer is B, in cases of EXCEPTIONS you need to declare in the constructor "throws LogFileException". In the case of a RuntimeException you don't need to.

• Question 162:

  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.
  B. Error class is extendable.
  E. Error is a Throwable.

  ---

  Explanation/Reference:

• Question 163:

  Given the code fragment:

  

  What is the result?

  A. 5 : 5
  B. 10 : 10
  C. 5 : 10
  D. Compilation fails.
  B. 10 : 10

  ---

  Explanation/Reference:

• Question 164:

  Given:

  

  What is the result?

  A. 120
  B. 120D
  C. A NumberFormatException will be thrown.
  D. Compilation fails due to error at line 5.
  E. Compilation tails due to error at line 8.
  E. Compilation tails due to error at line 8.

  ---

  Explanation/Reference:

  At line 5, we have created a wrapper object of double by passing 120D, which is convertible to a Double, so there won't be any exception there. But if you check carefully, you can see the variable number is declared inside try block, so the scope of the variable number is limited to that block, so trying to access it outside causes a compile time error. httpsy/docs.oracle.com/javase/tutorial/iava/nutsandbolts/variables.html

• Question 165:

  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
  D. 5

  ---

  Explanation/Reference:

  Loop will run only once and after that num == 0 will break it After first cycle of the loop.

• Question 166:

  Given the following classes: Which two options fail to compile when placed at line n1 of the main method?

  

  A. employee.salary = 50_000;
  B. director.salary = 80_000;
  C. employee.budget = 200_000;
  D. manager.budget = 1_000_000;
  E. manager.stockOption = 500;
  F. director.stockOptions = 1_000;
  C. employee.budget = 200_000;
  E. manager.stockOption = 500;

• Question 167:

  Given the code fragment:

  

  What is the result?

  A. Execution terminates in the first catch statement, and caught a RuntimeException is printed to the console.
  B. Execution terminates In the second catch statement, and caught an Exception is printed to the console.
  C. A runtime error is thrown in the thread "main".
  D. Execution completes normally, and Ready to us?is printed to the console.
  E. The code fails to compile because a throws keyword is required.
  C. A runtime error is thrown in the thread "main".

• Question 168:

  Which two features can be implemented in a Java application by encapsulating the entity classes used? (Choose two.)

  A. data validation
  B. compile time polymorphism
  C. data hiding
  D. data abstraction
  E. data memory optimization
  C. data hiding
  D. data abstraction

  ---

  Explanation/Reference:

  Reference: https://www.geeksforgeeks.org/encapsulation-in-java/

• Question 169:

  Given the code fragment:

  float x = 22.00f % 3.00f; int y = 22 % 3; System.out.print(x + ", "+ y); What is the result?

  A. 1.0, 1
  B. 1.0f, 1
  C. 7.33, 7
  D. Compilation fails
  E. An exception is thrown at runtime
  A. 1.0, 1

• Question 170:

  Given:

  

  What is the result?

  A. 6 7 8
  B. 7 8 9
  C. 0 1 2
  D. 6 8 10
  E. Compilation fails
  A. 6 7 8