Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 321:

  Given the code fragment:

  

  How many lines of text does this program print?

  A. four
  B. one
  C. three
  D. two
  D. two

• Question 322:

  What makes Java dynamic?

  A. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.
  B. The runtime can process machine language sources as well as executables from different language compilers.
  C. The Java compiler uses reflection to test if class methods are supported by resources of a target platform.
  D. The Java compiler preprocesses classes to run on specific target platforms.
  A. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.

• Question 323:

  Given:

  

  What will secure this code from a potential Denial of Service condition?

  A. After Line 4, add indexReader.close().
  B. On Line 3, enclose processData(dataReader) with try with resources.
  C. After Line 3, add dataReader.close().
  D. On Line 1, use try with resources when opening each dataReader.
  E. Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.
  B. On Line 3, enclose processData(dataReader) with try with resources.

• Question 324:

  Given:

  

  Which statement on line 1 enables this code fragment to compile?

  A. Function function = String::toUpperCase;
  B. UnaryOperator function = s > s.toUpperCase();
  C. UnaryOperator function = String::toUpperCase;
  D. Function function = m > m.toUpperCase();
  C. UnaryOperator function = String::toUpperCase;

• Question 325:

  Given:

  

  Which two codes, independently, can be inserted in line to 1 compile?

  A. Abacus aba = (int m, int n) -> { m * n };
  B. Abacus aba = (int e, int f) -> { return e * f; };
  C. Abacus aba = (a, b) -> a * b;
  D. Abacus aba = v, w -> x * y;
  E. Abacus aba = (int i, j) -> ( return i * j; };
  C. Abacus aba = (a, b) -> a * b;
  E. Abacus aba = (int i, j) -> ( return i * j; };

• Question 326:

  Given:

  

  What is the output?

  A. :APPLE:ORANGE:BANANA appleorangebanana
  B. :APPLE:ORANGE:BANANA
  C. APPLE:apple ORANGE:orange BANANA:banana
  D. appleorangebanana :APPLE:ORANGE:BANANA
  E. apple:APPLE orange:ORANGE banana:BANANA
  E. apple:APPLE orange:ORANGE banana:BANANA

• Question 327:

  Given:

  

  Which statement on line 1 enables this code to compile?

  A. Supplier function = () -> states.contains("N");
  B. Function function = s -> s.contains(`N");
  C. Consumer function = s -> {if(s.contains("N")) states.remove(s);};
  D. Predicate function = s -> s.contains("N");
  D. Predicate function = s -> s.contains("N");

• Question 328:

  Which two expressions create a valid Java Path instance? (Choose two.)

  A. Paths.get("foo")
  B. Paths.getPath("too")
  C. Path.get(new URI("file:///domains/oracle/test.txt"))
  D. new Path("foo")
  E. Paths.get(URL.create("file:///domains/oracle/test.txt"))
  A. Paths.get("foo")
  E. Paths.get(URL.create("file:///domains/oracle/test.txt"))

• Question 329:

  Given the declaration:

  

  In which two locations is it legal to apply the @Resource annotation? (Choose two.)

  A. Loc3
  B. Loc5
  C. Loc1
  D. Loc4
  E. Loc2
  C. Loc1
  D. Loc4

• Question 330:

  Given the declaration:

  

  Examine this code fragment:

  /* Loc1 */ class ProcessOrders { ... }

  Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)

  A. @Resource({"Customer1", "Customer2"})
  B. @Resource(value={{}})
  C. @Resource
  D. @Resource("Customer1")
  E. @Resource()
  A. @Resource({"Customer1", "Customer2"})
  D. @Resource("Customer1")