Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 161:

  Which two are successful examples of autoboxing? (Choose two.)

  A. String a = "A";
  B. Integer e = 5;
  C. Float g = Float.valueOf(null);
  D. Double d = 4;
  E. Long c = 23L;
  F. Float f = 6.0;
  A. String a = "A";
  B. Integer e = 5;

• Question 162:

  Given the code fragment:

  

  Which two code snippets inserted independently inside print method print Mondial: domainmodal?

  A. Main.prefix + Main.name
  B. prefix + getName
  C. Main.prefix + Main.getName()
  D. new Main().prefix + new Main().name
  E. prefix + name
  F. prefix + Main.name
  C. Main.prefix + Main.getName()
  D. new Main().prefix + new Main().name

• Question 163:

  Given:

  

  What is the result?

  A. hat at store 1
  B. An IndexOutOfBoundsException is thrown at runtime.
  C. at once 0
  D. hat at store 4
  E. at once 1
  A. hat at store 1

• Question 164:

  Given:

  

  What is the result?

  A. The compilation fails.
  B. two
  C. one
  D. A NurberFormatException is thrown at runtime.
  C. one

• Question 165:

  Given:

  

  What is the output?

  A. Bonjour le monde! Hello world!
  B. Hello world! Bonjour le monde!
  C. Hello world! Hello world!
  D. Bonjour le monde! Bonjour le monde!
  C. Hello world! Hello world!

• Question 166:

  Given: Which statement is equivalent to line 1?

  

  A. double totalSalary = list.stream().map(e > e.getSalary() * ratio).reduce (bo).ifPresent (p > p.doubleValue());
  B. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).sum;
  C. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
  D. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).reduce(starts, bo);
  C. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);

• Question 167:

  Given:

  

  What is the result?

  A. An indexOutofBoundsException is thrown at runtime.
  B. At once 0
  C. Hat at store 4
  D. At once 1
  E. Hat at store 1
  E. Hat at store 1

• Question 168:

  Given the formula to calculate a monthly mortgage payment:

  

  and these declarations:

  

  How can you code the formula?

  A. m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));
  B. m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) - 1));
  C. m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1;
  D. m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1);
  A. m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));

• Question 169:

  Which describes an aspect of Java that contributes to high performance?

  A. Java prioritizes garbage collection.
  B. Java has a library of built-in functions that can be used to enable pipeline burst execution.
  C. Java monitors and optimizes code that is frequently executed.
  D. Java automatically parallelizes code execution.
  C. Java monitors and optimizes code that is frequently executed.

• Question 170:

  Examine: Class.forName(JDBC_DRIVER_CLASS_NAME); When is it necessary to execute this statement?

  A. It must be executed once and only before the first call to DriverManager to get a Connection using the named JDBC driver.
  B. It is no longer required to execute this method.
  C. It must be executed before each call to DriverManager to get a Connection using the named JDBC driver.
  D. It must be executed once and before accessing the named JDBC driver in any way.
  B. It is no longer required to execute this method.