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Oracle 1z0-809 (Java SE 8 Programmer II) exam is designed for experienced Java developers who want to validate their skills and knowledge in Java programming. It is a professional-level certification that demonstrates your advanced knowledge of Java SE 8 programming language. 1z1-809 exam covers a wide range of topics related to Java programming, including advanced Java concepts, concurrency, IO, and security.
Oracle 1z0-809 (Java SE 8 Programmer II) exam is designed to test the skills and knowledge of experienced Java developers who have already passed the Oracle 1z0-808 exam. Java SE 8 Programmer II certification exam is intended for developers who have a solid understanding of the Java programming language, its syntax, and its core features.
NEW QUESTION # 125
Given:
Your design requires that:
* fuelLevel of Engine must be greater than zero when the start() method is invoked.
* The code must terminate if fuelLevel of Engine is less than or equal to zero.
Which code fragment should be added at line n1 to express this invariant condition?
- A. assert (fuelLevel > 0) : System.out.println ("Impossible fuel");
- B. assert (fuelLevel) : "Terminating...";
- C. assert fuelLevel < 0: System.exit(0);
- D. assert fuelLevel > 0: "Impossible fuel" ;
Answer: C
NEW QUESTION # 126
Given the code fragment:
What is the result?
- A. David
Allen
[Susan] - B. Susan
Susan
[Susan, Allen] - C. David
David
[Susan, Allen] - D. Susan
Allen
[David] - E. Susan
Allen
[Susan, David]
Answer: D
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION # 127
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs because the try block doesn't have a catch or finally block.
- B. A compilation error occurs at line n1.
- C. A compilation error occurs at line n2.
- D. The program compiles successfully.
Answer: A
NEW QUESTION # 128
Given:
And given the code fragment:
- A. 4W 100 Auto
4W 150 Manual - B. Compilation fails at both line n1 and line n2.
- C. Compilation fails only at line n1.
- D. Compilation fails only at line n2.
- E. null 0 Auto
4W 150 Manual
Answer: B
Explanation:
line 1 : Car extends Vehicle, before the Car constructor is called the super constructor must be called. There is no default constructor in the Vehicle class line 2 : after calling "super (type, maxSpeed)" you cannot call this, you can either call "super" or
"this" but not both of them
NEW QUESTION # 129
Given the code fragment:
What is the result?
- A. Logged out at: 2015-01-12T21:58:00Z
- B. Can't logout
- C. A compilation error occurs at line n1.
- D. Logged out at: 2015-01-12T21:58:19.880Z
Answer: A
NEW QUESTION # 130
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 131
Given:
What is the result?
- A. An exception is thrown at runtime
- B. Initialized Started Initialized
- C. Initialized Started
- D. Compilation fails
Answer: B
NEW QUESTION # 132
Given the code fragments :
and
What is the result?
- A. TV Price :110 Refrigerator Price :2100
- B. TV Price :1000 Refrigerator Price :2000
- C. A compilation error occurs.
- D. The program prints nothing.
Answer: A
NEW QUESTION # 133
Given the code fragment:
List<Double> doubles = Arrays.asList (100.12, 200.32);
DoubleFunction funD = d -> d + 100.0;
doubles.stream (). forEach (funD); // line n1
doubles.stream(). forEach(e -> System.out.println(e)); // line n2
What is the result?
- A. A compilation error occurs at line n1.
- B. 200.12
300.32 - C. 100.12
200.32 - D. A compilation error occurs at line n2.
Answer: D
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION # 134
What is true about the java.sql.Statement interface?
- A. It is used to get an instance of a Connection object by using JDBC drivers.
- B. It provides a session with the database.
- C. It provides a cursor to fetch the resulting data.
- D. It provides a class for executing SQL statements and returning the results.
Answer: D
Explanation:
References:
NEW QUESTION # 135
Given:
- A. A ClassCastException is thrown at runtime
- B. Ym Xm2
- C. Compilation fails
- D. Ym Xm1
Answer: D
NEW QUESTION # 136
Given the code fragments:
class Employee {
Optional<Address> address;
Employee (Optional<Address> address) {
this.address = address;
}
public Optional<Address> getAddress() { return address; }
}
class Address {
String city = "New York";
public String getCity { return city: }
public String toString() {
return city;
}
}
and
Address address = null;
Optional<Address> addrs1 = Optional.ofNullable (address);
Employee e1 = new Employee (addrs1);
String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : "City Not
available";
What is the result?
- A. null
- B. New York
- C. City Not available
- D. A NoSuchElementException is thrown at run time.
Answer: A
NEW QUESTION # 137
Given the code fragments:
class Employee {
Optional<Address> address;
Employee (Optional<Address> address) {
this.address = address;
}
public Optional<Address> getAddress() { return address; }
}
class Address {
String city = "New York";
public String getCity { return city: }
public String toString() {
return city;
}
}
and
Address address = null;
Optional<Address> addrs1 = Optional.ofNullable (address);
Employee e1 = new Employee (addrs1);
String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : "City Not available";
What is the result?
- A. null
- B. New York
- C. City Not available
- D. A NoSuchElementException is thrown at run time.
Answer: A
NEW QUESTION # 138
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs.
- B. Java EE
Java ME - C. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
[Java EE: Helen:Houston] - D. [Java EE: Helen:Houston]
[Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
Answer: A
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION # 139
Given:
public class Foo<K, V> {
private K key;
private V value;
public Foo (K key, V value) (this.key = key; this value = value;)
public static <T> Foo<T, T> twice (T value) (return new Foo<T, T> (value, value); )
public K getKey () (return key;)
public V getValue () (return value;)
}
Which option fails?
- A. Foo<String, String> pair = Foo.<String>twice ("Hello World!");
- B. Foo<String, Integer> mark = new Foo<String, Integer> ("Steve", 100););
- C. Foo<String, String> grade = new Foo <> ("John", "A");
- D. Foo<?, ?> percentage = new Foo <> (97, 32););
Answer: D
NEW QUESTION # 140
The protected modifier on a Field declaration within a public class means that the field ______________.
- A. Can be read and written from this class and its subclasses defined in any package
- B. Cannot be modified
- C. Can be read but not written from outside the class
- D. Can be read and written from this class and its subclasses only within the same package
Answer: A
Explanation:
Reference:
http://beginnersbook.com/2013/05/java-access-modifiers/
NEW QUESTION # 141
Given:
From what threading problem does the program suffer?
- A. starvation
- B. race condition
- C. livelock
- D. deadlock
Answer: D
NEW QUESTION # 142
......
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