1z0-809 Dumps 2021 - New Oracle 1z0-809 Exam Questions
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NEW QUESTION 27
Given the code fragment:
Assume that dbURL, userName, and password are valid.
Which code fragment can be inserted at line n1 to enable the code to print Connection Established?
- A. Properties prop = new Properties();
prop.put ("user", userName);
prop.put ("password", password);
con = DriverManager.getConnection (dbURL, prop); - B. con = DriverManager.getConnection (userName, password, dbURL);
- C. Properties prop = new Properties();
prop.put ("userid", userName);
prop.put ("password", password);
prop.put("url", dbURL);
con = DriverManager.getConnection (prop); - D. con = DriverManager.getConnection (dbURL);
con.setClientInfo ("user", userName);
con.setClientInfo ("password", password);
Answer: A
NEW QUESTION 28
Given the code snippet from a compiled Java source file:
Which command-line arguments should you pass to the program to obtain the following output?
Arg is 2
- A. java MyFile 1 2 2 3 4
- B. java MyFile 1 3 2 2
- C. java MyFile 2 1 2
- D. java MyFile 0 1 2 3
Answer: B
NEW QUESTION 29
Given:
final class Folder {//line n1
//line n2
public void open () {
System.out.print("Open");
}
}
public class Test {
public static void main (String [] args) throws Exception {
try (Folder f = new Folder()) {
f.open();
}
}
}
Which two modifications enable the code to print Open Close? (Choose two.)
- A. Replace line n1 with:class Folder extends Exception {
- B. At line n2, insert:public void close () throws IOException {System.out.print("Close");}
- C. Replace line n1 with:class Folder implements AutoCloseable {
- D. Replace line n1 with:class Folder extends Closeable {
- E. At line n2, insert:final void close () {System.out.print("Close");}
Answer: B,C
NEW QUESTION 30
Given:
Your design requires that:
fuelLevel of Engine must be greater than zero when the start()method is invoked.
The code must terminate if fuelLevelof Engineis less than or equal to zero.
Which code fragment should be added at line n1to express this invariant condition?
- A. assert fuelLevel < 0: System.exit(0);
- B. assert (fuelLevel > 0) : System.out.println ("Impossible fuel");
- C. assert fuelLevel > 0: "Impossible fuel" ;
- D. assert (fuelLevel) : "Terminating...";
Answer: A
NEW QUESTION 31
Given:
What is the result?
- A. Hello Log 1:0
- B. Welcome Log 2:1
- C. Hello Log 2:1
- D. Welcome Log 1:0
Answer: B
NEW QUESTION 32
Given the code fragment:
What is the result?
- A. null
- B. [Java, J2EE, J2ME, JSTL, JSP]
- C. [Java, J2EE, J2ME, JSTL]
- D. A compilation error occurs.
Answer: C
NEW QUESTION 33
Given the code fragment:
What is the result?
- A. Logged out at: 2015-01-12T21:58:19.880Z
- B. A compilation error occurs at line n1.
- C. Logged out at: 2015-01-12T21:58:00Z
- D. Can't logout
Answer: C
NEW QUESTION 34
Given: What is the result?
- A. Compilation fails due to an error in line n1
- B. Compilation fails due to an error at line n3
- C. Compilation fails due to an error at line n2
- D. 100 210
Answer: C
NEW QUESTION 35
Given:
public class product {
int id; int price;
public Product (int id, int price) {
this.id = id;
this.price = price;
}
public String toString() { return id + ":" + price; }
}
and the code fragment:
List<Product> products = Arrays.asList(new Product(1, 10),
new Product (2, 30),
new Product (2, 30));
Product p = products.stream().reduce(new Product (4, 0), (p1, p2) -> {
p1.price+=p2.price;
return new Product (p1.id, p1.price);});
products.add(p);
products.stream().parallel()
.reduce((p1, p2) - > p1.price > p2.price ? p1 : p2)
.ifPresent(System.out: :println);
What is the result?
- A. 2 : 30
- B. 4 : 0
- C. 4 : 70
- D. 4 : 602 : 303 : 201 : 10
- E. The program prints nothing.
Answer: C
NEW QUESTION 36
Given:
What is the result?
- A. -finally--catch-
- B. -finally-dostuff--catch-
- C. -catch--finally--dostuff-
- D. -catch-
Answer: A
Explanation:
NEW QUESTION 37
Given the code fragment:
Stream<Path> files = Files.walk(Paths.get(System.getProperty("user.home"))); files.forEach (fName -> {//line n1 try { Path aPath = fName.toAbsolutePath();//line n2 System.out.println(fName + ":"
+ Files.readAttributes(aPath, Basic.File.Attributes.class).creationTime ());
} catch (IOException ex) {
ex.printStackTrace();
});
What is the result?
- A. All files and directories under the home directory are listed along with their attributes.
- B. A compilation error occurs at line n2.
- C. A compilation error occurs at line n1.
- D. The files in the home directory are listed along with their attributes.
Answer: A
NEW QUESTION 38 
What is the result?
- A. 0
- B. A compilation error occurs at line 7.
- C. A compilation error occurs at line 8.
- D. A compilation error occurs at line 15.
Answer: B
NEW QUESTION 39
Given the code fragment
Which code fragments, inserted independently, enable the code compile?
- A. t.fvar = 200;
- B. cvar = 400;
- C. fvar = 200;
cvar = 400; - D. t.fvar = 200;
Test2.cvar = 400; - E. this.fvar = 200;
Test2.cvar = 400; - F. this.fvar = 200;
this.cvar = 400;
Answer: B
NEW QUESTION 40
Given:
What is the result?
- A. 10 : 22 : 20
- B. 10 : 22 : 6
- C. 10 : 30 : 6
- D. 10 : 22 : 22
Answer: B
NEW QUESTION 41
Given the code fragment:
Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWord exists The Employee table has a column ID of type integer and the SQL query matches one record.
What is the result?
- A. Compilation fails at line 15.
- B. Compilation fails at line 14.
- C. The code prints the employee ID.
- D. The code prints Error.
Answer: B
NEW QUESTION 42
Given:
What is the result?
- A. 2 4 6 8 9
- B. 1 3 5 7 9
- C. 2 4 6 8
- D. 1 3 5 7
Answer: B
NEW QUESTION 43
Given:
class Bird {
public void fly () { System.out.print("Can fly"); }
}
class Penguin extends Bird {
public void fly () { System.out.print("Cannot fly"); }
}
and the code fragment:
class Birdie {
public static void main (String [ ] args) {
fly( ( ) -> new Bird ( ));
fly (Penguin : : new);
}
/* line n1 */
}
Which code fragment, when inserted at line n1, enables the Birdie class to compile?
- A. static void fly (Consumer<Bird> bird) {
bird :: fly ();
} - B. static void fly (Supplier<? extends Bird> bird) {
LOST - C. static void fly (Supplier<Bird> bird) {
bird.get( ) fly ();
} - D. static void fly (Consumer<? extends Bird> bird) {
bird.accept( ) fly ();
}
Answer: C
Explanation:
Explanation
NOTE: Very confusing question. There is no logic in the options.
NEW QUESTION 44
Given:
What is the result?
- A. false, false
- B. true, true
- C. false, true
- D. true, false
Answer: C
NEW QUESTION 45
Given:
1. abstract class Shape {
2. Shape ( ) { System.out.println (“Shape”); }
3. protected void area ( ) { System.out.println (“Shape”); }
4. }
5.
6. class Square extends Shape {
7. int side;
8. Square int side {
9. /* insert code here */
10. this.side = side;
11. }
12. public void area ( ) { System.out.println (“Square”); }
13. }
14. class Rectangle extends Square {
15. int len, br;
16. Rectangle (int x, int y) {
17. /* insert code here */
18. len = x, br = y;
19. }
20. void area ( ) { System.out.println (“Rectangle”); }
21. }
Which two modifications enable the code to compile?
- A. At line 20, use public void area ( ) {
- B. At line 12, remove public
- C. At line 9, insert super ( );
- D. At line 1, remove abstract
- E. At line 17, insert super (); super.side = x;
- F. At line 17, insert super (x);
Answer: A,F
NEW QUESTION 46
Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { }
and the code fragment:
class App {
public void doRegister(String name, int age)
throws UserException, AgeOutOfLimitException {
if (name.length () <= 60) {
throw new UserException ();
} else if (age > 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println("User is registered.");
}
}
public static void main(String[ ] args) throws UserException {
App t = new App ();
t.doRegister("Mathew", 60);
}
}
What is the result?
- A. A compilation error occurs in the main method.
- B. A UserException is thrown.
- C. An AgeOutOfLimitException is thrown.
- D. User is registered.
Answer: B
NEW QUESTION 47
Which action can be used to load a database driver by using JDBC3.0?
- A. Use the DriverManager.getDrivermethod to load the driver class.
- B. Include the JDBC driver class in a jdbc.propertiesfile.
- C. Use the java.lang.Class.forNamemethod to load the driver class.
- D. Add the driver class to the META-INF/services folder of the JAR file.
Answer: A
NEW QUESTION 48
Given:
and the command:
java Product 0
What is the result?
- A. New Price: 0.0
- B. An AssertionError is thrown.
- C. A NumberFormatException is thrown at run time.
- D. A compilation error occurs at line n1.
Answer: C
NEW QUESTION 49
The protected modifier on a Field declaration within a public class means that the field
______________.
- A. Cannot be modified
- B. Can be read but not written from outside the class
- C. Can be read and written from this class and its subclasses only within the same package
- D. Can be read and written from this class and its subclasses defined in any package
Answer: D
Explanation:
http://beginnersbook.com/2013/05/java-access-modifiers/
NEW QUESTION 50
......
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