[Nov-2021] Pass 1z0-809 Exam in First Attempt Updated1z0-809 PracticeDump Exam Question
Java SE Dumps 1z0-809 Exam for Full Questions - Exam Study Guide
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How to study the 1Z0-809 Exam
There are two main types of resources for preparation of certification exams first there are the study guides and the books that are detailed and suitable for building knowledge from ground up then there are video tutorial and lectures that can somehow ease the pain of through study and are comparatively less boring for some candidates yet these demand time and concentration from the learner. Smart Candidates who want to build a solid foundation in all exam topics and related technologies usually combine video lectures with study guides to reap the benefits of both but there is one crucial preparation tool as often overlooked by most candidates the practice exams. Practice exams are built to make students comfortable with the real exam environment. Statistics have shown that most students fail not due to that preparation but due to exam anxiety the fear of the unknown. PracticeDump expert team recommends you to prepare some notes on these topics along with it don’t forget to practice Oracle 1Z0-809 dumps which have been written by our expert team, Both these will help you a lot to clear this exam with good marks.
Certification Path
Oracle Java SE 8 Programmer I can act as a prerequisite for this 1Z0-809 exam.
NEW QUESTION 51
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 */
1 0. this.side = side;
1 1. }
1 2. public void area ( ) { System.out.println ("Square"); }
1 3. }
1 4. class Rectangle extends Square {
1 5. int len, br;
1 6. Rectangle (int x, int y) {
1 7. /* insert code here */
1 8. len = x, br = y;
1 9. }
2 0. void area ( ) { System.out.println ("Rectangle"); }
2 1. }
Which two modifications enable the code to compile?
- A. At line 9, insert super ( );
- B. At line 1, remove abstract
- C. At line 17, insert super (); super.side = x;
- D. At line 12, remove public
- E. At line 17, insert super (x);
- F. At line 20, use public void area ( ) {
Answer: D,E
NEW QUESTION 52
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 53
Which two code blocks correctly initialize a Locale variable?
- A. Locale loc4 = Locale.UK;
- B. Locale loc3 = Locale.getLocaleFactory("RU");
- C. Locale loc2 = Locale.getInstance("ru");
- D. Locale loc5 = new Locale ("ru", "RU");
- E. Locale loc1 = "UK";
Answer: A,D
NEW QUESTION 54
Given the code fragment:
BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2; //line n1 System.out.println(val.apply(10, 10.5));
What is the result?
- A. A compilation error occurs at line n1.
- B. 0
- C. A compilation error occurs at line n2.
- D. 20.5
Answer: A
NEW QUESTION 55
Given:
class RateOfInterest {
public static void main (String[] args) {
int rateOfInterest = 0;
String accountType = "LOAN";
switch (accountType) {
case "RD";
rateOfInterest = 5;
break;
case "FD";
rateOfInterest = 10;
break;
default:
assert false: "No interest for this account"; //line n1
}
System.out.println ("Rate of interest:" + rateOfInterest);
}
}
and the command:
java -ea RateOfInterest
What is the result?
- A. An AssertionError is thrown.
- B. Rate of interest: 0
- C. A compilation error occurs at line n1.
- D. No interest for this account
Answer: D
NEW QUESTION 56
Given:
and the code fragment:
What is the result?
- A. The program compiles successfully.
- B. A compilation error occurs because the tryblock doesn't have a catchor finallyblock.
- C. A compilation error occurs at line n2.
- D. A compilation error occurs at line n1.
Answer: B
NEW QUESTION 57
Given:
Item table
* ID, INTEGER: PK
* DESCRIP, VARCHAR(100)
* PRICE, REAL
* QUANTITY< INTEGER
And given the code fragment:
9. try {
10. Connection conn = DriveManager.getConnection(dbURL, username, password);
11. String query = "Select * FROM Item WHERE ID = 110";
12. Statement stmt = conn.createStatement();
13. ResultSet rs = stmt.executeQuery(query);
14. while(rs.next()) {
15. System.out.println("ID: " + rs.getInt("Id"));
16. System.out.println("Description: " + rs.getString("Descrip"));
17. System.out.println("Price: " + rs.getDouble("Price"));
18. System.out.println(Quantity: " + rs.getInt("Quantity"));
19. }
20. } catch (SQLException se) {
21. System.out.println("Error");
22. }
Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWord exists.
The SQL query is valid.
What is the result?
- A. Compilation fails.
- B. An exception is thrown at runtime.
- C. The code prints Error.
- D. The code prints information about Item 110.
Answer: D
NEW QUESTION 58
Given the code fragments:
and
What is the result?
- A. null
- B. DogCatMouse
- C. [Dog, Cat, Mouse]
- D. A compilation error occurs.
Answer: C
NEW QUESTION 59
Given the definition of the Country class:
public class country {
public enum Continent {ASIA, EUROPE}
String name;
Continent region;
public Country (String na, Continent reg) {
name = na, region = reg;
}
public String getName () {return name;}
public Continent getRegion () {return region;}
}
and the code fragment:
List<Country> couList = Arrays.asList (
new Country ("Japan", Country.Continent.ASIA),
new Country ("Italy", Country.Continent.EUROPE),
new Country ("Germany", Country.Continent.EUROPE)); Map<Country.Continent, List<String>> regionNames = couList.stream () .collect(Collectors.groupingBy (Country ::getRegion, Collectors.mapping(Country::getName, Collectors.toList())))); System.out.println(regionNames);
What is the output?
- A. {EUROPE = [Germany, Italy], ASIA = [Japan]}
- B. {EUROPE = [Italy, Germany], ASIA = [Japan]}
- C. {ASIA = [Japan], EUROPE = [Italy, Germany]}
- D. {EUROPE = [Germany], EUROPE = [Italy], ASIA = [Japan]}
Answer: B
NEW QUESTION 60
A method is declared to take three arguments. A program calls this method and passes only two arguments. What is the results?
- A. The third argument is given the appropriate falsy value for its declared type. F) An exception occurs when the method attempts to access the third argument.
- B. The third argument is given the value null.
- C. Compilation fails.
- D. The third argument is given the value zero.
- E. The third argument is given the value void.
Answer: C
NEW QUESTION 61
Given:
What is the result?
- A. 6 8 10
- B. 6 7 8
- C. Compilation fails
- D. 0 1 2
- E. 7 8 9
Answer: B
NEW QUESTION 62
Given the code fragment:
List<String> colors = Arrays.asList("red", "green", "yellow");
Predicate<String> test = n - > {
System.out.println("Searching...");
return n.contains("red");
};
colors.stream()
. filter(c -> c.length() > 3)
. allMatch(test);
What is the result?
- A. Searching...
Searching...
Searching... - B. Searching...
Searching... - C. Searching...
- D. A compilation error occurs.
Answer: C
NEW QUESTION 63
Given the code fragment:
Which modification enables the code to print Price 5 New Price 4?
- A. Replace line n1with .forEach (e -> System.out.print ("Price" + e))
- B. Replace line n2with .map (n -> System.out.println ("New Price" + n -1))and remove line n3
- C. Replace line n2 with .mapToInt (n -> n - 1);
- D. Replace line n3with .forEach (n -> System.out.println ("New Price" + n));
Answer: B
NEW QUESTION 64
Given:
class CheckClass {
public static int checkValue (String s1, String s2) {
return s1 length() - s2.length();
}
}
and the code fragment:
String[] strArray = new String [] {"Tiger", "Rat", "Cat", "Lion"}
//line n1
for (String s : strArray) {
System.out.print (s + " ");
}
Which code fragment should be inserted at line n1 to enable the code to print Rat Cat Lion Tiger?
- A. Arrays.sort(strArray, (CheckClass : : new).checkValue);
- B. Arrays.sort(strArray, CheckClass : : new : : checkValue);
- C. Arrays.sort(strArray, (CheckClass : : new) : : checkValue);
- D. Arrays.sort(strArray, CheckClass : : checkValue);
Answer: D
NEW QUESTION 65
Given the code fragment:
BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2;//line n1
System.out.println(val.apply(10, 10.5));
What is the result?
- A. A compilation error occurs at line n1.
- B. 0
- C. A compilation error occurs at line n2.
- D. 20.5
Answer: A
NEW QUESTION 66
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs at line n1.
- B. 0
- C. 1
- D. An Exception is thrown at run time.
Answer: C
NEW QUESTION 67
Given the code fragments:
and
What is the result?
- A. France
Not Found - B. France
Optional[NotFound] - C. Optional [France]
Optional [NotFound] - D. Optional[France]
Not Found
Answer: A
NEW QUESTION 68
Given:
What is the result?
- A. 0 0 30 40
- B. 10 20 30 40
- C. Compilation fails.
- D. An exception is thrown at runtime.
Answer: A
NEW QUESTION 69
Given the code fragment:
What is the result?
- A. 10 : 10
- B. 5 : 5
- C. Compilation fails.
- D. 5 : 10
Answer: A
NEW QUESTION 70
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 () < 6) {
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: C
NEW QUESTION 71
......
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