Certification Topics of 1Z0-819 Exam PDF Recently Updated Questions
1Z0-819 Exam Prep Guide: Prep guide for the 1Z0-819 Exam
Oracle 1z1-819 certification exam is designed for Java developers who want to validate their expertise in Java SE 11 development. 1Z0-819 exam tests the candidate's ability to develop Java applications using the latest features and enhancements of Java SE 11. It covers a wide range of topics including Java fundamentals, object-oriented programming, concurrency, and I/O streams. 1Z0-819 exam is intended for developers who have at least 1-2 years of experience in Java development and want to demonstrate their mastery of the language.
Holding the Oracle 1Z0-819 certification demonstrates that you have the skills and knowledge required to develop robust and efficient Java applications using the latest Java technologies. Java SE 11 Developer certification is recognized worldwide by employers and gives you a competitive edge in the job market. It also provides a foundation for further advanced Java certifications. To prepare for the exam, candidates can take online courses, attend training sessions or self-study using books and practice exams.
NEW QUESTION # 67
Given:
What is the result?
- A. Map: 4 Keys: 0 Values: 0
- B. Map: 0 Keys: 0 Values: 0
- C. The compilation fails.
- D. Map: 4 Keys: 4 Values: 4
- E. Map: 0 Keys: 4 Values: 4
Answer: A
Explanation:
NEW QUESTION # 68
Given:
What is the output?
- A. I am an object array
- B. I am an array
- C. I am an object
- D. The compilation fails due to an error in line 1.
Answer: C
NEW QUESTION # 69
Given:
Which two statements are true if the method is added to Bar? (Choose two.)
- A. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
- B. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
- C. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
- D. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- E. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- F. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
Answer: D,E
NEW QUESTION # 70
Given:
and
Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1,
1989?
- A. Option A
- B. Option C
- C. Option D
- D. Option B
Answer: D
NEW QUESTION # 71
Given:
What is the result?
- A. 0-6
2-4 - B. 2-4
- C. 1-5
- D. 0-6
1-5
2-4 - E. 1-5
2-4 - F. 0-6
- G. The compilation fails due to an error in line 1.
Answer: C
Explanation:
NEW QUESTION # 72
Given:
What is the result?
- A. null
- B. The compilation fails due to an error in line 1.
- C. p1
- D. Joe Bloggs
Answer: B
Explanation:
NEW QUESTION # 73
Given:
What is the result?
- A. AnotherClass#methodA()SomeClass#methodA()
- B. A ClassCastException is thrown at runtime.
- C. SomeClass#methodA()SomeClass#methodA()
- D. SomeClass#methodA()AnotherClass#methodA()
- E. AnotherClass#methodA()AnotherClass#methodA()
- F. The compilation fails.
Answer: F
Explanation:
NEW QUESTION # 74
Given the code fragment:
What is the result?
- A. 2 : 3
- B. 2 : -1
- C. -1 : 2
- D. 3 : 0
Answer: B
NEW QUESTION # 75
Given:
What is the result?
- A. appleapricotgrapelemonorangewatermelon
- B. watermelonorangelemongrapeapricotapple
- C. appleorangegrapelemonapricotwatermelon
- D. nothing
Answer: B
Explanation:
NEW QUESTION # 76
Given:
What is the output?
- A. Bonjour le monde!Bonjour le monde!
- B. Bonjour le monde!Hello world!
- C. Hello world!Bonjour le monde!
- D. Hello world!Hello world!
Answer: B
Explanation:
NEW QUESTION # 77
Assume ds is a DataSource and the EMP table is defined appropriately.
What does executing this code fragment do?
- A. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
- B. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
- C. inserts one row (101, 'SMITH', 'HR')
- D. throws a SQLException
Answer: C
NEW QUESTION # 78
Given:
Which two constructors will compile and set the class field strings? (Choose two.)
- A. Option A
- B. Option C
- C. Option E
- D. Option D
- E. Option B
Answer: B,C
NEW QUESTION # 79
Given:
/code/a/Test.java
containing:
and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?
- A. java -cp /code a.Test
- B. java /code/a/Test.java
- C. java /code/a/Test.java /code/b/Best.java
- D. javac -d /code /code/a/Test.java /code/b/Best.java
- E. javac -d /code /code/a/Test.java
- F. javac -d /code /code/a/Test
Answer: D
NEW QUESTION # 80
Given:
Which two statements are valid to be written in this interface? (Choose two.)
- A. public int x;
- B. private abstract void methodC();
- C. public abstract void methodB();
- D. public String methodD();
- E. final void methodE();
- F. public void methodF(){System.out.println("F");}
- G. final void methodG(){System.out.println("G");}
Answer: C,D
NEW QUESTION # 81
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
- A. module PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
} - B. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
} - C. module PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
} - D. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
}
Answer: D
NEW QUESTION # 82
Given:
and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?
- A. FooException is unchecked.
- B. FooException is a subclass of RuntimeError.
- C. The body of foo can only throw FooException.
- D. The body of foo can throw FooException or one of its subclasses.
Answer: D
NEW QUESTION # 83
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
NEW QUESTION # 84
Given:
After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the values array is partially sorted?
- A. after line 8
- B. after line 6
- C. after line 5
- D. after line 10
Answer: B
Explanation:
NEW QUESTION # 85
Given the code fragment:
What is the result?
- A. false false true
- B. false true true
- C. false true false
- D. true false false
Answer: C
Explanation:
NEW QUESTION # 86
Given the Customer table structure:
* ID Number Primary Key
* NAME Text Nullable
Given code fragment:
Which statement inserted on line 14 sets NAME column to a NULL value?
- A. Stmt.setNull(2, java.lang, string);
- B. Stmt.setNull(2, java,sql. Types, VARCHAR);
- C. Stmt.setNull(2 string, class);
- D. Stmt.setNull(2, null);
Answer: B
NEW QUESTION # 87
Given:
Which expression when added at line 1 will produce the output of 1.17?
- A. float z = Math.round((int)(x/y),2);
- B. float z = Math.round((float)x/y*100)/(float)100;
- C. float z = Math.round((float)x/y,2);
- D. float z = (float)(Math.round((float)x/y*100)/100);
Answer: B
Explanation:
NEW QUESTION # 88
......
Oracle 1Z0-819 certification exam is designed for Java developers who want to validate their skills and knowledge in Java SE 11. 1Z0-819 exam is a combination of two exams, namely 1Z0-815 and 1Z0-816. 1Z0-819 exam assesses a candidate’s proficiency in Java syntax and fundamental programming concepts, as well as their ability to develop Java applications using Java SE 11. Java SE 11 Developer certification exam is ideal for Java developers who want to improve their career prospects and demonstrate their expertise in the Java programming language.
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