1z1-819 by Oracle Actual Free Exam Q&As

Question 1

Given:

What is the result?

A. It throws a runtime exception. B. Value of Euler = 2.71828 C. The code does not compile. D. Value of Euler = "2.71828"

Discussion 0

Correct Answer: C Vote an answer

Question 2

Analyze the code:

Which two options can you insert inside println method to produce Global:namescope? (Choose two.)

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

Discussion 0

Correct Answer: A,C Vote an answer

Question 3

var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

A. double avg = numbers.stream().average().getAsDouble(); B. double avg = numbers.parallelStream().mapToInt (m -> m).average().getAsDouble (); C. double avg = numbers.stream().parallel().averagingDouble(a -> a); D. double avg = numbers.stream().collect(Collectors.averagingDouble(n -> n)); E. double avg = numbers.stream().mapToInt (i -> i).average().parallel();

Discussion 0

Correct Answer: A,B Vote an answer

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Question 4

Given:

What is the result?

A. nothing B. appleorangegrapelemonapricotwatermelon C. appleapricotgrapelemonorangewatermelon D. watermelonorangelemongrapeapricotapple

Discussion 0

Correct Answer: D Vote an answer

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Question 5

You replace the code on line 1 to use ParallelStream.

Which one is correct?

A. The compilation fails. B. The code will produce the same result. C. A NoSuchElementException is thrown at run time. D. The code may produce a different result.

Discussion 0

Correct Answer: D Vote an answer

Question 6

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, null); B. Stmt.setNull(2, java.lang, string); C. Stmt.setNull(2, java,sql. Types, VARCHAR); D. Stmt.setNull(2 string, class);

Discussion 0

Correct Answer: C Vote an answer

Question 7

Given:

Which two independent changes will make the Main class compile? (Choose two.)

A. Change line 1 to static class Student {. B. Change line 1 to public class Student {. C. Change line 3 to Student student = new Student("Biology");. D. Move the entire Student class declaration to a separate Java file, Student.java. E. Change line 2 to public Student(String classname).

Discussion 0

Correct Answer: C,E Vote an answer

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Question 8

Given the code fragment:

What is the result?

A. 2 4 6 B 10 B. 13 5 7 9 C. 1 3 5 7 9 11 D. 2 4 6 8

Discussion 0

Correct Answer: C Vote an answer

Question 9

Given:

What is the result?

A. The compilation fails. B. 1.99,2.99,0.0 C. 1.99,2.99,0 D. 1.99,2.99

Discussion 0

Correct Answer: A Vote an answer

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Question 10

Given the code fragment:

What is the result?

A. [Red:100, Red75, Yello:75, Yellow:50] B. Yellow:75, Yellow:50, Red:100, Red:75] C. An Exception is thrown at runtime. D. [Yellow:50, yellow:75, Red:75, Red:100] E. [Red:75, Red:100, Yellow:500, Red100 Red: 75]

Discussion 0

Correct Answer: E Vote an answer

Question 11

Given:

What must be added in line 1 to compile this class?

A. catch(FileNotFoundException | IOException e) { } B. catch(FileNotFoundException | IndexOutOfBoundsException e) { } C. catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { } D. catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { } E. catch(IOException e) { }

Discussion 0

Correct Answer: E Vote an answer

Question 12

Given:

What is the result?

A. 3241 B. 2134 C. 214 D. 234

Discussion 0

Correct Answer: A Vote an answer

Question 13

Assuming the user credentials are correct, which expression will create a Connection?

Discussion 0

Correct Answer: B Vote an answer

Question 14

Given:
var fruits = List.of("apple", "orange", "banana", "lemon");
You want to examine the first element that contains the character n. Which statement will accomplish this?

A. fruits.stream().filter(f -> f.contains("n")).forEachOrdered(System.out::print); B. Optional<String> result = fruits.stream().anyMatch(f -> f.contains("n")); C. String result = fruits.stream().filter(f -> f.contains("n")).findAny(); D. Optional<String> result = fruits.stream().filter(f -> f.contains ("n")).findFirst ();

Discussion 0

Correct Answer: A Vote an answer

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Oracle Java SE 11 Developer - 1z1-819 Exam Practice Test