最新的Oracle 1z1-819免費考試真題

問題1

Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

A. Consumer consumer = (String args) -> System.out.print(args);

B. Consumer consumer = msg -> { return System.out.print(msg); };

C. Consumer consumer = System.out::print;

D. Consumer consumer = var arg -> {System.out.print(arg);};

正確答案: C

說明：（僅 Fast2test 成員可見）

問題2

Given:

What is the result?

A. 2134

B. 214

C. 2143

D. 234

正確答案: B

說明：（僅 Fast2test 成員可見）

問題3

Your organization makes mlib.jar available to your cloud customers. While working on a code cleanup project for mlib.jar, you see this method by customers:

What security measures should be added to this method so that it meets the requirements for a customer accessible method?

A.

B. Create a method that validates the hostName and portNumber parameters before opening the socket.

C. Make enableService private.

D. Enclose the call to new Socket In an AccessController.doPrivileged block.

正確答案: D

問題4

Given:

Assume the file on path does not exist. What is the result?

A. /u01/work/filestore.txt is deleted.

B. /u01/work/filestore.txt is not deleted.

C. The compilation fails.

D. Exception

正確答案: C

說明：（僅 Fast2test 成員可見）

問題5

Given:

What is the result?

A. Good Morning, Harry

B. Good Morning, Potter

C. Good Night, Potter

D. Good Night, Harry

正確答案: C

說明：（僅 Fast2test 成員可見）

問題6

Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?

A. [Market Road, 1000]

B. [Peter, 30, Market Road]

C. [Peter, 25, null, 1000]

D. An exception is thrown at run time.

正確答案: D

說明：（僅 Fast2test 成員可見）

問題7

Given the code fragment:

What is the result?

A. 13

B. 12

C. 123

D. 23

正確答案: D

說明：（僅 Fast2test 成員可見）

問題8

Given:

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

A. catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { }

B. catch(FileNotFoundException | IndexOutOfBoundsException e) { }

C. catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { }

D. catch(FileNotFoundException | IOException e) { }

E. catch(IOException e) { }

正確答案: E

問題9

Given:

What is the output?

A. Duke

B. null

C. A NoSuchElementException is thrown at run time.

D. A NullPointerException is thrown at run time.

正確答案: A

說明：（僅 Fast2test 成員可見）

最新的Oracle Java SE 11 Developer - 1z1-819免費考試真題

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