1Z0-819試験無料問題集（297題）「Oracle Java SE 11 Developer 認定」

出題：1

Given:

A. adf

B. Abcd

C. The compilation fails.

D. Abd

E. Abdf

正解：B 解答を投票する

出題：2

Given:

Which make class thread safe?

A. Class A is thread safe.

B. Make foo and sets synchronized.

C. Make foo synchronized.

D. Make a synchronized.

E. Make setB synchronized.

正解：D 解答を投票する

出題：3

A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?

A.

B.

C.

D.

正解：D 解答を投票する

出題：4

Given:

Which three are true?

A. b1. foo(c) prints Bonjour le monde!

B. f1.foo(c) prints Hello world!

C. b1.foo(c) prints o1a Mundo!

D. F2.foo(c) prints hello world !

E. f1.foo(c) prints Honjour le mond!

F. f1.foo(c) prints hello world!

G. f2.foo(c) prints ola Mund!

H. f1.foo(c) prints ola Mundo1

I. b1.foo(c) prints Bonjour le monde!

正解：B,E,F 解答を投票する

出題：5

Given these declarations:

and these two code fragments:
Fragment 1:

Fragment 2:

Which code fragment is preferred and why?

A. Fragment 2 because it explicitly specifies the SQL types of the column values.

B. Fragment 1 because it is more performant.

C. Fragment 2 because it prevents SQL injection.

D. Fragment 1 because it is shorter.

正解：C 解答を投票する

出題：6

Which is true?

A. The code compiles and runs successfully but with a wrong answer (i.e., a bug).

B. Code compiles but throws a runtime exception when run.

C. The code does not compile successfully.

D. It prints 666.

正解：B 解答を投票する

出題：7

What is the result?

A. 357

B. 35

C. 235

D. An ArrayIndexOutOfBoundsException is thrown at runtime.

E. 2357

正解：A 解答を投票する

出題：8

Given:

What is required to make the Foo class thread safe?

A. Move the declaration of lock inside the foo method.

B. No change is required.

C. Make the declaration of lock static.

D. Replace the lock constructor call with new ReentrantLock (true).

正解：D 解答を投票する

出題：9

Given:

What is the result?

A. TuesdayUnknown

B. The compilation fails.

C. Tuesday

D. Unknown

E. WorkingUnknown

F. Working

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：10

Given the code fragment:

What is the result?

A. USD -> 1.00
GBP -> 0.75
EUR -> 0.84
CNY -> 6.42

B. The compilation fails.

C. CNY -> 6.42
EUR -> 0.84
GBP -> 0.75
USD -> 1.00

D. EUR -> 0.84
GBP -> 0.75
USD -> 1.00
CNY -> 6.42

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：11

Given the code fragment:

What change on line 1 will make this code compile?

A. Add catch (L |M N e).

B. Add catch (M |L e).

C. Add catch (L e).

D. Add catch (L |N e).

E. Add catch (N | L | M e).

正解：C 解答を投票する

出題：12

Given:

What is the result?

A. Ans: a

B. Ans:

C. A java:util. NsuchElementException is thrown at runtime

D. The compilation fails

正解：C 解答を投票する

出題：13

Given:

Which expression when added at line 1 will produce the output of 1.17?

A. float z = (float)(Math.round((float)x/y*100)/100);

B. float z = Math.round((float)x/y,2);

C. float z = Math.round((float)x/y*100)/(float)100;

D. float z = Math.round((int)(x/y),2);

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：14

Given:

Which one is correct?

A. The compilation fails.

B. An IllegalThreadStateException is thrown at run time.

C. Four threads are created.

D. Three threads are created.

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：15

Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

A. Option E

B. Option D

C. Option C

D. Option A

E. Option B

正解：A,D 解答を投票する

出題：16

Given:

executed with this command:
java Main one two three
What is the output of this class?

A. A java.lang.ArrayIndexOutOfBoundsException is thrown.

B. The compilation fails.

C. 1) one

D. 1) one2) two3) three

E. nothing

正解：D 解答を投票する

出題：17

Given:

What is the result?

A. [A, B, C]
[A, B, C]

B. [A, B, C]
followed by an exception thrown on line 11.

C. On line 9, an exception is thrown at run time.

D. [A, B, C]
[ B, C]

正解：A 解答を投票する

出題：18

Given:

Which two are correct? (Choose two.)

A. Option D

B. Option C

C. Option A

D. Option B

正解：A,B 解答を投票する

1Z0-819試験無料問題集「Oracle Java SE 11 Developer 認定」