최신 1z1-819 무료덤프 - Oracle Java SE 11 Developer

문제1

Which two safely validate inputs? (Choose two.)

A. Use trusted domain-specific libraries to validate inputs.

B. Assume inputs have already been validated.

C. Modify the input values, as needed, to pass validation.

D. Delegate numeric range checking of values to the database.

E. Accept only valid characters and input values.

정답: D,E

문제2

Given:

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

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

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

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

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

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제3

Given:

What is the result?

A. Good Morning, Harry

B. Good Night, Potter

C. Good Morning, Potter

D. Good Night, Harry

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제4

Given:

You want to obtain the Filechannel object on line 1.
Which code fragment will accomplish this?

A.

B.

C.

D.

정답: D

문제5

Given the code fragment:

What is the result?

A. -1 : 2

B. 3 : 0

C. 2 : 3

D. 2 : -1

정답: D

문제6

Given:

and the code fragment:
Which two Map objects group all employees with a salary greater than 30 by neighborhood? (Choose two.)

A.

B.

C.

D.

E.

정답: A

문제7

Given:

What is the output?

A. 1 2 [1, 2, 3, 4] 3 four

B. 1 2 [1, 2, 3, four] 3 4

C. 1 2 [1, 2, 3, four] 3 four

D. 1 2 [1, 2, 3, 4] 3 4

정답: D

문제8

Given the code fragment:

You must define the A exception class. The program execution must be terminated if the condition at line 19 is true and an a exception is thrown at line 20.
Which code fragment at line n1 defines A as per the requirement?

A. Class A extends ArithmeticException {

B. Class A extends Exception {

C. Class A extends RuntimeException {

D. Class A extends Throwable {

정답: B

문제9

Which three initialization statements are correct? (Choose three.)

A. int x = 12_34;

B. int[][][] e = {{1,1,1},{2,2,2}};

C. short sh = (short)'A';

D. boolean false = (4 != 4);

E. String contact# = "(+2) (999) (232)";

F. float x = 1f;

G. byte b = 10;
char c = b;

정답: A,C,F

문제10

Given:

What is the result?

A. The code does not compile.

B. Value of Euler = 2.71828

C. Value of Euler = "2.71828"

D. It throws a runtime exception.

정답: A

문제11

Given:

Why does D cause a compilation error?

A. D inherits a() from B and C but the return types are incompatible.

B. D inherits a() only from C.

C. D does not define any method.

D. D extends more than one interface.

정답: A

문제12

Given:

When is the readObject method called?

A. The method is never called.

B. after this object is deserialized

C. before this object is deserialized

D. after this object is serialized

E. before this object Is serialized

정답: B

문제13

Given:
Automobile.java

Car.java

What must you do so that the code prints 4?

A. Replace the code in line 2 with Car ob = new Car();

B. Remove abstract keyword in line 1.

C. Remove the parameter from wheels method in line 3.

D. Add @Override annotation in line 2.

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제14

Given:

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

A. Change line 2 to public Student(String classname).

B. Change line 1 to public class Student {.

C. Change line 3 to Student student = new Student("Biology");.

D. Change line 1 to static class Student {.

E. Move the entire Student class declaration to a separate Java file, Student.java.

정답: A,C

설명: (DumpTOP 회원만 볼 수 있음)

문제15

Which interface in the java.util.function package can return a primitive type?

A. BiFunction

B. ToDoubleFunction

C. LongConsumer

D. Supplier

정답: B

문제16

Given:

What is the result?

A. sphynx
oxicat
laperm
korat
bengal
abyssinian

B. abyssinian
bengal
korat
laperm
oxicat
sphynx

C. abyssinian
oxicat
korat
laperm
bengal
sphynx

D. nothing

정답: A

최신 1z1-819 무료덤프 - Oracle Java SE 11 Developer

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