
JAVA6
Quiz
•
English
•
1st Grade
•
Practice Problem
•
Medium
Cương Thọ
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151 questions
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1.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Chon interface
@FunctionalInterface
public interface Demo4Inter{
void m1(int x);
}
Hãy chọn mã đúng khi tạo đối tượng
Demo4Inter o4 = x - > System.out.println(x);
Demo4Inter o3 = x - > {};
Demo4Inter o1 = new Demo4Inter() { @Override public void m1(int x) {} };
Demo4Inter o2 = new Demo4Inter() { @Override public void m1(int x) {} public void m2() {} };
2.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Chon interface
@FunctionalInterface
public interface Demo4Inter{
void m1(int x);
}
Hãy chọn mã đúng khi tạo đối tượng
Demo4Inter o3 = x - > {};
Demo4Inter o4 = x - > System.out.println(x);
Demo4Inter o1 = new Demo4Inter() { @Override public void m1(int x) {} };
Demo4Inter o2 = new Demo4Inter() { @Override public void m1(int x) {} @Override public void m2() {} };
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Đâu là cú pháp đúng của phương thức readValue() trong ObjectMapper
1. readValue(source, Class < T > ): T
2. readValue(source, TypeReference < T > ): T
1 sai, 2 đúng
1 đúng, 2 đúng
1 sai, 2 sai
1 đúng, 2 sai
4.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Đâu là phương thức trung gian trong Stream API?
filter()
map()
sorted()
forEach()
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Đâu là phương thức trung gian trong Stream API?
count()
min()
mapToDouble()
max()
6.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Cho lớp Student:
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Student {
String name;
Boolean gender = false;
Double marks = 0.0;
}
Hãy điền mã đúng vào chỗ trống:
List < Student > list = Arrays.asList(
new Student("Nguyễn Văn Tèo", true, 7.5)
...
);
Collections.sort(list, _____);
(sv1, sv2) - > sv1.getName().compareTo(sv2.getName())
(sv1, sv2) - > { return sv1.getName().compareTo(sv2.getName());}
(sv1, sv2) - > sv1.getName().compareTo(sv2.getName());
(sv1, sv2) - > { return sv1.getName().compareTo(sv2.getName())}
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Đâu là các phương thức của ObjectMapper được sử dụng để đọc nguồn dữ liệu JSON và cho kết quả là JSonNode
readTree()
readValue()
writeValueAsString()
writeValue()
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