
Java lvl2
Quiz
•
Computers
•
Professional Development
•
Practice Problem
•
Medium
Happy Day
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9 questions
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1.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
Что выведется в консоль?
one
two
three
four
five
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the result of the following code?
StringBuilder sb = new StringBuilder();
sb.append("aaa").insert(1, "bb").insert(4, "ccc");
System.out.println(sb);
abbaaccc
abbaccca
bbaaaccc
bbaaccca
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
01+89–
012+9–
012+–9
The code does not compile.
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Какой из перечисленных методов скомпилируется без ошибки?
protected void onCreate() { };
protected void onCreate();
public onCreate() { };
public int onCreate() { };
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Что выведет в консоль?
-1
9
81
Compiler error on line 9
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Выберите правильный ответ
Все скомпилируется без ошибок
Ошибка в строке 2
Ошибка в строке 4
Ошибка в строке 5
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Зачем используется класс MutableLiveData?
Для отслеживания изменения объектов и реакции на изменение
Для создания данных
Для изменения данных
Для работы с базой данных
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