Hard
Given a class A that implements a method to record the values of the class members in a database. Given a class A1 that inherits from A and a class A2 that also inherits from A.
You must develop as quickly as possible, and with the least code possible, a program that allows the recording of the data of an instance A, an instance A1 or an instance A2 in a database. How will you proceed? (two choices required)
Author: Eric HostaleryStatus: PublishedQuestion passed 1386 times
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Can an interface inherit from another interface?8
Can we extend an abstract class in Java?14
Is the following code valid?
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
}
const person = new Person('John', 20);
console.log(person.name);
console.log(person.age);9
You need to develop a class for which there should be only one instance throughout your application. Which design pattern should you use for this?4
Is the following code valid?
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
}
const person = new Person('John', 20);
console.log(person.name);
console.log(person.age);4
Is the following code valid?
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
}
const person = new Person('John', 20);
console.log(person.name);
console.log(person.age);4
Which design pattern allows to dynamically add responsibilities to an object?