Intelligent Knockout.js Test

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| By Cripstwick

Cripstwick

Community Contributor

Quizzes Created: 636 | Total Attempts: 733,305

Questions: 10 | Attempts: 568 | Updated: Mar 21, 2023

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Based on JavaScript, Knockout. Js is a dynamic, standalone web framework which uses the Model-View-ViewModel pattern alongside templates. Take this quiz to assess your knowledge of Knockout. Js.

Questions and Answers

1.

Knockout is a _________ client side pattern.
- A.
  
  Open source
- B.
  
  Close source
- C.
  
  MIT license
- D.
  
  None of the above
Correct Answer
A. Open source

Explanation
Knockout is an open-source client-side pattern. This means that it is a software framework or design pattern that is freely available for anyone to use, modify, and distribute. Being open-source allows developers to access and contribute to the codebase, making it a collaborative and community-driven project. This openness fosters innovation, transparency, and flexibility, as developers can customize and extend the framework to suit their specific needs.

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2.

Knockout is a _____ library.
- A.
  
  Java
- B.
  
  JavaScript
- C.
  
  PHP
- D.
  
  Python
Correct Answer
B. JavaScript

Explanation
Knockout is a JavaScript library.

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3.

Knockout is mostly used for designing...
- A.
  
  Double page applications
- B.
  
  Websites
- C.
  
  Single page applications
- D.
  
  Mobile websites
Correct Answer
C. Single page applications

Explanation
Knockout is mostly used for designing single page applications. Single page applications (SPAs) are web applications that load a single HTML page and dynamically update the content as the user interacts with the application. Knockout is a JavaScript library that helps in implementing the Model-View-ViewModel (MVVM) pattern, which is commonly used in SPAs to separate the data model, the presentation logic, and the user interface. Knockout provides features like data binding, dependency tracking, and templating, which are essential for building robust and interactive SPAs.

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4.

When does Knockout refresh the UI automatically?
- A.
  
  When View is updated
- B.
  
  When View is refreshed
- C.
  
  When ViewModel is updated
- D.
  
  When ViewModel is refreshed
Correct Answer
C. When ViewModel is updated

Explanation
Knockout refreshes the UI automatically when the ViewModel is updated. This means that any changes made to the ViewModel's properties or observables will trigger a refresh of the corresponding elements in the UI, ensuring that the UI reflects the updated data.

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5.

Knockout files are usually _____ zip files.
- A.
  
  Small
- B.
  
  Large
- C.
  
  Closed
- D.
  
  Open
Correct Answer
A. Small

Explanation
Knockout files are usually small zip files. This implies that knockout files are typically compressed and occupy less storage space compared to other file formats.

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6.

In how many ways can Knockout templates be used?
- A.
  
  1
- B.
  
  3
- C.
  
  2
- D.
  
  4
Correct Answer
C. 2

Explanation
Knockout templates can be used in two ways. The first way is by using inline templates, where the template code is written directly in the HTML file. The second way is by using external templates, where the template code is stored in a separate file and can be loaded dynamically. Both of these methods allow developers to separate the UI logic from the data and create reusable templates for rendering data in a consistent manner.

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7.

What type of templating is used to work for third-party template engines?
- A.
  
  Native templating
- B.
  
  String-based templating
- C.
  
  Both
- D.
  
  None
Correct Answer
B. String-based templating

Explanation
String-based templating is used to work for third-party template engines. This type of templating involves using strings as templates, where placeholders are defined and later replaced with actual values. Third-party template engines, such as Mustache or Handlebars, utilize this approach to generate dynamic content by substituting variables or expressions within the template strings. Native templating, on the other hand, refers to the built-in templating system provided by a programming language or framework. Since the question specifically asks about third-party template engines, the correct answer is string-based templating.

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8.

How many types of data binding are there in Knockout?
- A.
  
  4
- B.
  
  6
- C.
  
  7
- D.
  
  8
Correct Answer
C. 7

Explanation
Knockout is a JavaScript library that allows developers to create dynamic and responsive user interfaces. It provides various ways to bind data between the UI and the underlying data model. In the case of Knockout, there are seven types of data binding available. These include text binding, value binding, visible binding, foreach binding, if binding, css binding, and event binding. Each type of binding serves a specific purpose and allows developers to easily manipulate and update the UI based on changes in the data model.

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9.

All the following are types of data binding except...
- A.
  
  Visible binding
- B.
  
  CSS binding
- C.
  
  Text binding
- D.
  
  Virtual binding
Correct Answer
D. Virtual binding

Explanation
Virtual binding is not a type of data binding. Data binding is a technique used in software development to establish a connection between the user interface and the data model. It allows automatic synchronization of data between the two, eliminating the need for manual updates. Visible binding, CSS binding, and text binding are all examples of data binding, as they enable the dynamic display and manipulation of data in the user interface. However, virtual binding is not a recognized term or technique in data binding.

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10.

What does MVVM stands for
- A.
  
  Model–View–ViewModal
- B.
  
  Model–View–ViewModel
- C.
  
  Modal–View–ViewModal
- D.
  
  Modal–View–ViewModel
Correct Answer
B. Model–View–ViewModel

Explanation
MVVM stands for Model-View-ViewModel. In this architectural pattern, the Model represents the data and business logic, the View represents the user interface, and the ViewModel acts as an intermediary between the Model and the View. The ViewModel exposes the data from the Model to the View and contains the logic to handle user interactions. This separation of concerns allows for better maintainability and testability of the code.

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