JavaScript ES6 Features Overview
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Questions and Answers

What is a primary function of Sets in JavaScript?

  • Allow for computation with arrays.
  • Store key-value pairs with duplicate keys.
  • Create unique identifiers that can clash.
  • Manage collections of unique values. (correct)
  • How do Map objects introduced in ES6 benefit data management?

  • They can only store string keys.
  • They store values in an unordered collection.
  • They allow storing key-value pairs with any type of key. (correct)
  • They ensure all keys are integers.
  • What role do Proxies play in JavaScript?

  • They provide a way to prevent data interception.
  • They intercept and control operations on objects. (correct)
  • They optimize memory management in arrays.
  • They allow modification of the array prototype.
  • Which of the following accurately describes a feature of ES6 regarding error handling?

    <p>It enables multiple catch blocks within a single try block.</p> Signup and view all the answers

    What does the enhanced instanceof method in ES6 primarily aim to improve?

    <p>The validation of objects against their prototype chains.</p> Signup and view all the answers

    What is a primary benefit of using let and const over var?

    <p>They prevent variable hoisting and provide block scope.</p> Signup and view all the answers

    Which feature uses backticks to create strings with embedded variables?

    <p>Template Literals</p> Signup and view all the answers

    What does destructuring allow developers to do?

    <p>Extract values from arrays or objects into individual variables.</p> Signup and view all the answers

    What is the primary use of Promises in ES6?

    <p>To simplify asynchronous operations.</p> Signup and view all the answers

    Which of the following is a correct definition of spread syntax?

    <p>It merges two objects into one.</p> Signup and view all the answers

    How do classes in ES6 contribute to JavaScript programming?

    <p>By providing a structured approach to object-oriented programming.</p> Signup and view all the answers

    What is the purpose of specifying default parameters in functions?

    <p>To provide fallback values when no arguments are supplied.</p> Signup and view all the answers

    Which array methods were expanded in ES6?

    <p>map, filter, and reduce</p> Signup and view all the answers

    Signup and view all the answers

    Who should queries on rights and licenses be directed to?

    <p>World Bank Publications</p> Signup and view all the answers

    Which photo credits a photographer associated with the World Bank in Sudan?

    <p>Arne Hoel</p> Signup and view all the answers

    What is the primary focus of the World Bank Environmental and Social Framework?

    <p>Sustainable Development</p> Signup and view all the answers

    Which country is represented by a photo of rural laborers tending to a manioc crop?

    <p>Brazil</p> Signup and view all the answers

    What is the primary purpose of the World Bank Environmental and Social Policy?

    <p>To guide investment project financing</p> Signup and view all the answers

    Which of the following is NOT an example of a photo credited to the World Bank?

    <p>River in Brazil</p> Signup and view all the answers

    According to the document, what is included in the contents section?

    <p>Bank requirements</p> Signup and view all the answers

    Who is credited with the cover design of the publication?

    <p>Beth Stover</p> Signup and view all the answers

    What is the main purpose of the environmental and social due diligence conducted by the Bank?

    <p>To assist in deciding whether to provide support for a proposed project</p> Signup and view all the answers

    How does the Bank ensure that the environmental and social due diligence is appropriate to the project?

    <p>By working with the Borrower to identify necessary measures</p> Signup and view all the answers

    What happens after the assessment of the Borrower’s Environmental and Social Frame work is completed?

    <p>The Bank discloses a summary of the assessment on its website</p> Signup and view all the answers

    What role do recent studies and assessments play in the Bank's decision-making process?

    <p>They contribute to deciding how social and environmental risks will be managed</p> Signup and view all the answers

    Which of the following best describes the Bank's approach to handling environmental and social risks?

    <p>The approach is proportionate to the project’s scale and level of risk</p> Signup and view all the answers

    What must Borrowers conduct for projects proposed for Bank support?

    <p>Environmental and social assessment</p> Signup and view all the answers

    What is the purpose of conducting an environmental and social assessment?

    <p>To justify proposed alternatives and their compliance</p> Signup and view all the answers

    Which of the following factors does the Bank consider when establishing project implementation timeframes?

    <p>The nature and significance of the project</p> Signup and view all the answers

    Which of the following is NOT a requirement for proposals to be considered Associated Facilities?

    <p>Reflection of local community interests</p> Signup and view all the answers

    What does the Bank use to evaluate the justification of alternative performance levels?

    <p>Objectives of the Environmental and Social Standards</p> Signup and view all the answers

    What is the significance of the Environmental and Social Framework (ESF)?

    <p>It sets forth environmental management standards.</p> Signup and view all the answers

    Which of the following describes a responsibility of the Borrower regarding project implementation?

    <p>To prepare and implement projects consistently with EHSGs</p> Signup and view all the answers

    What requirement is essential when Indigenous peoples are affected by a project?

    <p>Free, prior and informed consent (FPIC)</p> Signup and view all the answers

    What is a key component included in the Environmental and Social Commitment Plan (ESCP)?

    <p>Common approach to environmental and social measures</p> Signup and view all the answers

    What is a key objective of the Environmental and Social Standard 8?

    <p>To protect cultural heritage from degradation</p> Signup and view all the answers

    What aspect is NOT required under the General Requirements for environmental and social standards?

    <p>Comprehensive reporting on financial expenditures</p> Signup and view all the answers

    Which section addresses the grievance mechanism within the environmental framework?

    <p>C.Grievance mechanism</p> Signup and view all the answers

    What is the main focus of Environmental and Social Standard 7?

    <p>Supporting Indigenous peoples and local communities</p> Signup and view all the answers

    What does the scope of application refer to in environmental and social standards?

    <p>The types of projects that require environmental assessments</p> Signup and view all the answers

    What requirement is crucial for broader development planning related to Indigenous communities?

    <p>Incorporation of traditional knowledge in decision-making</p> Signup and view all the answers

    What does the Initial section of the environmental and social framework focus on?

    <p>Outlining the structure of the entire framework</p> Signup and view all the answers

    What is a primary mandate of the World Bank Group Strategy 1?

    <p>Ending extreme poverty and promoting shared prosperity</p> Signup and view all the answers

    Which policy does the World Bank Environmental and Social Framework replace?

    <p>OP/BP4.00, Piloting the Use of Borrower Systems</p> Signup and view all the answers

    What essential aspect is recognized by the World Bank as critical in a world of finite natural resources?

    <p>Climate change mitigation and adaptation</p> Signup and view all the answers

    Which operational policy does NOT align with the Environmental and Social Framework?

    <p>OP/BP4.50, Projects in International Waters</p> Signup and view all the answers

    What factors can influence the aspects that are relevant to an overview assessment?

    <p>Type, scale, location, and potential environmental and social risks</p> Signup and view all the answers

    What is a major goal of the World Bank Group's thematic strategies over the coming decade?

    <p>To strengthen environmental sustainability efforts</p> Signup and view all the answers

    What is the relationship between the overview assessment and the Borrower’s ES Framework?

    <p>The overview assessment informs the Bank’s review of the Borrower’s ES Framework.</p> Signup and view all the answers

    Which of the following does the World Bank Group prioritize in its corporate goals?

    <p>Addressing issues of social inclusion</p> Signup and view all the answers

    What is one purpose of the Bank's environmental and social due diligence?

    <p>To evaluate projects proposed for support through Investment Project Financing.</p> Signup and view all the answers

    Who can contact the World Bank Inspection Panel?

    <p>Anyone through e-mail or website</p> Signup and view all the answers

    What is NOT mentioned as a reason for conducting an overview assessment?

    <p>To disclose the assessment findings to the media.</p> Signup and view all the answers

    What does OP/BP4.12 pertain to within the World Bank's policies?

    <p>Involuntary Resettlement</p> Signup and view all the answers

    When should the Bank disclose its intention to conduct the assessment?

    <p>At the earliest possible opportunity.</p> Signup and view all the answers

    What does the assessment process primarily seek to address regarding stakeholders?

    <p>Their views to inform the assessment.</p> Signup and view all the answers

    Which of the following is NOT a component that an overview assessment might evaluate?

    <p>Current project funding sources.</p> Signup and view all the answers

    What will trigger the need for the Bank to review the Borrower’s ES Framework?

    <p>The Borrower's request to use all or part of their ES Framework.</p> Signup and view all the answers

    Study Notes

    ES6 Features Overview

    • ES6, or ECMAScript 2015, significantly improved JavaScript syntax and functionality. These advancements aimed to enhance code readability, maintainability, and the overall developer experience.

    Let and Const Declarations

    • let and const replace var, providing block scope, preventing variable hoisting, and encouraging more predictable behavior.
    • let declares variables that can be reassigned.
    • const declares variables whose values cannot be reassigned. These are intended to hold values that should not change.

    Arrow Functions

    • Arrow functions provide concise syntax for creating functions.
    • They automatically use the surrounding function's this context, simplifying use in callback functions.

    Default Parameters

    • Functions can specify default values for parameters, making them more flexible and able to handle various input scenarios gracefully.
    • If a parameter is not provided, its default value is used.

    Template Literals

    • Template literals create strings that include expressions, enhancing readability by embedding variables and expressions directly in strings, encapsulated in backticks.

    Destructuring

    • Destructuring allows extracting values from arrays or objects into individual variables efficiently.

    Spread Syntax

    • The spread operator (...) copies elements from arrays or properties from objects, aiding in creating copies or merging these data structures.
    • Simplifies manipulation and passing of data sets.

    Classes and Inheritance

    • ES6 introduces classes as reusable object blueprints.
    • Inheritance through extends allows the creation of class hierarchies.
    • Classes provide a structured object-oriented programming approach.

    Promises

    • ES6 Promises robustly handle asynchronous operations, managing asynchronous results and errors systematically.
    • Critically important for managing non-blocking code flow.

    Modules

    • Modules enable importing and exporting code, organizing reusable code blocks into separate files.
    • Essential for large-scale, multi-file projects.

    Enhanced Array Methods

    • ES6 extends array methods to include map, filter, and reduce, performing operations on arrays directly to return new arrays or values.

    Symbols and Sets

    • Symbols create unique identifiers, avoiding clashes with other identifiers and useful for adding internal properties to objects.
    • Sets store unique values, efficiently managing collections of unique values.

    Iterators and For...Of Loops

    • ES6 iterators define a standard way to access values from data structures.
    • For...of loops iterate over data sets directly.
    • Enhancing iteration capabilities within various data structures.

    Map Objects

    • Map objects store key-value pairs, where keys can be of any type.
    • Useful for representing structured data and complex relationships between values.

    Proxies and Reflect

    • Proxies intercept and control operations on objects.
    • Reflect provides static methods for working with object methods.

    instanceof and Symbol.hasInstance

    • ES6 refines object validation against prototypes.
    • Enhanced instanceof and Symbol.hasInstance use cases improve prototype management and usage.

    Additional Improvements/Syntax Changes

    • Multiple catch blocks in a try...catch block provide enhanced error handling.

    Key Themes

    • ES6 features simplify code, enhance readability, and promote robust JavaScript programming practices.

    Generational Change Summary

    • ES6's advancements significantly shift how JavaScript code is structured and maintained, marking a substantial evolution in the language.
    • These improvements exemplify a move away from older problematic approaches towards a more consistent and flexible paradigm.

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    Description

    This quiz covers the key features introduced in ES6 (ECMAScript 2015), including let and const declarations, arrow functions, and default parameters. Explore how these improvements enhance code readability and functionality for JavaScript developers.

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