1. What is the purpose of the 'export' keyword in ES6 modules?
A) To import functions from another module
B) To export functions or values from a module
C) To define a module
D) To execute a module
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2. What does the 'import' keyword do in ES6 modules?
A) It imports functions or values from another module
B) It exports functions from the current module
C) It creates a new module
D) It initializes a module
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3. What is the main difference between CommonJS and ES6 modules?
A) CommonJS is synchronous, ES6 is asynchronous
B) CommonJS uses require and module.exports, ES6 uses import and export
C) ES6 modules are not compatible with Node.js
D) CommonJS does not support exports
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4. What is a default export in ES6 modules?
A) A module can export a single value or object
B) A module can export multiple values
C) A module cannot have default exports
D) Default exports are only for classes
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5. What are named exports in ES6 modules?
A) A single value exported from a module
B) Multiple values exported with specific names
C) Only functions can be named exports
D) Named exports cannot be imported
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6. How do ES6 modules differ from CommonJS modules in terms of loading?
A) ES6 modules are asynchronous; CommonJS modules are synchronous
B) Both are synchronous
C) Both are asynchronous
D) CommonJS modules can be used in the browser
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7. Can you have both named exports and a default export in the same module?
A) Yes, you can
B) No, you cannot
C) Only named exports are allowed
D) Only default exports are allowed
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8. What can happen with circular dependencies in ES6 modules?
A) They will work without any issues
B) They may lead to undefined values
C) They will throw an error
D) They are not allowed in ES6 modules
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9. How do you import a default export in ES6 modules?
A) import { value } from 'module'
B) import * from 'module'
C) import value from 'module'
D) import [value] from 'module'
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10. How do you import named exports from a module?
A) import { value1, value2 } from 'module'
B) import value1, value2 from 'module'
C) import [value1, value2] from 'module'
D) import * from 'module'
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11. How can you load ES6 modules in your JavaScript code?
A) Using the 'import' statement
B) Using the 'require' statement
C) Using the 'include' statement
D) Using the 'load' statement
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12. What is a module in JavaScript?
A) A global variable
B) A self-contained block of code that can export and import
C) A collection of functions only
D) A type of object
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13. How do you define a default export in an ES6 module?
A) export default { value }
B) export default functionName()
C) module.exports = functionName
D) exports.default = functionName
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14. Why are named exports called 'named' exports?
A) They must be imported using their exact names
B) They are always imported as default
C) They can have any name during import
D) They are optional
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15. What does the export * from 'module' syntax do?
A) It imports all exports
B) It re-exports all exports from the specified module
C) It exports only the default export
D) It exports a single named export
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16. Why are modules important in JavaScript?
A) They improve code organization and reuse
B) They increase execution speed
C) They prevent all global variables
D) They reduce the need for functions
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17. What file extension do ES6 modules typically use?
A) .mjs
B) .js
C) .module
D) .es6
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18. How can you include an ES6 module in an HTML file?
A)
B)
C)
D)
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19. Why might developers use a bundler with ES6 modules?
A) To write code without modules
B) To combine multiple modules into a single file
C) To create global variables
D) To avoid using any modules
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20. What does the .mjs file extension signify?
A) It is a CommonJS module
B) It is an ES6 module
C) It is a script file
D) It is a CSS file
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