In a Write-Around caching strategy, the data is written directly to the ______, bypassing the cache.
- Disk
- Server
- Database
- RAM
In a Write-Around caching strategy, the data is written directly to the database, bypassing the cache. This strategy is useful for data that doesn't need to be immediately cached, such as rarely accessed data or large files.
In a RESTful API, which HTTP method corresponds to the Update operation in CRUD?
- GET
- POST
- PUT
- DELETE
In a RESTful API, the PUT HTTP method corresponds to the Update operation in CRUD (Create, Read, Update, Delete). It is used to update or modify an existing resource on the server.
Why is it advantageous to use stubbing when dealing with external services or APIs in tests?
- Stubbing allows you to make actual API calls during testing.
- Stubbing provides better performance in tests.
- Stubbing isolates your tests from the external services, making tests more reliable and faster.
- Stubbing is required by external services for testing.
It is advantageous to use stubbing when dealing with external services or APIs in tests because stubbing isolates your tests from the actual external services, making tests more reliable and faster. With stubbing, you can control the responses from external services, ensuring that your tests are not affected by changes or issues with the real services. Options (1), (2), and (4) do not accurately describe the advantages of stubbing in this context.
When publishing a package to the NPM registry, what file is crucial to define the package properties and dependencies?
- package-config.json
- dependencies.json
- package-lock.json
- package.json
When publishing a package to the NPM registry, the package.json file is crucial. This file contains metadata about the package, including its name, version, description, entry points, and most importantly, its dependencies. The package-lock.json file is used to lock dependency versions but is not responsible for defining the package properties. Options 1 and 2 do not exist, and option 3, while related, is not used for defining package properties.
You need to expose a global utility function that should be accessible across different modules in your Node.js application. How would you leverage the global object to achieve this?
- global.utility = require('./utility');
- global.util = require('./utility');
- global.import('./utility')
- global.include('./utility')
To expose a global utility function in Node.js, you can use global.utility = require('./utility');. This allows you to require the module once and make it accessible globally across different modules. The other options do not achieve this in the correct way.
When would you use export default over named exports in a module?
- export default is used when you want to export multiple values from a module as an object with named keys.
- export default is used when you want to export a single value, function, or class from a module.
- export default is used when you want to export a module without specifying a name for it.
- export default is used when you want to create a private module that can't be imported from other modules.
export default is used when you want to export a single value, function, or class as the default export of a module. This allows you to import it using any name you prefer when importing. Named exports are used when you want to export multiple values with specific names.
What does the return statement do in a JavaScript function?
- Returns a value from the function and exits the function
- Declares a variable
- Creates a loop
- Includes a comment in the code
The return statement in a JavaScript function is used to return a value from the function and immediately exit the function. It is used to send data back to the caller of the function. The other options do not describe the purpose of the return statement.
You are integrating ESLint into a legacy project. How would you approach linting the existing codebase without disrupting the development workflow?
- Lint the entire codebase in one go and fix all issues immediately.
- Gradually introduce ESLint, starting with new code and addressing legacy code issues incrementally.
- Disable ESLint for the legacy code and only apply it to new code.
- Ignore linting in legacy projects as it can't be easily integrated.
To avoid disruption, it's best to gradually introduce ESLint. Start by applying it to new code and address legacy code issues incrementally. Linting the entire codebase at once might be overwhelming and disruptive. Disabling ESLint for legacy code or ignoring it is not a recommended approach for maintaining code quality.
What happens to the Event Loop when the callback queue and the task queue are both not empty?
- It suspends the Event Loop until both queues are empty.
- It processes callbacks from the callback queue before tasks from the task queue.
- It processes tasks from the task queue before callbacks from the callback queue.
- It randomly selects items to process from both queues.
When both the callback queue and the task queue are not empty, the Event Loop in Node.js follows a specific order. It first processes callbacks from the callback queue before moving to tasks from the task queue. This order ensures that callback functions, which often include I/O operations, are handled promptly.
Which of the following array methods does not mutate the original array in JavaScript?
- splice()
- push()
- concat()
- pop()
The concat() method in JavaScript creates a new array that combines the elements of the original array and the elements passed as arguments, without modifying the original array. The other methods, such as splice(), push(), and pop(), directly modify the original array.