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When implementing file uploads in a serverless architecture, it is often beneficial to use ______ to handle file processing and transformations.

  • AWS Lambda
  • Docker Containers
  • Kubernetes
  • AWS S3
When implementing file uploads in a serverless architecture, it is often beneficial to use "AWS Lambda" to handle file processing and transformations. AWS Lambda allows you to execute code in response to events and can be triggered by file uploads. Docker containers and Kubernetes are containerization technologies, and AWS S3 is a storage service, but they are not typically used for serverless file processing.
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In Mocha, to perform cleanup activities after all the test cases in a suite have run, the ______ hook is used.

  • after
  • afterEach
  • teardown
  • suiteTeardown
In Mocha, the after hook is used to perform cleanup activities after all the test cases in a suite have run. It runs once after all test cases within the suite. The other options (afterEach, teardown, and suiteTeardown) represent different hook names or are not used for this specific purpose in Mocha.
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Why might a developer list a package as a devDependency instead of a dependency?

  • A devDependency is needed only during development, not in production.
  • A devDependency is automatically updated more frequently than a regular dependency.
  • A devDependency reduces the overall bundle size of the application.
  • A devDependency allows other developers to contribute to the project.
Developers list a package as a devDependency when it's required during development but not needed in production. This helps to keep the production build smaller and avoids unnecessary dependencies.
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You are developing an Express application that requires user authentication. How do you ensure that user credentials are secured, and sessions are managed effectively across different routes?

  • Use a secure authentication library like Passport.js, store user credentials securely by hashing and salting passwords, and implement session management with the express-session middleware.
  • Store user credentials in plain text for simplicity, use client-side storage for session management, and avoid encrypting sensitive data to reduce overhead.
  • Implement a custom authentication mechanism using base64 encoding for user credentials, and manage sessions by storing them in a global JavaScript object.
  • Use HTTP Basic Authentication for user login and manage sessions by storing user information in cookies without encryption.
To ensure secure user authentication and session management in an Express application, it's crucial to use a secure authentication library like Passport.js, securely store user credentials, and utilize a trusted session management middleware like express-session. Options 2, 3, and 4 are insecure and not recommended practices.
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You have a PHP script and you are getting an error when trying to perform a miscellaneous task using a PHP function. How would you troubleshoot this issue?

  • Check the error message returned by the error_get_last() function and review the function usage
  • Update the PHP version and related extensions
  • Reinstall PHP interpreter
  • All of the above
To troubleshoot an error when using a miscellaneous function in PHP, you can check the error message returned by the error_get_last() function. This function retrieves the last PHP error message. Reviewing this error message can provide insights into the issue that occurred during the function execution. Additionally, you can consider updating the PHP version and related extensions or reinstalling the PHP interpreter if the issue persists. By following these troubleshooting steps, you can identify and resolve the error encountered while performing a miscellaneous task using a PHP function.
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In PHP, the fopen() function is used to open a file.

  • TRUE
  • FALSE
  • nan
  • nan
Yes, in PHP, the fopen() function is used to open a file. It takes the path to the file and the mode as parameters, and it returns a file handle or file pointer that can be used for further file operations.
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What are some of the uses of class constants in PHP OOP?

  • Storing configuration
  • Defining error codes
  • Enum-like values
  • All of the above
Class constants in PHP OOP have various uses, including storing configuration values that remain constant throughout the execution of the script, defining error codes for consistent error handling, and creating enum-like values to represent a fixed set of options. Class constants provide a way to encapsulate and reuse such values within a class or across different instances of the class. For further information, visit: http://php.net/manual/en/language.oop5.constants.php
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You have a string in your PHP script and you want to find out how many characters it has. How would you do this?

  • strlen($string)
  • count($string)
  • length($string)
  • characters($string)
To find out the number of characters in a string in PHP, you can use the strlen() function. The strlen() function returns the length of a string in terms of the number of characters. Simply pass the string as an argument to strlen() like this: strlen($string). The function will return the length of the string, which corresponds to the number of characters. Learn more: https://www.php.net/manual/en/function.strlen.php
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What are the functions to be used to get the image's properties (size, width, and height)?

  • The functions 'getimagesize()', 'imagesx()', and 'imagesy()'
  • The functions 'imagesize()', 'imgwidth()', and 'imgheight()'
  • The functions 'size()', 'width()', and 'height()'
  • The functions 'getsize()', 'getwidth()', and 'getheight()'
To get the properties of an image such as size, width, and height in PHP, you can use the following functions: - 'getimagesize()' returns an array containing the size, width, height, and other attributes of the image. - 'imagesx()' returns the width of the image. - 'imagesy()' returns the height of the image. These functions are part of the GD library and are commonly used for image processing and manipulation in PHP.
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What function do you use in PHP to execute a query against a MySQL database?

  • mysqli_query()
  • mysql_query()
  • pdo_query()
  • execute_query()
In PHP, you can use the mysqli_query() function to execute a query against a MySQL database. This function takes two parameters: the connection object and the SQL query you want to execute. The SQL query can be any valid MySQL statement, such as SELECT, INSERT, UPDATE, or DELETE. The mysqli_query() function returns a result object for successful SELECT queries or a boolean value for other types of queries. It's important to use prepared statements or proper escaping techniques to prevent SQL injection vulnerabilities when executing user-supplied data as part of the query.
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In PHP, the str_replace() function is case-sensitive.

  • TRUE
  • FALSE
This statement is true. By default, the str_replace() function in PHP is case-sensitive. It performs replacements in a case-sensitive manner, meaning that the search for the specified string is case-sensitive. If you want to perform case-insensitive replacements, you would need to use the str_ireplace() function instead. Learn more: https://www.php.net/manual/en/function.str-replace.php
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What is the purpose of the array_shift() function in PHP?

  • To remove and return the first element of an array
  • To add an element to the end of an array
  • To sort the elements of an array
  • To reverse the order of elements in an array
The array_shift() function in PHP is used to remove and return the first element of an array. It modifies the original array by removing the first element and returns that element. This function is useful when you need to retrieve and remove the first element from an array. Learn more: http://php.net/manual/en/function.array-shift.php
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