10+ Kranjan Enterprises Interview Questions and Answers

Magento2 config can be set via XML files, database, or environment variables. Configuration can be automatically updated during deployment using tools like Ansible or Jenkins.

• Magento2 configuration can be set via XML files in the app/code/[Vendor]/[Module]/etc directory

• Configuration can also be set in the database using the core_config_data table

• Environment variables can be used to set configuration values

• Tools like Ansible or Jenkins can be used to automatically update confi...read more

The task is to find a city 'X' from which all other cities can be reached in a given graph.

• Find the mother vertices in the graph.

• If there are multiple mother vertices, return the minimum value.

• If there are no mother vertices, return -1.

The question asks to determine if string 'R' can be obtained by scrambling string 'S' using certain operations.

• The length of both strings 'S' and 'R' should be the same.

• The operations can be applied recursively on the substrings of 'S'.

• If the length of 'S' is 1, the scrambling process stops.

• The strings only contain lowercase letters.

Swapping two numbers without using a third variable in Java.

• Use bitwise XOR operation to swap the numbers without using a third variable.

• a = a XOR b; b = a XOR b; a = a XOR b; will swap the values of a and b.

• Ensure to handle edge cases like when a and b are the same number.

MVC stands for Model-View-Controller. Magento uses MVC architecture to separate business logic, presentation, and user input.

• Model represents the data and business logic

• View represents the presentation layer

• Controller handles user input and updates the model and view accordingly

• Magento uses the layout XML files to define the view layer

• Magento's controllers are responsible for handling requests and responses

• Magento's models are responsible for interacting with the database and...read more

Mview files are used for indexing in Magento. Indexing techniques include full, partial, and delta indexing.

• Mview files are used to store data for indexing purposes.

• Full indexing updates all data in the index, while partial indexing updates only specific data.

• Delta indexing updates only the data that has changed since the last indexing.

• Indexing can be done manually or automatically based on a schedule or trigger.

Magento uses various caching techniques to improve performance. We can control them through configuration settings.

• Magento uses full page caching, block caching, and session caching.

• Full page caching stores the entire page in cache to reduce server load.

• Block caching stores individual blocks of content in cache to reduce database queries.

• Session caching stores session data in cache to reduce database queries.

• Caching can be controlled through configuration settings in the admi...read more

Redis cache is an in-memory data structure store that can be used as a database, cache, and message broker.

• Redis cache is used to speed up the performance of web applications by storing frequently accessed data in memory.

• To modify or clear a customer based cache, we can use Redis commands like DEL, KEYS, and FLUSHDB.

• For example, to clear a customer's cache, we can use the command 'DEL customer:123'.

Custom attributes can be created in Magento Product, Customer and Sales.

• For Product: Use Magento's setup script to create a custom attribute.

• For Customer: Use Magento's customer setup script to create a custom attribute.

• For Sales: Use Magento's sales setup script to create a custom attribute.

• Custom attributes can also be created programmatically using Magento's API.

• Attributes can be added to attribute sets and used in product listings and filters.

composer.json defines dependencies and composer.lock ensures their versions are consistent.

• composer.json lists the dependencies required by the project

• composer.lock ensures that the versions of the dependencies remain consistent across different environments

• composer.lock is generated automatically when dependencies are installed or updated

• composer.json can be manually edited to add or remove dependencies

• composer.lock should be committed to version control to ensure consistent...read more

To make a Magento module a global package for Composer, follow these steps:

• Create a composer.json file in the root directory of the module

• Specify the name, version, and type of the package in the composer.json file

• Add the module's files to the 'src' directory

• Create a 'vendor' directory in the module's root directory

• Run 'composer install' to generate the vendor/autoload.php file

• Publish the package to a repository like Packagist

• Use 'composer require' to install the package in o...read more

The main difference is that @RestController is a specialized version of @Controller that is used for RESTful web services.

• RestController is used for creating RESTful web services, while Controller is used for handling web requests in a traditional MVC application

• RestController eliminates the need for annotating each method with @ResponseBody as it is done automatically

• RestController returns data directly in the response body, while Controller returns the name of the view to r...read more

Answering questions related to business consulting and requirements gathering.

• Requirement Gap Document is a crucial tool for identifying gaps between current and desired states.

• Achievements include successful implementation of ERP systems and streamlining business processes.

• Changed company for growth opportunities and to expand domain knowledge.

• Tools for requirement gathering include interviews, surveys, and workshops.

• Agile methodology followed in previous company with daily ...read more

Singleton Design Pattern ensures a class has only one instance and provides a global point of access to it.

• Ensures a class has only one instance by providing a global access point to it.

• Uses a private constructor to restrict instantiation of the class from other classes.

• Provides a static method to access the single instance of the class.

• Commonly used in scenarios where only one instance of a class is needed, such as database connections or configuration settings.

Cookies and cache are both used to store data, but cookies are stored on the client side while cache is stored on the server side. Agile methodologies are a set of principles and ceremonies used in software development.

• Cookies are small text files that are stored on the client's computer by a website. They are used to remember user preferences and login information.

• Cache is a temporary storage area on the server that stores frequently accessed data to reduce server load and i...read more

Swapping 2 numbers without using a third variable in Java

• Use addition and subtraction to swap the values

• Use XOR operator to swap the values

• Use multiplication and division to swap the values

The @Controller annotation is used to create a controller class for handling HTTP requests, while @RestController is used for RESTful web services.

• The @Controller annotation is used for traditional web applications that return HTML views.

• The @RestController annotation is used for creating RESTful web services that return JSON or XML data.

• The @RestController annotation is a combination of @Controller and @ResponseBody annotations.

• Both annotations are used to handle HTTP reques...read more