Wunderman Thompson Commerce Interview Questions and Answers

Q1. What is MVC, and how magento uses MVC
Ans. 
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 mo...read more
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Q2. Ways to create a custom attribute in magento Product, Customer and Sales.
Ans. 
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 ...read more
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Q3. What is the difference in product, customer and sales entity. Also do these all have EAV ?
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Q4. What is the Mview file usage and what are the indexing techniques.
Ans. 
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.
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Q1. Magento2 config ways, Also how we can set config so at time of deployment in multiple environments it auto update magento.
Ans. 
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 An...read more
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Q2. What caching techniques magento uses, and how we can control them.
Ans. 
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 ca...read more
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Q3. What is Redis cache, and how we can modify / clear a customer based cache.
Ans. 
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'.
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Q4. What is the use of composer.json and composer.lock
Ans. 
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 s...read more
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Q5. Steps to make packaging an magento module as a global package to use in composer require.
Ans. 
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 P...read more
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Round duration - 50 Minutes
Round difficulty - Medium

there were two coding question in first round.

Q1. 
Doctor Ninja's House Problem Statement
In a network of 'N' cities with 'M' paths connecting them, Doctor Ninja aims to purchase a house in a city 'X' such that it is possible to reach every other city fro...read more
Ans. 
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.
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Round duration - 30 Minutes
Round difficulty - Medium

1 coding question of scrambled string.

Q1. 
Scramble String Problem Statement
You are given an integer 'N' and two strings S and R, each having the size N. Determine if you can scramble string S to obtain string R using specified operations.
Your ...read more
Ans. 
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.
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Round duration - 30 Minutes
Round difficulty - Easy

oops and some sql queries

Round duration - 20 Minutes
Round difficulty - Easy

HR round

Q1. MIM, CM, PM, IM, ITIL, Service Life Cycle, Project Management related questions
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Q1. What are your salary expectations?
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Q2. Why should we hire you?
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Q3. Why are you looking for a change?
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Q4. Where do you see yourself in 5 years?
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Q5. What are your strengths and weaknesses?
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Q6. Values that you bring on table for Wunderman
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions around Java.

Q1. What is the difference between @RestController and @Controller in Spring?
Ans. 
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 respons...read more
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Q2. 
Swap Two Numbers Without Using a Third Variable
Your task is to swap two given numbers without utilizing an additional variable and print the swapped values.
Input:
The first line contains an integer 't...read more
Ans. 
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.
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Q3. What is the Singleton Design Pattern?
Ans. 
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 da...read more
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.