TM Systems Wordpress Developer Interview Questions and Answers

Q1. Java questions and basics of testing
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There was an online test which has MCQs. Had technical questions from java, microservices, springboot, rdbms

Q1. An unsorted array has numbers. Find the duplicate numbers and return the array.
Ans. 
Find duplicate numbers in an unsorted array and return the array.
• Iterate through the array and keep track of seen numbers using a hash table.

• If a number is already in the hash table, it is a duplicate.

• Add the duplicate number to a new array and return it.
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Q2. Java 8 features, method reference, write consumer, lambda expression. SOLID principles. Design patterns. Write thread safe singleton with performance.
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Q3. AWS related questions. SQS. Dynamo. AWS API gateway.
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Q4. REST principles.
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Q5. Inheritance tricky questions. Collections tricky questions.
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Q6. Deep copy vs Shallow copy.
Ans. 
Deep copy creates a new object with its own memory, while shallow copy creates a new reference to the same memory.
• Deep copy duplicates the object and all of its contents, while shallow copy only duplicates the object itself.

• Deep copy is more memory-intensive than shallow copy.

• In Python, deep copy can be achieved using the copy.deepcopy() method, while shallow copy can be achieved using the copy.copy() method.
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Q7. Comparator with and without java 8
Ans. 
Comparator in Java 8 provides default methods and lambda expressions for sorting.
• Comparator in Java 8 can be implemented using lambda expressions.

• Comparator in Java 8 provides default methods like reversed() and thenComparing() for sorting.

• Comparator in pre-Java 8 versions can be implemented using anonymous inner classes.

• Comparator in pre-Java 8 versions requires more code to implement compared to Java 8.

• Example: Sorti...read more
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Q1. Explain design patterns you know
Ans. 
Design patterns are reusable solutions to common software problems.
• Creational patterns: Singleton, Factory, Abstract Factory

• Structural patterns: Adapter, Decorator, Facade

• Behavioral patterns: Observer, Strategy, Command

• Architectural patterns: Model-View-Controller, Model-View-ViewModel

• Concurrency patterns: Thread Pool, Producer-Consumer

• Examples: Singleton ensures only one instance of a class exists, Factory creates obj...read more
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Q2. Explain the usage of that particular design pattern
Ans. 
The design pattern is used to solve a specific problem in software development.
• Design patterns are reusable solutions to common problems in software development.

• They provide a standard way to solve a problem that can be adapted to different situations.

• Examples of design patterns include Singleton, Factory, Observer, and Decorator.

• Using design patterns can improve code quality, maintainability, and scalability.
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Q3. Write code for that design pattern
Ans. 
Factory Method Pattern
• Defines an interface for creating objects, but lets subclasses decide which class to instantiate

• Encapsulates object creation logic to a separate class

• Useful when a class can't anticipate the type of objects it needs to create

• Example: java.util.Calendar.getInstance()

• Example: javax.xml.parsers.DocumentBuilderFactory.newInstance()
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Q4. What are the java8 features
Ans. 
Java8 features include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow functional programming and simplify code.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to process collections of data in a functional way.

• Default methods allow interfaces to have method implementations.

• Other features include the Date and Time API, Nashorn JavaScript
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10 min aptitude test

3 coding problem to solve on hackerrank

Multiple choice test

Q1. Technical interview
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Q1. HR discussion and salary negotiations
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Q1. Hashmap, linkedlist, arraylist, collection interface
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Q2. Small coding questions on collection interface
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Q1. Managerial round, questions were on certain scenarios like production issues and how to handle them
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Q1. Relocation, salary discussion
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Level 0 aptitude questions were present

Q1. Java sql and questions based on core is asked
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Q1. Short term and long term goals , and other regular questions
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Q1. Microcontrollers, Protocols, Interfaces, etc.
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Q1. Digital circuits, micro processor interfaces, protocols, previous projects, etc.
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Q1. What are your strengths and weaknesses?
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Q2. Where do you see yourself in 5 years?
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Q3. Tell me about yourself.
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Q4. Why are you looking for a change?
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Q1. .Net, MVC, OOPS, SQL questions technical round of one hour
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Q1. Manager Round of 1 hour
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Q1. Tell me about yourself.
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Q2. Why are you looking for a change?
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Q3. Share details of your previous job.
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Q4. What are your salary expectations?
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