FDM Group Interview Questions and Answers

Average to easy difficulty level.

Q1. Java code of string manipulation
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Q2. What is the Java code for various types of sorting algorithms?
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Q3. Sql query and topics related to joins.
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Q1. About yourself and family
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Q2. What do you know about the company?
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Q3. Can you provide examples of real-life scenarios where you handled conflicts with either a colleague or a manager?
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Q4. What actions would you take if your manager does not approve your product idea, and how would you attempt to persuade them?
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Q1. What is the Singleton pattern ? in how many ways can this pattern be broken ?
Ans. 
Singleton pattern ensures a class has only one instance and provides a global point of access to it.
• Singleton pattern can be implemented by making the constructor private and providing a static method to access the instance.

• The pattern can be broken by using reflection to access the private constructor and create multiple instances.

• Another way to break the Singleton pattern is by using multiple class loaders in Java.

• Th...read more
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Q2. What is the internal implementation of hashmap? Let's assume that you want to store duplicate keys in the hashmap, how can we achieve the same in hashmap ?
Ans. 
HashMap internally uses an array of linked lists to store key-value pairs. To store duplicate keys, we can use a custom implementation of HashMap.
• HashMap internally uses an array of linked lists to handle collisions.

• To store duplicate keys, we can create a custom HashMap implementation that allows multiple values for the same key.

• One approach is to use a HashMap with values as lists, where each key can have multiple va
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Q1. What microservices patterns are you aware ? let's assume that there is a microservice based architecture and service A is calling service B which in turn service C. If service b fails, how will you manage ...read more
Ans. 
Use compensating transactions and distributed tracing for managing transaction and logging in case of service B failure.
• Implement compensating transactions to rollback changes made by service B in case of failure.

• Use distributed tracing to track the flow of requests and identify where the failure occurred.

• Implement retry mechanisms to handle transient failures in service B.

• Use circuit breakers to prevent cascading fail...read more
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Q2. System Design question : Design a booking wesite for.eg: bookin.com ?
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The Aptitude Test session accesses mathematical and logical reasoning abilities

Q1. What is Vlookup
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Q2. Some IF else Question in Excel
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Q3. What does your day in your previous organization look like?
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Q4. Could you share the technical skills you possess?
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Q5. Can you explain what a Pivot Table is?
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Q6. Find the Highest-paid employee in each department along with their salary and department name.
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