Experian Marketing Services Software Developer Interview Questions and Answers

Q1. Given the start and end times of the meetings, how can you determine if you are able to attend all of them?
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Q1. How make a queue using a stack
Ans. 
To implement a queue using a stack, use two stacks and simulate the queue operations.
• Use two stacks, one for enqueue operation and one for dequeue operation.

• For enqueue operation, simply push elements onto the stack used for enqueueing.

• For dequeue operation, if the dequeue stack is empty, pop all elements from enqueue stack and push onto dequeue stack.

• Then pop from the dequeue stack to simulate dequeue operation.
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Q2. Create a linked list
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A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.
• Create a Node class with data and next pointer

• Initialize a head pointer to null

• Add nodes by updating next pointers

• Traverse the list by following next pointers
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Q1. How does consumer, producer work in kafka
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Consumers read data from topics, while producers write data to topics in Kafka.
• Consumers subscribe to topics to read messages from them

• Producers publish messages to topics for consumers to read

• Consumers can be part of a consumer group to scale out consumption

• Producers can specify key for messages to control partitioning
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Q1. Basic JavaScript and React.js questions
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Q2. Questions on functions, hooks and DOM
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Q3. Questions on SSR
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Q4. Questions on strings and arrays
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Api related questions

Q1. Easy-Medium level Leetcode questions on linkedlists
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Q2. Simple recursion question
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Q3. An SQL query Basic question in OOPS and resume description..
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Q4. Basic questions regarding SQL
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Q5. Difference between thread and process
Ans. 
A process is an instance of a program while a thread is a subset of a process that can run concurrently with other threads.
• Processes have their own memory space while threads share the same memory space within a process.

• Processes are independent of each other while threads within the same process can communicate with each other.

• Processes are heavier in terms of resource consumption compared to threads.

• Example: A web br...read more
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Q1. Spring security, JWT , Kakfa , Reverse vowels , suffix sum
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Q1. Project Explain
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Project Explain is a question where you are asked to describe a project you have worked on in detail.
• Provide an overview of the project including its purpose and goals

• Explain the technologies used and your role in the project

• Discuss any challenges faced and how they were overcome

• Highlight the outcomes and impact of the project
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