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Virgo Group Interview Questions and Answers

Updated 21 Nov 2024
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Q1. How would you scale up your application ?,if it fails on one instances how would you know where did it fail, explain has a relationship with real world example and write a code in java representative of the sam...

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Ans.

To scale up application, use load balancers and monitor logs to identify failures.

  • Use load balancers to distribute traffic across multiple instances

  • Monitor logs to identify where the failure occurred

  • Implement fault tolerance and redundancy to prevent future failures

  • Use auto-scaling to automatically add or remove instances based on traffic

  • Real-world example: Amazon Web Services (AWS) uses load balancers and auto-scaling to handle millions of requests

  • Code example: Use try-catch...read more

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Q2. Healthcare automation way

Ans.

Healthcare automation involves using technology to streamline processes and improve efficiency in the medical field.

  • Implementing electronic health records (EHR) systems to digitize patient information

  • Utilizing telemedicine for remote consultations and monitoring

  • Automating appointment scheduling and reminders

  • Integrating AI algorithms for medical imaging analysis

  • Developing mobile apps for patient engagement and monitoring

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Q3. What is singleton class and its implementation

Ans.

Singleton class is a class that can only have one instance and provides a global point of access to it.

  • Singleton class restricts the instantiation of a class to one object.

  • It provides a way to access its unique instance globally.

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

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Q4. Find all the pairs with given sum coding

Ans.

The task is to find all pairs in an array that add up to a given sum.

  • Iterate through the array and store each element in a hash set.

  • For each element, check if the difference between the sum and the element exists in the hash set.

  • If it does, add the pair to the result list.

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Q5. Internal working of hashmap

Ans.

HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.

  • HashMap internally uses an array of linked lists to store key-value pairs.

  • When a key-value pair is added, the key is hashed to find the index in the array where it will be stored.

  • If multiple keys hash to the same index, a linked list is used to handle collisions.

  • HashMap allows one null key and multiple null values.

  • The initial capacity and load factor can be specified when c...read more

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Q6. What are the strengths and weakness

Ans.

Strengths include strong analytical skills and attention to detail. Weaknesses may include difficulty with public speaking and time management.

  • Strengths: strong analytical skills

  • Strengths: attention to detail

  • Weaknesses: difficulty with public speaking

  • Weaknesses: time management

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