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Virgo Group Interview Questions and Answers
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...
read moreTo 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
Q2. Healthcare automation way
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
Q3. What is singleton class and its implementation
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.
Q4. Find all the pairs with given sum coding
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.
Q5. Internal working of hashmap
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
Q6. What are the strengths and weakness
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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