Interview Questions and Answers for 'Bloomberg' | Search Interview Question

Interview Questions and Answers for 'Bloomberg' - 14 question(s) found - Order By Rating

Q1. Can you explain any of your project bug for which you had to struggle a lot ?

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Q2. What is immutability and What are it's disadvantages ?

Design

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Q3. What are the disadvantages of Design Patterns ?

Design Pattern

Ans. 1. Design patterns are abstraction heavy and hence sometimes creates memory and performance overheads.

2. Sometimes they create unnecessary complexity without much added advantage.

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Q4. Design a Whats app like messaging application.

architecture

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Q5. Given a String with letters , numbers and special characters , extract Tokens from it. The rules for Token extraction are ac follows

1. Should for token of all characters till a number or special character is found
2. Should form token of all numbers till a character or special character is found
3. Special character in itself is a token
4. Ignore white spaces

For example - Bob Said "He is here"

should result in

Bob A
Said A
" S
He A
is A
here A
" S

where a is specifying alphabet and S as special character

Design

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Q6. Tell something about Dependency Injection and it's drawbacks. In which situation, you may not like to use dependency injection ?

Design

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Q7. Design a Program to clone an object and all it's children.

Design

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Q8. Which data structure would you use to implement LRU cache and Why ? Can you tell me the time complexity for it ?

Algorithm

Ans. We can use LinkedHashMap as it will give time complexity of O(1) for lookup and We can maintain the insertion order to identify the Last used elements for eviction.

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Q9. How can you identify Performance issues before going to production ?

General

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Q10. What are the challenges you faced in any of your project ?

General

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Frequently asked in high end product companies.

Q11. Write code for LRU Cache

Core Java

Ans. https://www.geeksforgeeks.org/lru-cache-implementation/

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_{Like Discuss Correct / Improve cache LRU cache coding code Asked in 10 Companies intermediate}

Q12. What is RMI ?

Ans. RMI stands for Remote Method Invocation. Traditional approaches to executing code on other machines across a network have been confusing as well as tedious and error-prone to implement. The nicest way to think about this problem is that some object happens to live on another machine, and that you can send a message to the remote object and get a result as if the object lived on your local machine. This simplification is exactly what Java Remote Method Invocation (RMI) allows you to do.

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Asked multiple times in Capgemini.

Q13. Why Char array is preferred over String for storing password?

Core Java

Ans. String is immutable in java and stored in String pool. Once it's created it stays in the pool until unless garbage collected, so even though we are done with password it's available in memory for longer duration and there is no way to avoid it. It's a security risk because anyone having access to memory dump can find the password as clear text.

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_{Like Discuss Correct / Improve java string class string immutable immutability string pool garbage collection advanced Asked in 6 Companies Expert}

Q14. Which Software Development methodology is being used in your current Job ?

General

Ans. We are using Agile methodology. I attend daily stand up where the development leads takes the status of assigned stories, achievements, any bottlenecks or challenges. We follow iteration of 2 weeks.

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