Desarrollador De Java Core Interview Questions

248 desarrollador de java core interview questions shared by candidates

Write a program to find all the words from an input block of letters. The program should output a list of valid words in an output file : words.txt. Words can be found in any direction, i.e. left to right, top to bottom, right to left, bottom to top, diagonal, reverse diagonal etc. Sample Input TAMHAT AIRQDR MONCRT EDRTCR Sample Output (words.txt) MAT HAT AIR TAME TINT Take into consideration how the algorithm will perform for large input blocks and number of recognized words. Instructions 1. No Questions to be asked 2. Assume where necessary. Document and supply your assumptions along with the submission. 3. Submit your program code in a zipped format 4. Code submitted should work in Java 6 5. If you reference any external jars, provide a maven build to download the necessary dependencies and compile the project. 6. Document your submission. Extent of your documentation is your choice. At the minimum, instructions to run the program must be supplied 7. How you package the code and present it for our review is left to your choice.

Write a program to find all the words from an input block of letters. The program should output a list of valid words in an output file : words.txt. Words can be found in any direction, i.e. left to right, top to bottom, right to left, bottom to top, diagonal, reverse diagonal etc. Sample Input TAMHAT AIRQDR MONCRT EDRTCR Sample Output (words.txt) MAT HAT AIR TAME TINT Take into consideration how the algorithm will perform for large input blocks and number of recognized words. Instructions 1. No Questions to be asked 2. Assume where necessary. Document and supply your assumptions along with the submission. 3. Submit your program code in a zipped format 4. Code submitted should work in Java 6 5. If you reference any external jars, provide a maven build to download the necessary dependencies and compile the project. 6. Document your submission. Extent of your documentation is your choice. At the minimum, instructions to run the program must be supplied 7. How you package the code and present it for our review is left to your choice.

While the interview questions were basic, these were not the answers you might be remembering or having only one correct answer. HTTP Codes, RestAPI design, database query on tree and recursion, Code analysis on switch case, etc and other past experience questions.
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Software Engineer Core Java

Interviewed at Syndigo

3.8
Jun 27, 2023

While the interview questions were basic, these were not the answers you might be remembering or having only one correct answer. HTTP Codes, RestAPI design, database query on tree and recursion, Code analysis on switch case, etc and other past experience questions.

1. Tell me something about you? 2. Tell some your skills ? 3. Explain internal working of Treemap? 4. following above question , What is self balanced tree ,& Binery tree? explain how it is work and how it is used in TreeMap. 5.Why we need Callable interface? tell something about Future? 6. where do you used the multithreading in your project? why do you used it? 2nd round(Manager) 1. we have map ,and we have put these values , how many element would be there in map? 2.How you can access service from component?(angular2+) 3. how you can call any api from service?(angular2+) 4. what is payload? 5. Full form of JSON and Rest? 6. give some example of JSON? 7. IS it important to put all key and value inside "" this mark?(JSON) 8. Do you remeber any jar that convert the given object into Json? 9.how you can retrieve back the key of given value from map if you forget the key? 10. what collection will you use to cache all the data of Employee table? 11. how you will create REST API in Spring rest/Spring boot? 12. what happen if two different developer use the same END point url while creating the REST api? 13. sql - suppose you have employee table , any you have to find out how many male and female are working. than write sql to find it. 14. sql. now find out male and female count based on city that working on company?
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Core Java Developer

Interviewed at UBS

3.7
Aug 20, 2018

1. Tell me something about you? 2. Tell some your skills ? 3. Explain internal working of Treemap? 4. following above question , What is self balanced tree ,& Binery tree? explain how it is work and how it is used in TreeMap. 5.Why we need Callable interface? tell something about Future? 6. where do you used the multithreading in your project? why do you used it? 2nd round(Manager) 1. we have map ,and we have put these values , how many element would be there in map? 2.How you can access service from component?(angular2+) 3. how you can call any api from service?(angular2+) 4. what is payload? 5. Full form of JSON and Rest? 6. give some example of JSON? 7. IS it important to put all key and value inside "" this mark?(JSON) 8. Do you remeber any jar that convert the given object into Json? 9.how you can retrieve back the key of given value from map if you forget the key? 10. what collection will you use to cache all the data of Employee table? 11. how you will create REST API in Spring rest/Spring boot? 12. what happen if two different developer use the same END point url while creating the REST api? 13. sql - suppose you have employee table , any you have to find out how many male and female are working. than write sql to find it. 14. sql. now find out male and female count based on city that working on company?

DSA (45 Mins): I was asked two standard array/string manipulation questions: Relative Ranks: Given an array of scores, assign ranks ("Gold", "Silver", "Bronze", "4", "5", etc.) based on the score value. (Requires sorting and mapping). Valid Anagram: Check if two strings contain the exact same characters with the same frequencies. (Requires Hash Maps or sorting). Technical/Project: "Why did you choose this framework...", "How would you optimize X feature...", and a deep dive into the source code of my take-home project. Behavioral: Standard questions about conflict resolution and team dynamics.
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Core Developer

Interviewed at Africa to Silicon Valley

3.7
Dec 10, 2025

DSA (45 Mins): I was asked two standard array/string manipulation questions: Relative Ranks: Given an array of scores, assign ranks ("Gold", "Silver", "Bronze", "4", "5", etc.) based on the score value. (Requires sorting and mapping). Valid Anagram: Check if two strings contain the exact same characters with the same frequencies. (Requires Hash Maps or sorting). Technical/Project: "Why did you choose this framework...", "How would you optimize X feature...", and a deep dive into the source code of my take-home project. Behavioral: Standard questions about conflict resolution and team dynamics.

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