NTT L2 Engineer Interview Questions and Answers

Q1. Database Management system SQL and PlSQL
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Q2. C Language and C++ Language And Data base Management system SQL and PlSQL and Java
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Q3. Database Management system
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Q4. Sql ad PlSQL Mango Data For Loop and While loop
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Q5. C language andC ++ Language and Java
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There was an online test which has MCQs. Had technical questions from java, microservices, springboot, rdbms

Q1. An unsorted array has numbers. Find the duplicate numbers and return the array.
Ans. 
Find duplicate numbers in an unsorted array and return the array.
• Iterate through the array and keep track of seen numbers using a hash table.

• If a number is already in the hash table, it is a duplicate.

• Add the duplicate number to a new array and return it.
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Q2. Java 8 features, method reference, write consumer, lambda expression. SOLID principles. Design patterns. Write thread safe singleton with performance.
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Q3. AWS related questions. SQS. Dynamo. AWS API gateway.
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Q4. REST principles.
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Q5. Inheritance tricky questions. Collections tricky questions.
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Q6. Deep copy vs Shallow copy.
Ans. 
Deep copy creates a new object with its own memory, while shallow copy creates a new reference to the same memory.
• Deep copy duplicates the object and all of its contents, while shallow copy only duplicates the object itself.

• Deep copy is more memory-intensive than shallow copy.

• In Python, deep copy can be achieved using the copy.deepcopy() method, while shallow copy can be achieved using the copy.copy() method.
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Q7. Comparator with and without java 8
Ans. 
Comparator in Java 8 provides default methods and lambda expressions for sorting.
• Comparator in Java 8 can be implemented using lambda expressions.

• Comparator in Java 8 provides default methods like reversed() and thenComparing() for sorting.

• Comparator in pre-Java 8 versions can be implemented using anonymous inner classes.

• Comparator in pre-Java 8 versions requires more code to implement compared to Java 8.

• Example: Sorti...read more
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Level 0 aptitude questions were present

Q1. Java sql and questions based on core is asked
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Q1. Short term and long term goals , and other regular questions
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Quantitative,reasoning,verbal

Q1. Based on your opinion
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Q1. Simple intro , FAQ ,favourite subject,python basics
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Q1. Hii mam/sir gud evng my name is sony am from peddaplli distc my qualification is mba
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Q2. Hiii sir or mam gud evng my name is sony am from peddaplli distc my qualification is MBA am a fresher and I have no any work experience in any company my strength is adapt quickly to any environment
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Q3. My short term goals is to get placed in a reputed company like yours wich will allow me to enhance my skills and knowledge
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Q4. My long term goal would be to reach a higher position in our company
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Q1. Selenium,java ,api testing,maven,manual testing
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