Mphasis Gcp Engineer Interview Questions and Answers

Q1. Java questions and basics of testing
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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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Merit and demerit of Machine learning ?

General Aptitude and reasoning

Q1. Oops concept, DBMS , Data Structure
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Q2. What is Normalisation?
Ans. 
Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.
• It involves dividing larger tables into smaller ones and defining relationships between them.

• Normalization helps to eliminate data inconsistencies and anomalies.

• There are different levels of normalization, such as first normal form (1NF), second normal form (2NF), and so on.

• Normalization can improve database pe...read more
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Q3. What is polimorphism?
Ans. 
Polymorphism is the ability of an object to take on many forms.
• It allows objects of different classes to be treated as if they were objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A shape class can have multiple subclasses like circle, square, etc. and all can be treated as shapes.

• Example: A method can take an object of a parent class as a parameter and it can accept a
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Q4. What is Stack and Pre and post Tree formation
Ans. 
Stack is a data structure that follows LIFO. Pre and post tree formation are methods of traversing a tree.
• Stack is used for backtracking, undoing, and recursion.

• Pre-order traversal visits the root node first, then left subtree, then right subtree.

• Post-order traversal visits the left subtree, then right subtree, then root node.
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Q1. Tell me about yourself
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Q2. Tell me About company ?
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Its was english grammer ,math & IT and genral knowledge based test paper

Q1. Java developer questions they ask
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Q2. Frontend development
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Q3. Backend development
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Q4. Information technology
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Q5. Core java development
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Q6. Html xtml java script
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Q1. Introduction questions
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Q2. Family background questions
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Q3. College related questions
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Q4. Salary negotiable
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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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