Morningstar Interview Questions, Process, and Tips

Q1. Ask to write code for equal and hashcode in notepad
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Q2. Type of Collections and its internal working
Ans. 
Java collections are data structures that store and manipulate groups of objects.
• Types of collections include List, Set, Map, Queue, etc.

• Internal workings involve data structures like arrays, linked lists, hash tables, etc.

• Collections framework provides interfaces and classes for working with collections.
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Q3. Count number of occurrence of string from Array
Ans. 
Count occurrences of a specific string in an array of strings.
• Iterate through the array and use a HashMap to store the count of each string.

• Use the string as key and increment the count each time it is encountered.

• Return the count of the specific string at the end.
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Q4. Write a code using stream
Ans. 
Using stream to filter a list of strings
• Use the filter method to apply a predicate to each element in the stream

• Convert the stream back to a list using the collect method
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Accounting concepts,private equity,Corporate action ,normalized income,noncash activity,income statement,balance sheet,cash flow,Diluted eps,Employe stock oprion,Debt capital structure.

Q1. Questions related to Java, AWS, Microservices
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Q2. Program to find 2 biggest number in array
Ans. 
Program to find 2 biggest numbers in array of strings
• Iterate through the array and convert each element to integer

• Keep track of the two biggest numbers found so far

• Return the two biggest numbers at the end
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Q1. Java related questions
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Q2. Design patterns
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Q1. Ask to write code for equal and hashcode in notepad
Add your answer
Q2. Type of Collections and its internal working
Ans. 
Java collections are data structures that store and manipulate groups of objects.
• Types of collections include List, Set, Map, Queue, etc.

• Internal workings involve data structures like arrays, linked lists, hash tables, etc.

• Collections framework provides interfaces and classes for working with collections.

• Example: ArrayList internally uses an array to store elements.
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Q3. Count number of occurrence of string from Array
Ans. 
Count occurrences of a specific string in an array of strings.
• Iterate through the array and compare each element with the target string.

• Increment a counter each time the target string is found.

• Return the final count of occurrences.
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Normal ...basic English ,logical questions & finance based questions.

Q1. How will you deal with your manager if you had fights ( all behavioural questions as per office to test your confidence for the role)
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Q2. Be confident mostly behavioural & situation based questions asked for this role.
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Hakerrank problem statement to solve

Q1. Core Java, Spring Boot, AWS
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Q2. What is DI and IoC, RestTemplate, Design patterns
Ans. 
DI and IoC are design principles in software development. RestTemplate is a class for making HTTP requests. Design patterns are reusable solutions to common problems.
• DI (Dependency Injection) is a design pattern where objects are passed their dependencies rather than creating them internally.

• IoC (Inversion of Control) is a design principle where the control of object creation and lifecycle is inverted to a container or...read more
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Q3. SQL vs NoSQL, Working of Keys in DynamoDB
Ans. 
SQL is relational database, NoSQL is non-relational. DynamoDB uses primary keys for data retrieval.
• SQL is a relational database management system, while NoSQL is a non-relational database management system.

• SQL databases use structured query language for defining and manipulating data, while NoSQL databases use various data models like document, key-value, graph, etc.

• In DynamoDB, keys are used for data retrieval. Primar...read more
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Q4. How hashmap works
Ans. 
HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• HashMap uses a hash function to map keys to indices in an array.

• Collisions can occur when multiple keys hash to the same index, which is resolved using techniques like chaining or open addressing.

• HashMap in Java is a popular implementation that provides constant-time complexity for basic operations like get and
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Q5. Circuit Breaker design pattern
Ans. 
Circuit Breaker design pattern is used to prevent a system from repeatedly trying to execute an operation that is likely to fail.
• Circuit Breaker pattern is used to handle faults in distributed systems by providing a way to fail fast and prevent cascading failures.

• It monitors the number of failures and once a threshold is reached, it opens the circuit and stops executing the operation.

• After a certain period of time, the...read more
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