Morningstar Project Automation Engineer Interview Questions and Answers

Simple coding questions for 1 hour duration

Q1. Coding question about graph data structure
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Q2. Implementation of hashmap using OOPS
Ans. 
Implementing hashmap using OOPS involves creating a class with key-value pairs and methods for adding, retrieving, and deleting entries.
• Create a class with private data members for storing key-value pairs

• Implement methods for adding a key-value pair, retrieving a value by key, and deleting a key-value pair

• Use hashing function to map keys to indices in an array for efficient retrieval

• Handle collisions by using technique
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It had 3 questions, the level was medium hardish

Q1. There were 3 rounds of interviews, 2 technical and 1 HR, ln First round I was asked about OOPs, 2 medium level DSA questions, asked to write code on paper and explain the approach. Questions: 1. Given an ...read more
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Write code to return the maximum profit by buying and selling stocks using available money

Q1. 1. Question on Projects, Job, Contribution.
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Q2. Javascript : closures, promise
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Q3. Guess Output based questions
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Q4. Coding : Given array and target, find the index pair of elements the sum becomes target
Ans. 
Given an array and target, find the index pair of elements the sum becomes target.
• Use a hash table to store the difference between target and current element

• Check if the difference exists in the hash table

• Return the indices of the current element and the difference
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90 minutes
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Q1. What is data structure ?
Ans. 
Data structure is a way of organizing and storing data in a computer so that it can be accessed and used efficiently.
• Data structures are used to manage large amounts of data efficiently.

• They provide a way to organize data in a way that makes it easy to access and manipulate.

• Examples of data structures include arrays, linked lists, stacks, queues, trees, and graphs.
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Q2. What is linked list?
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A linked list is a linear data structure where each element is a separate object with a pointer to the next element.
• Consists of nodes that contain data and a pointer to the next node

• Can be singly or doubly linked

• Used for dynamic memory allocation, implementing stacks and queues

• Example: Singly linked list - 1 -> 2 -> 3 -> null

• Example: Doubly linked list - null <- 1 <-> 2 <-> 3 -> null
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Q1. Tell me about yourself
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Q2. Tell me about your project
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Thirty minutes,basic aptitude concepts

One hour and basic programmming concepts

Q1. Tell me about yourself
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Q2. Whats are your strengths
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Q3. What are your weakness
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Q4. Your techniclal skills
Ans. 
Proficient in programming languages such as Java, Python, and C++, as well as experience with databases and web development.
• Strong knowledge of Java, Python, and C++ programming languages

• Experience with databases such as MySQL and MongoDB

• Familiarity with web development technologies like HTML, CSS, and JavaScript
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Q5. Tell me about your project
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Low-level design interview
I need to design a Music player app using oops concept

Q1. Sort the stack in O(1) time complexity
Ans. 
Use an additional stack to store sorted elements and maintain the minimum element at the top of the original stack.
• Create a new stack to store sorted elements.

• Pop elements from the original stack and compare with the top element of the new stack.

• If the popped element is smaller, push it to the new stack. If larger, keep popping from the new stack and push to the original stack until the correct position is found.

• Repeat...read more
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Q2. Difference between process and thread
Ans. 
A process is an instance of a program running on a computer, while a thread is a smaller unit of execution within a process.
• A process has its own memory space, while threads within the same process share memory.

• Processes are independent of each other, while threads within the same process can communicate with each other.

• Processes are heavyweight, requiring separate memory and resources, while threads are lightweight an...read more
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Q3. Difference between abstract class and interface
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Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructor, fields, and methods, while interface cannot have any of these.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract class is used to provide a common base for multiple derived classes, while interface is used to define a contract fo...read more
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Q4. What is race condition?
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A race condition is a situation in which the outcome of a program depends on the order of execution of its threads or processes.
• Occurs when multiple threads or processes access shared data or resources concurrently

• Can lead to unpredictable behavior or bugs in the program

• Prevented by using synchronization mechanisms like locks or semaphores

• Example: Two threads trying to increment a shared variable simultaneously
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Q5. What is normalization in dbms
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Normalization in DBMS is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a database into smaller, more manageable tables.

• It helps in reducing data redundancy by storing data in a structured way.

• There are different normal forms like 1NF, 2NF, 3NF, BCNF, etc.

• Example: In a database of students, instead of storing student details in multiple ...read more
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An aptitude has exam used to determine an individual skills a given activity

Q1. Tell me about yourself
Ans. I am Jagan, from poonamallee, I have completed my bachelor degree in computer science from Anna University
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Q2. What is your strength
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Q3. What is your weakness
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Q4. Why did you decide to apply to this role?
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Q5. Why should I hire you?
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