Cornerstone OnDemand Junior Software Developer Interview Questions and Answers

Q1. DSA Array, String and Hashmap questions
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Q2. Functional programming java questions
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Q1. Spring and spring boot related
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Q2. HLD scenario level questions
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Q3. SQL queries nested and joins
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Q4. DB related questions and experience level questions and previous project situations related questions
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Q5. Security level questions like XSS vulnerability and SQL injection
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First Round was Coding Test On Codility Platform . 3 Questions were Asked On Medium to Hard Level Arrays and Strings Topics.

Q1. Questions on the Approach of Solving the 1st Round Coding Problems.
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Q2. Questions on String Methods , Questions on String Palindrome and Substrings Palindrome.
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Q3. Sorting Techniques on Arrays , Questions on Two-Dimensional Arrays.
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Q4. Questions on Writing Base and Different Test Cases as per the Mentioned Problem Statement Given.
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Q1. Pillars of Object Oriented Programming. Real Life Example of Pillars of OOPS.
Ans. 
Pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism. Real life example: Vehicles.
• Inheritance: Car and Bike classes inheriting from Vehicle class.

• Encapsulation: Data hiding in a class to protect it from outside interference.

• Abstraction: Using a remote control to operate a TV without knowing its internal workings.

• Polymorphism: Overloading a method with different parameters in a class.
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Q2. Is Function Overloading the Only Example of Compile Time Polymorphism ?
Ans. 
No, Function Overloading is not the only example of Compile Time Polymorphism.
• Function Templates are another example of Compile Time Polymorphism where a single function can operate on different data types.

• Operator Overloading is also an example of Compile Time Polymorphism where operators can be overloaded to work with different data types.

• Static Polymorphism achieved through method overloading is another example of C
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Q3. Difference Between Arrays and LinkedLists. Cons and Pros of Using Them. Which Out of Both Would be Preferable in Different Situations ?
Ans. 
Arrays store elements in contiguous memory locations, while LinkedLists store elements in nodes with pointers to the next element.
• Arrays have constant time access to elements using index, while LinkedLists have O(n) access time as they need to traverse from the beginning.

• Arrays have fixed size, while LinkedLists can dynamically grow and shrink in size.

• Arrays are better for random access and search operations, while Lin...read more
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Q4. Creating LinkedList Class , Insertion and Deletion in a LinkedList , Reversing and Sorting a LinkedList , Questions on Circular Linked List.
Ans. 
Answering questions related to LinkedList operations and Circular LinkedList.
• LinkedList Class: Implement a class with nodes containing data and a reference to the next node.

• Insertion: Add a new node at the beginning, end, or at a specific position in the LinkedList.

• Deletion: Remove a node by updating references to skip over it.

• Reversing: Traverse the LinkedList and reverse the links between nodes.

• Sorting: Implement a s...read more
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Q5. Questions Based on Binary Trees , Binary Search Trees and Recursion.
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Q6. Reverse a String without Using Any Loop or Using Any Other Data Structure.
Ans. 
Use recursion to reverse the string without using loops or other data structures.
• Create a recursive function that takes the string as input.

• In the function, check if the string is empty or has only one character, return the string in that case.

• Otherwise, call the function recursively with the substring excluding the first character and concatenate the first character at the end.
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Q7. Program to Find the Maximum Occurring Number in an Array. Which Data Structure can be Used for Making the Code More Efficient ?
Ans. 
Use a hashmap to store frequency of each number in the array for efficient retrieval of maximum occurring number.
• Use a hashmap to store the frequency of each number in the array.

• Iterate through the array and update the frequency count in the hashmap.

• Find the number with the highest frequency in the hashmap to get the maximum occurring number.
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Q8. What is Multi-Threading in Java ? What are Generics ?
Ans. 
Multi-Threading in Java allows multiple threads to execute concurrently. Generics in Java enable type-safe collections and classes.
• Multi-Threading in Java allows for concurrent execution of multiple threads.

• Generics in Java enable type-safe collections and classes by allowing the use of parameterized types.

• Example of Multi-Threading: creating a new thread using the Thread class and implementing the run() method.

• Example...read more
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Q1. Questions Based on Resume , Skills and Projects.
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Q2. Why Bentley Systems ?
Ans. 
Bentley Systems is a global leader in infrastructure engineering software, providing innovative solutions for sustainable development.
• Bentley Systems offers cutting-edge technology and tools for infrastructure engineering projects.

• The company has a strong reputation for innovation and sustainability in the industry.

• Bentley Systems has a global presence, providing opportunities to work on diverse projects around the wor...read more
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Q3. Questions Based on Previous Employment and Internships.
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Q4. How Soon You Can Join Us ?
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Q1. Explain the technology stack you have been working on.
Ans. 
I have been working on a technology stack that includes Java, Spring Boot, Angular, and MySQL.
• Java programming language for backend development

• Spring Boot framework for building and deploying Java applications

• Angular framework for frontend development

• MySQL database for data storage and retrieval
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Q2. Deep dive into the .Net framework and its use in developing microservices using Web APIs
Ans. 
The .Net framework is a powerful tool for developing microservices using Web APIs.
• The .Net framework provides a set of libraries and tools for building scalable and reliable microservices.

• Web APIs in .Net allow for easy communication between different services and clients.

• Features like dependency injection and middleware in .Net make it easier to develop and maintain microservices.

• Examples of popular frameworks for bui...read more
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Q1. Explain how you would troubleshoot a network bottleneck in your web API application hosted in a public cloud like Azure or AWS.
Ans. 
To troubleshoot a network bottleneck in a web API application hosted in a public cloud like Azure or AWS, one can analyze network traffic, monitor server performance, and optimize resource allocation.
• Use network monitoring tools to analyze traffic patterns and identify potential bottlenecks.

• Monitor server performance metrics such as CPU usage, memory usage, and disk I/O to pinpoint any resource constraints.

• Optimize res...read more
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Q2. Explain the usage of Azure service fabric clusters
Ans. 
Azure Service Fabric clusters are used to deploy and manage microservices-based applications on Microsoft Azure.
• Azure Service Fabric clusters provide a platform for deploying and managing scalable and reliable microservices.

• They offer automatic scaling, rolling upgrades, and health monitoring for microservices.

• Service Fabric clusters can be used to deploy stateless or stateful microservices.

• They support multiple progra...read more
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Q1. Java,oop, microservice, JPA
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Q2. Spring boot , MySQL
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Q1. Java, spring boot
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Q2. Microservice, rest api
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It included question from aptitude, reasoning, English, CSE fundamentals like oops and sql

Q1. It included everything which was mentioned in your resume
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Q1. Same as round 2, it has few managerial questions as well
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Q1. Tell me about your self
Ans. 
I am a passionate software developer with 5 years of experience in building web applications using various technologies.
• 5 years of experience in software development

• Proficient in building web applications

• Skilled in using various technologies
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Q2. Resume discussion
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It was a 90minutes coding test where there was 2 coding question and 10 mcq each coding question carried 33% marks and even the 10mcq was 33% marks

Q1. Like it was full based on resume like on my resume i had put two web projects so most of the question was from web development and the aws cloud it took a lot of time and at last they asked the coding ques...read more
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Q1. Hr was easy just asked to introduce about myself and tell any one preffered project
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Q1. Threading: Write and use a mutex?
Ans. 
A mutex is a synchronization primitive that ensures only one thread can access a resource at a time.
• Create a mutex object using the appropriate library or language-specific function.

• Lock the mutex before accessing the shared resource to prevent other threads from accessing it.

• Unlock the mutex after finishing the operation on the shared resource to allow other threads to access it.

• Example: pthread_mutex_t mutex; pthread...read more
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Q2. Find the memory leak in a given set of code.
Ans. 
Identify memory leak in code
• Check for any dynamically allocated memory that is not being freed

• Look for any infinite loops or recursive functions that consume memory

• Use memory profiling tools like Valgrind to detect leaks

• Check for any global variables that are not properly managed
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