Nielsen Senior Software Developer Interview Questions, Process, and Tips

Was asked data structure and program logic. scenario based questions were there.

Q1. Finding shortest path,
Ans. 
Shortest path can be found using algorithms like Dijkstra's, A* or BFS.
• Dijkstra's algorithm finds shortest path in weighted graphs

• A* algorithm is an extension of Dijkstra's algorithm and uses heuristics to guide search

• BFS can be used to find shortest path in unweighted graphs

• All three algorithms require a graph representation and a starting and ending node
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Q1. What is difference between function and stored procedure
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Functions return a single value, while stored procedures can perform multiple operations and return multiple values.
• Functions return a single value, while stored procedures can return multiple values.

• Functions are called in SQL statements, while stored procedures are called using EXECUTE statement.

• Functions cannot have output parameters, while stored procedures can have output parameters.

• Functions cannot modify server ...read more
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Q2. How to implement custom exception in MVC
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Custom exceptions can be implemented in MVC by creating a new class that inherits from Exception class.
• Create a new class that inherits from Exception class

• Override the constructor to pass a custom message to the base Exception class

• Throw the custom exception in the MVC controller or service layer
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Q1. Explain your current project. An then related to project
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Q2. How to get 3rd last node of a linked list
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To get the 3rd last node of a linked list, we can use two pointers approach.
• Start two pointers at the head of the linked list

• Move the first pointer to the 3rd node from the beginning

• Then move both pointers one node at a time until the first pointer reaches the end
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Q1. What fifo? diff btwn fifo and lifo
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FIFO stands for First In, First Out. LIFO stands for Last In, First Out.
• FIFO is a method for organizing and manipulating a data buffer, where the first element added is the first to be removed.

• LIFO is a method where the last element added is the first to be removed.

• FIFO is like a queue, while LIFO is like a stack.

• Example: In a FIFO queue, if elements A, B, and C are added in that order, they will be removed in the same...read more
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Q1. Uikit explaination
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Q2. Model classes with uikit
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Model classes in UIKit are used to represent data in an application's user interface.
• Model classes in UIKit typically subclass NSObject and are used to store and manage data for views.

• They can include properties to represent different data fields, methods to manipulate the data, and sometimes protocols for delegation.

• For example, a model class for a user profile in a social media app might have properties like username...read more
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Project related questions

Q1. Basics of sql and some coding questions
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Q2. Data structures
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Q1. Putin arrays strings
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Q1. Explain how you read messages from google cloud pusub
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Reading messages from Google Cloud Pub/Sub involves creating a subscription and pulling messages from the subscription.
• Create a subscription to a Google Cloud Pub/Sub topic

• Use the subscription to pull messages from the topic

• Process the messages received from the subscription
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