Green Rider Technology Interview Questions and Answers

Basic python programming and some question related to prompt

Q1. What is constructors
Ans. 
Constructors are special methods in a class that are used to initialize objects.
• Constructors have the same name as the class they belong to.

• They are called automatically when an object is created.

• Constructors can have parameters to initialize object properties.

• Example: public class Car { public Car(String color) { this.color = color; } }
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Q2. What is typecating
Ans. 
Typecasting is the process of converting a variable from one data type to another.
• Typecasting can be done implicitly or explicitly in programming languages.

• For example, converting an integer to a float or a string to an integer.

• Typecasting can help in avoiding errors and ensuring proper data manipulation.
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Q3. What is cloud computing?
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Cloud computing is the delivery of computing services over the internet, including storage, servers, databases, networking, software, and more.
• Cloud computing allows users to access and use resources on-demand without the need for physical infrastructure.

• Examples of cloud computing services include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform.

• Cloud computing offers scalability, flexibility, cos...read more
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Q4. What is recursion?
Ans. 
Recursion is a programming technique where a function calls itself in order to solve a problem.
• Recursion involves breaking down a problem into smaller subproblems and solving them recursively.

• Each recursive call works on a smaller input until a base case is reached.

• Examples include factorial calculation, Fibonacci sequence generation, and tree traversal.
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Q5. What is call by reference and call by value
Ans. 
Call by reference passes the address of the variable, allowing the function to modify the original value. Call by value passes a copy of the variable's value.
• Call by reference allows a function to modify the original value of a variable passed to it.

• Call by value passes a copy of the variable's value to the function, so any changes made inside the function do not affect the original value.

• Example of call by reference: ...read more
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Q1. Tell me about yourself
Ans. 
I am a passionate AI enthusiast with a background in computer science and a strong interest in machine learning and natural language processing.
• Completed coursework in machine learning and deep learning

• Developed a chatbot using natural language processing techniques

• Participated in Kaggle competitions to apply AI algorithms

• Interned at a tech company working on AI-driven projects
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Q2. Tell me about your best childhood memories.
Ans. 
Playing in the backyard with my siblings and building forts out of blankets and pillows.
• Spending hours playing outside with my siblings

• Building forts out of blankets and pillows

• Imagining adventures and creating stories together
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Q1. Given an array of k linked lists, each of which is sorted in ascending order, how can you merge all the linked lists into a single sorted linked list and return the result?
Ans. 
Merge k sorted linked lists into one sorted linked list efficiently.
• Use a min-heap (priority queue) to keep track of the smallest elements from each list.

• Initialize the heap with the head nodes of all k linked lists.

• Extract the smallest node from the heap, add it to the result list, and push the next node from the same list into the heap.

• Repeat until all nodes are processed.

• Time complexity is O(N log k), where N is the...read more
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Q2. You are given a list of unique integers that are sorted but rotated at a certain pivot. Additionally, you are given a target value, and your task is to find its index in the list. If the target value is no...read more
Ans. 
Find the index of a target value in a rotated sorted array of unique integers.
• Use binary search for efficient O(log n) time complexity.

• Identify the pivot point where the array is rotated.

• Check if the target is in the left or right sorted half.

• Example: For array [4,5,6,7,0,1,2] and target 0, return index 4.

• Example: For array [1,3], target 3 returns index 1.
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