Applicate Interview Questions and Answers

Q1. What are Closures, Promises in JS?
Ans. 
Closures are functions that have access to variables from their outer scope. Promises are objects used for asynchronous programming in JavaScript.
• Closures are created when a function is defined inside another function and the inner function has access to the outer function's variables.

• Closures allow for data encapsulation and private variables in JavaScript.

• Promises are used to handle asynchronous operations and provid...read more
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Q2. State management in Functional Based Component in React JS
Ans. 
State management in functional components involves using hooks such as useState and useEffect.
• useState hook is used to manage state in functional components

• useEffect hook is used to handle side effects and update state

• React Context API can be used for global state management

• Redux can also be used for state management in functional components
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Q3. Nth Node from last in LinkedList.
Ans. 
Find the Nth node from the end of a linked list.
• Traverse the linked list and count the number of nodes.

• Calculate the position of the Nth node from the start.

• Traverse the linked list again and return the Nth node from the start.
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Q4. Given the reference of a node delete the node from the linkedlist
Ans. 
Delete a node from a linked list given its reference
• Set the previous node's next pointer to the current node's next pointer

• Free the memory allocated to the current node
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Q1. Which languages i am familar with?
Ans. 
I am familiar with Java, Python, and C++.
• Proficient in Java with experience in developing web applications using Spring framework

• Comfortable with Python for data analysis and scripting

• Familiar with C++ for competitive programming and algorithm development
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Q2. Normal Discussion about company
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Q1. My self,my hobbies.my education details
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Q2. My location.my nature
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Q3. My ambition, experience
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Q4. Expecte salary,which month joining
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Q5. My project work detais
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Easy aptitude and some javascript/Java based mcqs and 2 easy coding questions

1-2 basic DS Algo based questions in 4 hours

Q1. Preorder traversal of tree, quick sort, merge sort, difference between binary and binary search tree and some questions on Java/ javascript
Ans. 
Question on tree traversal, sorting algorithms, and Java/Javascript
• Preorder traversal visits root, left subtree, then right subtree

• Quick sort uses partitioning to sort elements in place

• Merge sort divides array into halves, sorts them, then merges them

• Binary trees have at most 2 children per node, while binary search trees have left child < parent < right child

• Java is a statically typed language, while Javascript is dyn...read more
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