Walking Tree Assistant Manager Interview Questions and Answers

Q1. What is Optional chaining ?
Ans. 
Optional chaining allows safe access to deeply nested object properties without causing runtime errors if a property is undefined or null.
• Prevents runtime errors when accessing properties of an object that may not exist.

• Syntax: Use the '?' operator before accessing a property, e.g., obj?.property.

• Example: const name = user?.profile?.name; // returns undefined if user or profile is null.

• Can be used with function calls: ...read more
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Q2. What is Debouncing?
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Coding questions about array and string.

Cosing questions about sql and ds.

Q1. Personal and behavioral questions.
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Easy to medium leetcode questions

Q1. Tell me about your self
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Q2. Write a for palindrome
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Q3. SQL inner Joins
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Q4. Object orientend programming
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Q1. How make a queue using a stack
Ans. 
To implement a queue using a stack, use two stacks and simulate the queue operations.
• Use two stacks, one for enqueue operation and one for dequeue operation.

• For enqueue operation, simply push elements onto the stack used for enqueueing.

• For dequeue operation, if the dequeue stack is empty, pop all elements from enqueue stack and push onto dequeue stack.

• Then pop from the dequeue stack to simulate dequeue operation.
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Q2. Create a linked list
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A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.
• Create a Node class with data and next pointer

• Initialize a head pointer to null

• Add nodes by updating next pointers

• Traverse the list by following next pointers
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