Ojas Innovative Technologies PHP Developer Interview Questions and Answers

Easy to medium leetcode questions

Q1. Sql is the most important , Focus on Joins ,Sub query and Sql basics
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Q2. Joining tables with different joins
Ans. 
Joining tables with different joins in SQL
• Use INNER JOIN to return rows when there is at least one match in both tables

• Use LEFT JOIN to return all rows from the left table and the matched rows from the right table

• Use RIGHT JOIN to return all rows from the right table and the matched rows from the left table

• Use FULL JOIN to return rows when there is a match in one of the tables
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Q1. Previous year experience
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Q1. Type of value added to the company
Ans. 
I add value to the company by leveraging my skills and experience to drive growth, improve efficiency, and enhance overall performance.
• Implementing cost-saving initiatives

• Developing innovative solutions to challenges

• Improving processes and workflows

• Increasing revenue through strategic partnerships

• Enhancing customer satisfaction and retention
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Q1. Tell about my self and experience
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Q1. Telling about myself and my experience with my manager
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2 questions of DSA medium to hard

Q1. Question related to oops
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Q2. Question related to coding
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Q3. I was rejected after 2nd round
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Q1. Question related to advanced topic in oops
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Q2. Question related to coding
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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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60mintues DSA level coding exam