TechGig Senior PHP Developer Interview Questions and Answers

Hackathon on chatbot development website

Q1. OOPS basics like shallow copy deep copy
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Q2. Sorting techniques and psuedo code
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Q1. Questions on projects
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Q2. Introduction and insights of comapny
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Q1. What is JWT Authentication
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Q2. Design Patterns
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Q3. Different Types of Routing in MVC
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Technology advantage or not

All aptitude topics,logical reasoning

Q1. Oops,2 coding questions
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Q2. Palindrome,even number
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Q1. What do you know
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Q2. Do you have any questions
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There were 3 coding questions of moderate difficulty.

Q1. Code transpose of matrix
Ans. 
Transpose a matrix by swapping rows with columns
• Iterate through each row and column and swap the elements

• Create a new matrix with swapped rows and columns

• Ensure the new matrix has the correct dimensions
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Q2. Implement swap method.
Ans. 
Implement a swap method for two variables.
• Create a temporary variable to store the value of one variable.

• Assign the value of the second variable to the first variable.

• Assign the value of the temporary variable to the second variable.
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Q1. Depth of a binary tree
Ans. 
The depth of a binary tree is the number of edges on the longest path from the root node to a leaf node.
• Depth of a binary tree can be calculated recursively by finding the maximum depth of the left and right subtrees and adding 1.

• The depth of a binary tree with only one node (the root) is 0.

• Example: For a binary tree with root node A, left child B, and right child C, the depth would be 1.
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Q2. Middle of linked list.
Ans. 
To find the middle element of a linked list, use two pointers - one moving at double the speed of the other.
• Use two pointers - slow and fast, with fast moving at double the speed of slow.

• When fast reaches the end of the list, slow will be at the middle element.
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Q3. Design book my show
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Q1. Why do you want to join hashedin.
Ans. 
I want to join Hashedin because of its reputation for innovative projects and collaborative work environment.
• Reputation for innovative projects

• Collaborative work environment

• Opportunities for growth and learning
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Q2. Challenges faced in my previous internship.
Ans. 
Managing tight deadlines and learning new technologies were the main challenges faced in my previous internship.
• Meeting tight project deadlines

• Adapting to new technologies quickly

• Working in a fast-paced environment

• Collaborating with team members effectively
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Q1. Explain exceptional handling
Ans. 
Exception handling is a mechanism to handle runtime errors in a program.
• Exception handling helps in gracefully handling unexpected errors in a program.

• It prevents the program from crashing and allows for proper error logging and recovery.

• Commonly used keywords in exception handling are try, catch, finally, and throw.

• Example: try { // code that may throw an exception } catch(Exception ex) { // handle the exception }
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Q2. Explain difference between abstract and interfaces
Ans. 
Abstract classes can have implementation details while interfaces cannot.
• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• A class can only inherit from one abstract class, but can implement multiple interfaces.

• Abstract classes can have constructors, fields, and properties, while interfaces cannot.

• Abstract classes are used when some common functionality ne...read more
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Q3. One coding question on arrays
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Q1. What are the BluePrism best practices
Ans. 
BluePrism best practices include following naming conventions, modular design, exception handling, and version control.
• Follow consistent naming conventions for objects and processes

• Design processes in a modular way for reusability and maintainability

• Implement robust exception handling to manage errors effectively

• Use version control to track changes and collaborate with team members
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Q2. How to spy the elements in Surface Automation
Ans. 
To spy elements in Surface Automation, use the UI Explorer tool to identify and select the elements on the screen.
• Use UI Explorer tool to spy elements

• Identify and select elements on the screen

• Verify properties and attributes of elements
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Q1. Opps concept in php
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Q2. Orm in laravel and explain
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Q3. Write SQL query for thirst highest salary from employees table
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Q1. Past project related questions
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Q2. Python and sql queries
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Waiting for l2 round