Comviva Technology Software Engineer Interview Questions and Answers

Q1. What are the differences between the PHP functions explode and implode?
Ans. 
explode splits a string into an array, while implode joins array elements into a string.
• explode(separator, string): Splits a string by a specified separator.

• Example: explode(',', 'apple,banana,cherry') returns ['apple', 'banana', 'cherry'].

• implode(separator, array): Joins array elements into a single string with a specified separator.

• Example: implode('-', ['2023', '10', '05']) returns '2023-10-05'.

• explode is used for p...read more
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Q2. What is your knowledge and experience with PHP frameworks?
Ans. 
I have extensive experience with PHP frameworks like Laravel and CodeIgniter, focusing on building scalable web applications.
• Proficient in Laravel for its elegant syntax and robust features like Eloquent ORM and Blade templating.

• Experience with CodeIgniter for lightweight applications, emphasizing speed and simplicity.

• Utilized Symfony components in various projects for reusable libraries and better structure.

• Implemente...read more
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Clocks and calendars
Puzzles
Coding and decoding
Blood relations
Seating arrangements
Cause and effect
Series completion
Binary logic

Q1. Past experience
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Q1. Basic hr question
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Simple 2 leetcode easy questions, along with MCQs

Q1. Asked about implementation of linked lists,and questions about project
Ans. Implement the linked list with java
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Q2. Swap 2 variables without using a third one
Ans. 
To swap 2 variables without using a third one, use arithmetic operations.
• Add the values of both variables and store the result in one of the variables.

• Subtract the value of the second variable from the sum and store the result in the second variable.

• Subtract the value of the first variable from the sum and store the result in the first variable.
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Q3. Use the XOR operator
Ans. 
XOR operator is a logical operator that returns true if and only if both operands are different.
• XOR is represented by the symbol ^

• It can be used to toggle a bit (e.g. x ^= 1)

• It can be used to check if two values are different (e.g. x ^ y)

• It can be used to encrypt and decrypt data

• It can be used to find the odd occurring element in an array
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