HumaneBITS Interview Questions and Answers

Q1. Explain how login works in CodeIgniter/Laravel
Ans. 
Login in CodeIgniter/Laravel involves creating a form for users to input their credentials, validating the input, checking against database records, and setting a session for authenticated users.
• Create a login form with fields for username and password

• Validate user input to ensure it meets required criteria

• Check the entered credentials against records in the database

• Set a session for authenticated users to maintain the...read more
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Q2. Difference between session & cookie
Ans. 
Session stores data on server side while cookie stores data on client side.
• Session data is stored on the server, while cookie data is stored on the client's browser.

• Sessions are more secure as the data is not exposed to the client, while cookies can be easily manipulated by the client.

• Sessions are typically used for storing sensitive information like user credentials, while cookies are used for tracking user behavior o...read more
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Q3. Write PHP script to sort an array without PHP default functions
Ans. 
PHP script to sort an array without default functions
• Create a function to implement a sorting algorithm like bubble sort, selection sort, or insertion sort

• Loop through the array and compare each element with the next one to determine the order

• Swap elements if they are in the wrong order until the array is sorted
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Q4. Write PHP script to find occurrence of alphabets in a given string, string can contain special chars
Ans. 
This PHP script counts the occurrences of each alphabet in a given string, ignoring special characters and case sensitivity.
• Use preg_replace to remove special characters: $cleanString = preg_replace('/[^a-zA-Z]/', '', $inputString);

• Convert the string to lowercase to ensure case insensitivity: $cleanString = strtolower($cleanString);

• Use str_split to convert the string into an array of characters: $charArray = str_split(...read more
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Q5. How to set session for 5 mins
Ans. 
Use the session_set_cookie_params function to set session for 5 mins
• Use session_set_cookie_params function to set the session cookie lifetime to 5 minutes

• Example: session_set_cookie_params(300); // 300 seconds = 5 minutes
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Q6. Table A has columns A-name, A-desc, A-BID, Table B has B-ID, B-name, A-BID is FK from B table, which JOIN to apply if want to get records which are A and B too.
Ans. 
Use INNER JOIN to get records from both Table A and Table B based on the foreign key A-BID.
• Use INNER JOIN to combine records from Table A and Table B based on the common column A-BID.

• Specify the join condition using ON clause.

• Select the columns you want to retrieve from both tables.
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Q7. Explain PDO in PHP
Ans. 
PDO in PHP is a PHP Data Objects extension that provides a consistent interface for accessing databases.
• PDO stands for PHP Data Objects

• It is a database access layer providing a uniform method of access to multiple databases

• It is more secure than the traditional MySQL extension

• PDO supports prepared statements to prevent SQL injection attacks
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About role and responsibilities
Few use cases

Q1. Ceo and cto discussion
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Q2. Salary was non negotiable
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