Uplers PHP Developer Interview Questions and Answers

Q1. Difference between exe and dll
Ans. 
Exe is an executable file that can be run independently, while DLL is a dynamic link library that is loaded by programs when needed.
• Exe stands for executable file, while DLL stands for dynamic link library.

• Exe files can be run independently, while DLL files are loaded by programs when needed.

• Exe files have their own memory space, while DLL files share memory space with the calling process.

• Exe files are typically larger...read more
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Q2. What are http verbs
Ans. 
HTTP verbs are used to indicate the action to be performed on a resource in a RESTful API.
• GET - retrieve data from a server

• POST - send data to a server to create/update a resource

• PUT - update a resource on the server

• DELETE - remove a resource from the server

• PATCH - partially update a resource on the server
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Q3. What is method overloading and overriding Output based question
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Q4. Linq query to filter data and group by
Ans. 
Use Linq query to filter data and group by in C#
• Use 'Where' method to filter data based on a condition

• Use 'GroupBy' method to group the filtered data based on a key

• Example: var result = data.Where(x => x.Property == value).GroupBy(x => x.GroupKey)
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Q5. Attribute in mvc
Ans. 
An attribute in MVC is a piece of metadata that provides additional information about a model, view, or controller.
• Attributes are used to add behavior or data to a class or method in MVC

• They can be used for validation, authorization, caching, etc.

• Examples include [Required], [Authorize], [OutputCache]
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Graphs ,arrays , Hashmaps and Heaps

Q1. Graphs related dfs
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Q2. Changes on graph structure
Ans. 
Changes on graph structure involve adding, removing, or modifying nodes and edges.
• Adding a new node to the graph

• Removing an existing node from the graph

• Modifying the weight of an edge in the graph
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Q1. About JS in general
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Q2. Basic JS concepts
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Q1. Oops question asked
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Q2. Sql questions asked
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Asked basic mcq and leetcode level questions

Q1. It was resume based Interview. Asked about software development questions
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Q1. Salary based discussions and behavioural questions
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Round duration - 90 minutes
Round difficulty - Easy

The round was conducted on the HackerRank platform. It was conducted in the morning from 12:00 pm to 1:30 pm.
The only requirement was a stable internet connection.

Q1. 
Valid Parentheses Problem Statement
Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.
Input:
The first line contains an...read more
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Q2. 
Date Reformatting
You have a string 'S' representing a date in the "Day Month Year" format, where:
• Day is one of {"1st", "2nd", "3rd", ..., "29th", "30th", "31st"}.
• Month is one of {"Jan", "Feb", "M...read more
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Round duration - 60 Minutes
Round difficulty - Medium

It was conducted in the morning, at around 8 am, and was conducted on the Blue Jeans Platform. It was an online video interview, where the interviewer asked me 2 questions related to DSA.

Q1. 
Distinct Islands Problem Statement
Given a two-dimensional array/list consisting of integers 0s and 1s, where 1 represents land and 0 represents water, determine the number of distinct islands. A group of...read more
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Q2. 
Count and Say Sequence Problem
The 'Count and Say' sequence is a series of strings in which each consecutive term is generated by describing the previous term. The sequence begins with '1'.
Your task is ...read more
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Round duration - 30 minutes
Round difficulty - Medium

This round was conducted after the first round in the morning. It was conducted at 10:00 am.

Q1. 
Distribute Items Problem Statement
Calculate the number of ways to distribute a given number of items 'N' among three people such that each person gets at least one item, and only one person receives the ...read more
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Round duration - 45 minutes
Round difficulty - Medium

This was an HR round and was conducted on the same day at around 12:00 pm