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JustDial Software Engineer Interview Questions and Answers
7 Interview questions
A MySQL stored procedure example
Use CREATE PROCEDURE statement to define a new stored procedure
Use BEGIN and END to enclose the procedure's code
Use parameters to pass values into the procedure
Use SELECT, INSERT, UPDATE, DELETE statements within the procedure
This code identifies unique strings in an array and counts their occurrences.
Use a dictionary to store string counts. Example: {'apple': 2, 'banana': 1}
Iterate through the array and update counts. Example: for 'apple', increment count.
Return the dictionary for unique strings and their counts.
Indexing in MySQL improves query performance by creating efficient data structures.
Indexes are created on columns in a table to speed up SELECT queries.
Primary key columns are automatically indexed in MySQL.
Indexes can be created using CREATE INDEX statement or by adding INDEX keyword in CREATE TABLE statement.
Indexes can be unique or non-unique.
Examples: CREATE INDEX idx_name ON table_name(column_name);
Examples: ...
Redis is an open-source, in-memory data structure store used as a database, cache, and message broker.
Redis is often used for caching data to improve performance in web applications.
It can also be used as a database to store key-value pairs for fast retrieval.
Redis can be used as a message broker for real-time applications by implementing pub/sub messaging.
Examples: Storing session data, caching frequently accesse...
AI recommendation systems use algorithms to analyze user data and provide personalized suggestions.
AI recommendation systems collect and analyze user data such as browsing history, preferences, and interactions.
They use machine learning algorithms to identify patterns and similarities between users and items.
Based on this analysis, the system generates personalized recommendations for users, such as movies, produc...
Cookies and cache in a PHP application can be handled by setting and retrieving cookies, using caching mechanisms like memcached or Redis, and implementing cache control headers.
Set cookies using setcookie() function in PHP
Retrieve cookies using $_COOKIE superglobal
Use caching mechanisms like memcached or Redis to store frequently accessed data
Implement cache control headers to control caching behavior in the appl...
Channels in golang are used for communication between goroutines
Channels are typed conduits through which you can send and receive values with the channel operator <-
Channels are used to synchronize and communicate between goroutines
Channels can be created using the make() function with a specified type
JustDial Software Engineer Interview Experiences
9 interviews found
Anonymous
(2 Questions)
- Q1. React hooks implemetation
- Q2. Node event loop
Interview Preparation Tips
Anuj mishra
(1 Question)
- Q1. Last company exprience
- Ans.
Worked as a Software Engineer at XYZ Company for 3 years.
Developed web applications using Java, Spring, and AngularJS.
Collaborated with cross-functional teams to deliver projects on time.
Participated in code reviews and provided feedback for improvements.
I applied via LinkedIn and was interviewed before Sep 2023. There was 1 interview round.
(2 Questions)
- Q1. Templates in golang?
- Ans.
Templates in golang are used for generating text-based output such as HTML or other markup languages.
Templates in golang are created using the text/template package or html/template package.
They allow for the separation of code and presentation, making it easier to maintain and update the output format.
Templates can include variables, control structures, and functions to generate dynamic content.
Example: {{.Name}} will...
- Q2. Channel in golang
- Ans.
Channels in golang are used for communication between goroutines
Channels are typed conduits through which you can send and receive values with the channel operator <-
Channels are used to synchronize and communicate between goroutines
Channels can be created using the make() function with a specified type
prakash Jaiswal
(2 Questions)
- Q1. On call interview
- Q2. Basic javascript questions and all depends on the team lead for which you are being hired
Selected
I applied via Approached by Company and was interviewed in Jul 2022. There were 4 interview rounds.
(1 Question)
- Q1. Tell me about yourself?
- Ans. Sure! My name ----- and i am software engineer with experience of x years.I have a strong background in web technologies.Throughout my career, I have worked on various projects, Including Ecommerce .I am passionate about problem solving and finding efficient solutions through coding. I enjoy working in collaborative environment where i can learn from my team members and contribute my skill i have learnt so far to crea...
(3 Questions)
- Q1. How would you handle cookies and cache in a PHP application?
- Ans.
Cookies and cache in a PHP application can be handled by setting and retrieving cookies, using caching mechanisms like memcached or Redis, and implementing cache control headers.
Set cookies using setcookie() function in PHP
Retrieve cookies using $_COOKIE superglobal
Use caching mechanisms like memcached or Redis to store frequently accessed data
Implement cache control headers to control caching behavior in the applicati...
- Q2. Can you explain what redis is and how it can be used in a web application?
- Ans.
Redis is an open-source, in-memory data structure store used as a database, cache, and message broker.
Redis is often used for caching data to improve performance in web applications.
It can also be used as a database to store key-value pairs for fast retrieval.
Redis can be used as a message broker for real-time applications by implementing pub/sub messaging.
Examples: Storing session data, caching frequently accessed dat...
- Q3. Can you explain how an AI recommendation system works?
- Ans.
AI recommendation systems use algorithms to analyze user data and provide personalized suggestions.
AI recommendation systems collect and analyze user data such as browsing history, preferences, and interactions.
They use machine learning algorithms to identify patterns and similarities between users and items.
Based on this analysis, the system generates personalized recommendations for users, such as movies, products, o...
(2 Questions)
- Q1. How do you approach working in a collaboration team environment , and can you provide an example of a sucessful team collaboration?
- Ans. I believe in fostering a positve and inclusive team environment.Through constant collabroration , regular feedback ansd a shared sense of ownership , we can sucessfuly deliver the feature within the given timeline.We practiced agile methodologies ,such as daily standups , sprint planning and retrospectives.This allow us to maintain a clear understanding of individual tasks and adapt our approaches as needed.
- Q2. Formal Introduction and company related information?
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via Naukri.com and was interviewed before Apr 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Write a MySQL stored procedure
- Q2. How can indexing in MySQL
- Ans.
Indexing in MySQL improves query performance by creating efficient data structures.
Indexes are created on columns in a table to speed up SELECT queries.
Primary key columns are automatically indexed in MySQL.
Indexes can be created using CREATE INDEX statement or by adding INDEX keyword in CREATE TABLE statement.
Indexes can be unique or non-unique.
Examples: CREATE INDEX idx_name ON table_name(column_name);
Examples: CREAT...
(1 Question)
- Q1. Write a code to to find out data and duplicate count from a array
Interview Preparation Tips
- Coding
- Database
Skills evaluated in this interview
ROHIT PATIL
Selected
I applied via Company Website and was interviewed before Apr 2022. There were 3 interview rounds.
(2 Questions)
- Q1. Find the index of greatest number from the array?
- Q2. Sql question find the top 3 employess who have max salary ?
(2 Questions)
- Q1. Tell me something about yorself?
- Q2. Why you want to join justdial?
Skills evaluated in this interview
Selected
I applied via Hirist and was interviewed before Feb 2023. There were 2 interview rounds.
Simple question from array ad object
(1 Question)
- Q1. Basic question on java script and node js
I applied via Naukri.com and was interviewed in Jan 2022. There were 2 interview rounds.
(1 Question)
- Q1. Questions on JavaScript, Mysql
(1 Question)
- Q1. Questions on MySQL database
Interview Preparation Tips
Top trending discussions
Interview questions from similar companies
I applied via Campus Placement and was interviewed in Dec 2016. There were 4 interview rounds.
Interview Questionnaire
4 Questions
- Q1. Given a 2d matrix with some D doors and W walls, we need fill distance matrix with minimum distance to the nearest door
- Ans.
Given a 2D matrix with doors and walls, fill distance matrix with minimum distance to the nearest door.
Iterate through the matrix and find the doors
Use Breadth-First Search (BFS) to calculate the minimum distance from each cell to the nearest door
Update the distance matrix with the minimum distances
- Q2. Given a read-only array we want to find kth smallest element in unordered array with O(1) space
- Ans.
Find kth smallest element in unordered array with O(1) space
Use the QuickSelect algorithm to partition the array and find the kth smallest element
Choose a pivot element and partition the array into two subarrays
Recursively partition the subarray that contains the kth smallest element
Repeat until the pivot element is the kth smallest element
Time complexity: O(n) average case, O(n^2) worst case
- Q3. Design question
- Q4. Find friends of friend who already are not friends with you
- Ans.
To find friends of friends who are not already friends with you, we can first find your friends and then their friends excluding yourself and your friends.
Get your list of friends
For each friend, get their list of friends
Exclude yourself and your friends from the final list of friends of friends
Interview Preparation Tips
Experience: It started with an informal talk after he gave his introduction. We talked about the cyclone that was going to be there and what I did in my internship and my previous projects. Then we moved to questions. After solving both questions he asked if I had questions.
Tips: Just walk the interviewer through the solution you're proposing.
Round: Other Interview
Experience: He started with a design question with how to stream an image such that all clients see the same image at the same time. You need to take care of delays, network problems. He kept on adding new elements like compression, streaming, utc time related issues, client rendering delays and so on.
Round: Other Interview
Experience: This was bar-raiser round.
Skills: Design, Algorithms And Data Structures, Graph Theory
College Name: IIT Madras
Skills evaluated in this interview
JustDial Interview FAQs
The duration of JustDial Software Engineer interview process can vary, but typically it takes about less than 2 weeks to complete.
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