ValueLeaf Services Executive Interview Questions and Answers

Easy leetcode data structure question

Q1. Write working code for calling a rest API, design rate limiter
Ans. 
Code for calling a REST API and designing a rate limiter
• Use a library like requests or axios to make the API call

• Implement a token bucket algorithm for rate limiting

• Set a maximum number of requests per second and queue excess requests

• Consider using a distributed rate limiter for scalability
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Q1. Design Database schema for instagram
Ans. 
Design a database schema for Instagram.
• Create tables for users, posts, comments, likes, and follows.

• Use primary and foreign keys to establish relationships between tables.

• Store user data such as username, email, and password securely.

• Include fields for post content, location, and timestamp.

• Track likes and comments on posts.

• Implement a notification system for follows and likes.

• Consider scalability and performance in the...read more
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Q1. Laravel framework question.
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Q1. Laravel framework question
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Q1. Reasons for the drop in CPM
Ans. 
Possible reasons for drop in CPM include seasonality, changes in ad inventory, shifts in audience demographics, and increased competition.
• Seasonal fluctuations in advertising demand

• Changes in available ad inventory

• Shifts in audience demographics affecting targeting effectiveness

• Increased competition leading to lower bids
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Q2. Types of floor in GAM
Ans. 
Types of floors in GAM include carpet, hardwood, tile, and laminate.
• Carpet

• Hardwood

• Tile

• Laminate
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Q1. Basic SQL related- had to write 2 queries with basic joins.
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Q2. Questions related to past experience
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Q3. Drill down of 2 projects.
Ans. 
Managed project to implement new inventory system and led team in redesigning customer service process.
• Implemented new inventory system to streamline operations

• Led team in redesigning customer service process to improve efficiency

• Successfully managed project timelines and budgets

• Collaborated with cross-functional teams to ensure project success
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HackerRank Test, basic questions related to the profile.

Q1. Coding Interview with the team manager
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Q1. What are synthetic Events?
Ans. 
Synthetic Events are events that are created by the browser to mimic real user events.
• Synthetic Events are used in React to handle events in a consistent manner across different browsers.

• They are created by React to wrap native browser events and provide additional functionality.

• Examples include onClick, onChange, and onSubmit events in React.
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Q2. What is event bubbling?
Ans. 
Event bubbling is the process where an event triggered on a child element is propagated up through its parent elements.
• Event bubbling allows a single event handler to be attached to a parent element, which will be triggered for all its children.

• When an event occurs on a child element, it first runs the event handlers on the child, then on its parent, and so on up the DOM tree.

• Event bubbling can be stopped using event.s
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