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Uplers Javascript Developer Interview Questions and Answers
Uplers Javascript Developer Interview Experiences
1 interview found
Anonymous
I applied via Referral and was interviewed in Nov 2021. There was 1 interview round.
(3 Questions)
- Q1. Map reduce and filter in JavaScript
- Ans.
Map, reduce and filter are array methods in JavaScript used for manipulating and transforming data.
Map creates a new array by applying a function to each element of the original array.
Reduce reduces an array to a single value by applying a function to each element.
Filter creates a new array with all elements that pass the test implemented by the provided function.
- Q2. What is event delegation
- Ans.
Event delegation is a technique where a single event listener is added to a parent element to handle events on its child elements.
Improves performance by reducing the number of event listeners
Useful for dynamically added elements
Event bubbling is utilized
Example: Click event on a list of items
- Q3. What is event bubbling
- Ans.
Event bubbling is the propagation of an event from the innermost element to the outermost element in the DOM tree.
When an event occurs on an element, it first runs the handlers on that element, then on its parent, and so on up to the document object.
It allows for event delegation, where a single event handler can be attached to a parent element to handle events for all its children.
Event.stopPropagation() can be used t...
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I applied via Walk-in and was interviewed in Sep 2020. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. Aptitude question
- Q2. Interview panalam questions
Interview Preparation Tips
I appeared for an interview before Nov 2019.
Interview Questionnaire
4 Questions
- Q1. How do you know about this company?
- Q2. I have research about this company from various ways and collect a good bunch of information and decided to hire job from this company.
- Q3. In which skill you are fit to perfect?
- Q4. Well, iam a quick learner i grab new things at early stage i like to learn new things and perfection is my desire i try to get learn fast and getting knowledge is my aim.
I applied via Job Fair and was interviewed before Dec 2023. There was 1 interview round.
(1 Question)
- Q1. Strenghts/weaknesses
Interview Preparation Tips
Selected
I applied via Campus Placement and was interviewed before Jun 2022. There were 3 interview rounds.
(1 Question)
- Q1. How well do you know excel?
- Ans.
I have extensive experience with Excel, utilizing its features for data analysis, visualization, and reporting.
Proficient in using formulas like VLOOKUP, HLOOKUP, and INDEX-MATCH for data retrieval.
Skilled in creating pivot tables to summarize and analyze large datasets.
Experienced in data visualization using charts and graphs to present findings effectively.
Familiar with conditional formatting to highlight key data po...
(2 Questions)
- Q1. Resume based questions
- Q2. General discussion about work
I applied via Campus Placement and was interviewed before Aug 2022. There were 3 interview rounds.
The aptitude questions were bit easy and there were questions about SQL, and also excel sheets.
(1 Question)
- Q1. Questions about sql
Interview Preparation Tips
- SQL
- Excel
Basic Apititude Questions
(2 Questions)
- Q1. Difference between WHERE and HAVING??
- Q2. Where- Row Level Filters Having-Aggregate Filters
- Ans.
Row level filters are applied before aggregations, while aggregate filters are applied after aggregations.
Row level filters are used to filter individual rows of data before any aggregations are performed.
Aggregate filters are used to filter the aggregated results after the data has been grouped and summarized.
Row level filters are typically applied using WHERE clause in SQL, while aggregate filters are applied using H...
(2 Questions)
- Q1. Why do you wanna join Uber?
- Ans.
I want to join Uber to leverage data analytics in enhancing user experience and optimizing operations in a dynamic environment.
Passion for data-driven decision making: I enjoy analyzing data to uncover insights that can drive business strategies.
Innovative environment: Uber's commitment to innovation aligns with my desire to work in a forward-thinking company.
Impact on urban mobility: I am excited about contributing to...
- Q2. Best Company Ever
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Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed before Feb 2023. There were 4 interview rounds.
Approx 30 questions which are to be solved in 1 hour. Questions include logical and mathematical questions along with basic ML and stats questions
(1 Question)
- Q1. Basic questions related to Python and SQL
(1 Question)
- Q1. Advance SQL questions and 1 case study
(1 Question)
- Q1. Basic ML questions and Business acumen questions
Selected
I applied via Approached by Company and was interviewed before Jun 2023. There were 3 interview rounds.
It was basic MCQ related to Javascript
(1 Question)
- Q1. Asked basic questions related to array and SQL
(1 Question)
- Q1. Asked question to test the business context
It was easy consisting of sql and excel questions
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