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Alibaba Group Big Data Engineer Interview Questions and Answers
Alibaba Group Big Data Engineer Interview Experiences
1 interview found
殷帅
(2 Questions)
- Q1. What's the diff bettween spark and hadoop mapreduce
- Ans.
Spark is faster than Hadoop MapReduce due to in-memory processing and supports multiple types of workloads.
Spark performs in-memory processing, while Hadoop MapReduce writes to disk after each task.
Spark supports multiple types of workloads like batch processing, interactive queries, streaming data, and machine learning, while Hadoop MapReduce is mainly for batch processing.
Spark provides higher-level APIs in Java, Sca...
- Q2. U can found it in net
Skills evaluated in this interview
Interview questions from similar companies
Anonymous
I applied via Company Website and was interviewed in Aug 2021. There were 2 interview rounds.
E-commerce
Interview Preparation Tips
Mahesh Agrawal
I applied via Job Portal and was interviewed in Jun 2021. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. Sort an array
- Ans.
Sorts an array of strings in ascending order.
Use a sorting algorithm like bubble sort, selection sort, or merge sort.
Compare adjacent elements and swap them if they are in the wrong order.
Repeat the process until the array is sorted.
Interview Preparation Tips
Skills evaluated in this interview
Interview Preparation Tips
Tips: Just try coding as much as you can in the four years of graduation.
Round: Interview
Experience: Three Coding Interview and a Behavioral Interview were conducted.
Tips: Try to get some prior knowledge about the company's infrastructure.w
General Tips: Practice as much problems as you can online or offline.
Skill Tips: Coding is the key for any software company.
Skills: Coding
College Name: IIT KHARAGPUR
Motivation: Its the best in business
Deepali Adlakha
Interview Questionnaire
3 Questions
- Q1. Some question on KMP
- Q2. Simulation Question
- Q3. Topological Sort Question
Interview Preparation Tips
Experience: Simple
Tips: Online Coding Questions
Duration: 60 minutes
Round: Technical Interview
Experience: Moderately difficult
Tips: Thorough understanding of all the algorithms is required.
Round: Technical Interview
Experience: Easy
Tips: Need to start a question afresh without attacking it the way you have solved questions in the past
Round: Technical Interview
Experience: Easy/moderately difficult
Tips: The idea was not that easy to click.
Skills: Coding
College Name: IIT BOMBAY
Motivation: Facebook has revolutionised social networking.
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
I appeared for an interview before Apr 2021.
(2 Questions)
Round duration - 60 minutes
Round difficulty - Medium
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.
- Q1.
Kth Largest Element Problem Statement
Given an array of distinct positive integers and a number 'K', your task is to find the K'th largest element in the array.
Example:
Input:
Array: [2,1,5,6,3,8], K ... - Ans.
Find the Kth largest element in an array of distinct positive integers.
Sort the array in non-increasing order
Return the Kth element from the sorted array
Handle multiple test cases
- Q2.
Orange Rotting Problem Statement
Consider a grid containing oranges. Each cell in this grid can hold one of three integer values:
- Value 0: Represents an empty cell.
- Value 1: Represents a fresh orang...
- Ans.
The task is to determine the minimum time required for all fresh oranges to become rotten in a grid.
Create a queue to store the rotten oranges and their time of rotting.
Iterate through the grid to find the initial rotten oranges and add them to the queue.
Perform BFS by popping each rotten orange from the queue, rot adjacent fresh oranges, and add them to the queue with updated time.
Continue until the queue is empty, ke...
Round duration - 45 minutes
Round difficulty - Easy
This was a design round.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I applied via Recruitment Consultant and was interviewed before Jul 2020. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. DS Algo Questions on Trees. Leadership Principles
Interview Preparation Tips
Rajesh Paramanandam
I appeared for an interview in Oct 2016.
Interview Preparation Tips
Experience: Aptitude was quite easy they just asked us basic questions from Math,logical reasoning and english
Tips: Just think well before u do..
Duration: 1 hour 30 minutes
Total Questions: 40
Round: Behavioural Interview
Experience: It was face to face .. the interviewee asked questions from our resume... Since I m from computer science background they asked some technical questions..
Tips: Beware filling ur resume.. they will ask every stuff that you have in resume
Round: Technical Interview
Experience: Discussion about my project that i vr done in my final year.they asked me what was my role in my project
College Name: Sri ganesh college of engineering and technology
Interview Preparation Tips
Experience: The first test
contained 25 objective questions encompassing the basics of Computer Science ranging from
data structures, networks and operating systems to theory of computation
Duration: 45 minutes
Total Questions: 25
Round: Test
Experience: The second test contained 3 coding questions.
Duration: 45 minutes
Total Questions: 3
Round: HR Interview
Experience: After the written test, next day I appeared for 3 interviews.
They were checking if you can write code and also if you are aware of the practical issues faced while coding. In the final round they were testing if you could abstract out a real world
problem into code.
Tips: Overall I can say that you must hope for the best and prepare for the
worst. So make sure that you are prepared on all counts. You never know what might go wrong.
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