Aloha Technology QA Engineer Interview Questions, Process, and Tips

Apitude test with coding test two sql questions,

Q1. What is ETL, Layers of ETL, Do you know any ETL automation tool
Ans. 
ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database.
• ETL involves three main layers: Extraction, Transformation, and Loading.

• Extraction: Data is extracted from various sources such as databases, files, APIs, etc.

• Transformation: Data is cleaned, validated, and transformed into a consistent format.

• Load...read more
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Q2. Python star pattern 1 12 123, Differnce between List and Dictionary
Ans. 
Python star pattern 1 12 123 is a pattern printing question. List and Dictionary are data structures in Python.
• Python star pattern 1 12 123 can be achieved using nested loops.

• Lists are ordered collections of items, accessed by index. Dictionaries are key-value pairs, accessed by key.

• Example: List - [1, 2, 3], Dictionary - {'a': 1, 'b': 2, 'c': 3}
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Q3. 10-12 Queries based on joins, max function etc, difference between rank, dense rank, row_number and its syntax, how to combine two columns without concat function. What is Alias. What is the use of partiti...read more
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Q4. Do you know GCP? Do you know bigquery?
Ans. 
Yes, I am familiar with Google Cloud Platform (GCP) and BigQuery.
• I have experience working with GCP services such as Compute Engine, Cloud Storage, and BigQuery.

• I have used BigQuery for analyzing large datasets and running complex queries.

• I am familiar with setting up data pipelines and ETL processes using GCP services.
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Q5. Q based on resume Shell scripting commands what is -x what is chmod 757 on owner group and others
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Q6. What is SDLC, STLC
Ans. 
SDLC stands for Software Development Life Cycle and STLC stands for Software Testing Life Cycle.
• SDLC is a process used by software development teams to design, develop, and test high-quality software.

• STLC is a subset of SDLC focused specifically on the testing phase of the software development process.

• SDLC includes phases like planning, analysis, design, implementation, and maintenance.

• STLC includes phases like test pl...read more
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Round duration - 40 minutes
Round difficulty - Medium

Asked about time complexity of algorithm, puzzles, DBMS, cutting edge technologies etc. What are indexes?

Q1. 
Flip Bits Problem Explanation
Given an array of integers ARR of size N, consisting of 0s and 1s, you need to select a sub-array and flip its bits. Your task is to return the maximum count of 1s that can b...read more
Ans. 
Given an array of 0s and 1s, find the maximum count of 1s by flipping a sub-array at most once.
• Iterate through the array and keep track of the maximum count of 1s obtained by flipping a sub-array.

• Consider flipping a sub-array from index i to j and calculate the count of 1s in the resulting array.

• Return the maximum count of 1s obtained by flipping a sub-array at most once.
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Round duration - 20 minutes
Round difficulty - Medium

Asked 1 standard algorithm

Q1. 
Number of Islands Problem Statement
You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...read more
Ans. 
Count the number of islands in a 2D matrix of 1s and 0s.
• Iterate through the matrix and perform depth-first search (DFS) to find connected 1s.

• Mark visited cells to avoid redundant traversal.

• Increment island count whenever a new island is encountered.
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Q1. What your biggest achievement while working on your previous firm
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Q2. Which domain you're working in last company
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Q3. Which version visual c# you work on?
Ans. 
I work on Visual C# 2019.
• I primarily work on Visual C# 2019 for my software development projects.

• I have experience with Visual C# 2017 and earlier versions as well.

• Visual C# 2019 offers new features and improvements over previous versions.
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Q4. How many projects you work and descrive it's achievement?
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Q5. Have you ever work directly with client
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