BigBasket Senior Software Development Test Engineer Interview Questions and Answers

Q1. Design pattern experience
Ans. 
I have extensive experience with various design patterns such as Singleton, Factory, Observer, and MVC.
• Implemented Singleton pattern to ensure only one instance of a class exists

• Utilized Factory pattern to create objects without specifying the exact class

• Implemented Observer pattern for event handling and notifications

• Utilized MVC pattern for separating concerns in a software application
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It was good and very informative

Q1. Strength weakness
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Q2. Why this company
Ans. 
I am impressed by the company's innovative projects, strong company culture, and opportunities for growth.
• Innovative projects such as the development of cutting-edge software solutions

• Strong company culture that values teamwork, collaboration, and employee well-being

• Opportunities for growth and advancement within the company, such as training programs and mentorship opportunities
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Q1. Given array of integer create subarray with sum = 0
Ans. 
Create subarrays with sum = 0 from given array of integers.
• Iterate through the array and keep track of the running sum.

• Store the running sum in a hashmap and check if the current sum - any previous sum equals 0.

• If yes, then the subarray between those two indices has a sum of 0.
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Q2. Left view of binary tree
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The left view of a binary tree is the set of nodes visible when the tree is viewed from the left side.
• Traverse the tree in a level order manner and keep track of the first node at each level.

• Use a queue to store nodes at each level and update the left view nodes accordingly.

• Example: For a binary tree with root node 1, left child 2, and right child 3, the left view would be [1, 2].
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Q1. Just a go thru life and career
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Q2. What are 3 weaknesses
Ans. 
Three weaknesses include lack of experience in a specific technology, difficulty with time management, and tendency to overthink solutions.
• Lack of experience in a specific technology (e.g. not familiar with a certain programming language or framework)

• Difficulty with time management (e.g. struggling to prioritize tasks effectively)

• Tendency to overthink solutions (e.g. spending too much time analyzing a problem before ta
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Implement boolean canConstruct(String targetString, String[] dict) which returns true if we can construct the targetString by concatenating the words given in the dictionary

Q1. Implement key value store
Ans. 
Implement a key value store for storing and retrieving data efficiently.
• Use a hash table or a balanced tree data structure to store key-value pairs.

• Implement functions for inserting, updating, deleting, and retrieving key-value pairs.

• Consider implementing features like transactions, concurrency control, and data persistence.

• Example: Implement a simple key value store using a hash table in Python.
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Q1. Introduction about yourself and expectation
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Q1. IOS questions and architecture question about modularisation. From resume.
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Q2. Question Asked about memory management
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Q3. Question about modularisation and interface design
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Q1. What is SDLC &STLC
Ans. 
SDLC (Software Development Life Cycle) is the process of planning, creating, testing, and deploying software. STLC (Software Testing Life Cycle) is the process of testing software to ensure quality.
• SDLC involves stages like planning, design, development, testing, deployment, and maintenance.

• STLC involves stages like test planning, test design, test execution, and test closure.

• SDLC focuses on the overall software develo...read more
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Q2. Smoke & sanity testing
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Q1. About project of previous organization
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Q2. Test case writing
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Q1. Salary discussion
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