LinkedIn Softwaretest Engineer Interview Questions and Answers

3 question of DSA in Online assesment

Q1. DSA Question the candy problem
Ans. 
The candy problem involves distributing candies to children based on their ratings while ensuring fairness.
• Each child must receive at least one candy.

• Children with a higher rating than their neighbors receive more candies.

• Example: Ratings [1, 0, 2] results in candies [2, 1, 2].

• Use a two-pass algorithm: one from left to right, and another from right to left.
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The first round is OA and the majority questions are from leet code or similar

Q1. Second round is one to one and be ready for coding as well as some behavioural
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Q2. Leet code questions of easy to medium level
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Q1. The third round is also same as second and sometimes they go for 3rd also
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Q2. Leet code of medium level
Ans. 
Find the longest substring with at most k distinct characters.
• Use a sliding window approach to keep track of the distinct characters in the substring.

• Keep track of the start and end indices of the current substring.

• Update the start index of the substring when the number of distinct characters exceeds k.

• Update the end index of the substring and the length of the longest substring when a new longest substring is found.
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Q3. Explain an indecent when you failed in your task
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Q1. Why do you chose this role
Ans. 
I chose this role to combine my passion for technology with my desire to ensure software quality and user satisfaction.
• I have always been passionate about technology and software development, and this role allows me to work closely with both.

• Quality assurance is crucial in software development; I want to contribute to creating reliable and user-friendly applications.

• I enjoy problem-solving and analytical thinking, whic...read more
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Q2. What are black box testing techniques
Ans. 
Black box testing evaluates software functionality without knowledge of internal code structure.
• Equivalence Partitioning: Divides input data into valid and invalid partitions. Example: Testing a login form with valid and invalid credentials.

• Boundary Value Analysis: Tests values at the boundaries of input ranges. Example: Checking age input fields for values like 17, 18, and 19.

• Decision Table Testing: Uses a table to re...read more
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Q3. What is regression testing
Ans. 
Regression testing ensures that new code changes do not adversely affect existing functionalities.
• Verifies that recent changes haven't introduced new bugs.

• Can be automated to save time and increase efficiency.

• Example: After adding a new feature, testing existing features to ensure they still work.

• Often performed after bug fixes or enhancements.

• Includes both manual and automated testing approaches.
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2 da questions based on maps and set

2 questions again on graph and dp

Q1. Design big basket service
Ans. 
Design a service for online grocery shopping with a wide range of products and delivery options.
• Create a user-friendly website or app for customers to browse and order groceries

• Implement a secure payment gateway for online transactions

• Integrate a robust inventory management system to track products and availability

• Offer various delivery options such as express delivery or scheduled delivery

• Provide customer support for ...read more
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Q1. Bar raiser and one graph question
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Sliding Window and Dynamic Programming questions

Q1. Why do you work in this company
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Q2. What expected salary this company
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Q3. When other company why not choose
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Q1. Best leadership principle
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Q2. Work experience
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Leetcode medium - given an array of words, determine how many