Trellix Senior QA Engineer Interview Questions and Answers

Q1. Given a String contains only 0s, 1s and 2s, count the number of sub strings that have equal number of 0s, 1s, and 2s. Input : str = "0102010" output : 2. Very Hard question is being asked in interview for...read more
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Count the number of substrings with equal number of 0s, 1s, and 2s in a given string.
• Iterate through the string and maintain counts of 0s, 1s, and 2s encountered so far.

• Keep track of the counts in a hashmap and increment the count of substrings whenever counts of 0s, 1s, and 2s are equal.

• Return the total count of substrings at the end.
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Q2. Group of anagrams together. input : ["eat", "tea", "tan", "ate", "nat", "bat"] output : [["eat" ,"tea", "ate"],["tan", "nat"],["bat"]] This is another hard level question is asked in interview for the QA p...read more
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Group anagrams together in an array of strings.
• Create a hashmap to store sorted strings as keys and corresponding anagrams as values.

• Iterate through the input array, sort each string, and add it to the hashmap.

• Return the values of the hashmap as the grouped anagrams.
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Q1. Java related qs
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Q1. SIP Call flow with headers
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SIP call flow involves signaling and media exchange between SIP devices with headers containing important information.
• SIP INVITE message is sent to initiate a call

• SIP 1xx responses indicate call progress

• SIP 2xx response confirms call establishment

• SIP ACK message acknowledges call setup

• SIP BYE message terminates the call
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Q2. SIP mandatory headers
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Q1. SERVICE ROUTE,PATH AND RECORD ROUTE HEADER
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Q2. K8's Deployment
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K8's Deployment refers to the deployment of applications on Kubernetes clusters.
• Kubernetes (K8s) is an open-source container orchestration platform used for automating deployment, scaling, and management of containerized applications.

• K8s Deployment involves defining the desired state of the application, creating deployment configurations, and managing the deployment process.

• Deployment resources in K8s include Pods, Rep...read more
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Q1. What is oops ?
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Object-oriented programming paradigm that focuses on objects and classes for code organization and reusability.
• Encapsulation: bundling data and methods that operate on the data into a single unit (object)

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details an
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Q2. Method overloading and overriding
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General topics like Artificial Intelligence positive or negative impacts

Q1. Everything from resume
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Q1. General questions
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Q1. Find the second largest number in an array
Ans. 
Iterate through array to find second largest number
• Iterate through the array and keep track of the largest and second largest numbers

• Handle edge cases like duplicates or small array sizes

• Return the second largest number found
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Q2. Other technical questions around java, oops, automation frameworks, testng, manual testing and test case creation.
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Written with multiple question both aptitude and technical

Q1. What is regression and smoke testing
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Regression testing is retesting of previously tested functionality to ensure that changes or fixes have not introduced new defects. Smoke testing is a subset of regression testing that focuses on testing the critical functionalities of an application.
• Regression testing is performed to verify that changes or fixes in software have not introduced new defects or caused existing functionalities to fail.

• It involves retestin...read more
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Q1. Roles and responsibilities in your previous project and what is your contribution for project delivery
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Q1. Why should we hire you
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Q1. What is the STLC, bug severity priority, waits in selenium with syntax, Java oops question with example,
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STLC, bug severity priority, waits in Selenium, Java OOPs
• STLC stands for Software Testing Life Cycle and includes phases like requirement analysis, test planning, test design, test execution, and test closure

• Bug severity is the impact of a bug on the system, while bug priority is the order in which bugs should be fixed

• Waits in Selenium are used to make the test script wait for a certain condition to be met before proce...read more
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