Corecard Software QA Engineer Interview Questions and Answers

Q1. What is defect life cycle?
Ans. 
Defect life cycle is the process of identifying, reporting, fixing, and verifying defects in software development.
• Defect is identified by testers during testing

• Defect is reported to the development team

• Development team fixes the defect

• Fixed defect is verified by testers

• Defect is closed if it passes verification

• If defect fails verification, it is reopened and the cycle continues
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Q2. What ECP & BVA?
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ECP stands for Equivalence Class Partitioning and BVA stands for Boundary Value Analysis.
• ECP is a testing technique that divides input data into groups that are expected to exhibit similar behavior.

• BVA is a testing technique that focuses on testing values at the boundaries of input domains.

• ECP and BVA are used to identify defects in software and improve the quality of testing.

• For example, if a program accepts input val...read more
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Q1. Test scenarios for ATM
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Test scenarios for ATM
• Verify if the ATM is dispensing the correct amount of cash

• Check if the ATM is accepting valid cards and rejecting invalid ones

• Test if the ATM is able to handle multiple transactions at the same time

• Ensure that the ATM is providing proper instructions to the user

• Validate if the ATM is able to handle network connectivity issues
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Q1. Find connected components in a graph
Ans. 
Use Depth First Search (DFS) to find connected components in a graph
• Start by initializing all vertices as unvisited

• Iterate through each vertex and perform DFS to find connected components

• Keep track of visited vertices to avoid revisiting

• Example: For a graph with vertices {A, B, C} and edges {(A, B), (B, C)}, the connected components are {A, B, C}
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Q1. Design chess game
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Design a chess game with proper board setup, piece movements, and win conditions.
• Create a 8x8 grid to represent the chess board

• Assign initial positions to each type of chess piece (pawn, rook, knight, bishop, queen, king)

• Implement rules for each piece's movement (e.g. pawn moves forward, rook moves horizontally/vertically)

• Check for valid moves and capture opponent's pieces

• Implement win conditions (checkmate, stalemate)

• ...read more
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Q1. Introduce about yourself
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Q2. About my qualification
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Coding question on string manipulation like tell the type of card based on the string constraints of the given card number.

Implement the function "Printlast10lines" such that the program prints the last 10 (or less) in a given string

Q1. Delete nth node in a singe linked list
Ans. 
To delete the nth node in a single linked list, we need to find the (n-1)th node and update its next pointer.
• Traverse the linked list to find the (n-1)th node

• Update the next pointer of the (n-1)th node to skip the nth node

• Free the memory allocated to the nth node
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Screening round was a 1 hour coding test. Mostly non leetcode style where the question is incremental - Eg. Identify a pattern in a given text value and extract it then perform subsequent transformations. There is no right or wrong its just how well you are able to do the task.

Q1. Resume related system design deep dive
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Another round similar to the first one with an incremental coding test. Question was very lengthy.

Q1. SQL database and you need to find out what is wrong with the data
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Q1. Another coding round where you need to go clone a repo and extend an existing feature using the libraries in the documentation provided.
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