Mphasis Senior Automation Test Engineer Interview Questions and Answers

Q1. What are the keywords used in Java
Ans. 
Keywords in Java are reserved words that have special meaning and cannot be used as identifiers.
• public

• static

• void

• class

• extends
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Q1. Write a program to print occurrence of character from a given string
Ans. 
Program to print occurrence of characters in a given string
• Create a map to store characters and their counts

• Iterate through the string and update the counts in the map

• Print the characters and their counts from the map
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Q2. Write a program to find sum of any two elements in an array is equal to x?(x=-1)
Ans. 
Program to find sum of any two elements in an array equal to -1
• Iterate through the array and for each element, check if there exists another element whose sum is equal to -1

• Use a hashmap to store the elements and their indices for faster lookup

• Handle edge cases like empty array or array with less than 2 elements

• Example: For array [-2, 3, 5, -3, 8], the pairs (-2, 1) and (3, -3) have sum equal to -1
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Q3. Find xpath for a given element
Ans. 
Use browser developer tools to inspect element and generate xpath
• Inspect element using browser developer tools

• Right click on element and select 'Copy' -> 'Copy XPath'

• Modify generated xpath if needed to make it more robust
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Q1. What is overloading and overriding ? What are locators in Selenium? What is the syntax of xpath locator ? What are the methods to write the test cases? Is it mandatory to have input tag in defining xpath?
Ans. 
Answers to questions related to automation testing using Selenium
• Overloading is when a method has the same name but different parameters in the same class, while overriding is when a subclass provides its own implementation of a method already defined in its superclass

• Locators in Selenium are used to identify web elements on a web page

• The syntax of xpath locator is //tagname[@attribute='value']

• Methods to write test cas...read more
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Q1. Tell me about yourself Java basic questions Selenium basic questions
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Q1. Java coding Selenium date picker Testing framework
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Q1. Code to print the no of Times the letters present in a string
Ans. 
Code to count the occurrences of each letter in a string and print the result
• Iterate through each character in the string

• Use a dictionary to store the count of each letter

• Print the count of each letter at the end
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Q2. What are the ways to start a Appium server
Ans. 
Appium server can be started using command line, programmatically in code, or using Appium desktop app.
• Start Appium server using command line by running 'appium' command

• Start Appium server programmatically in code using Appium server programmatically in code using AppiumDriverLocalService class

• Start Appium server using Appium desktop app by launching the app and starting the server
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Q3. How to run tests parallel for mobile devices
Ans. 
Tests can be run parallel for mobile devices using test automation frameworks like Appium or Espresso.
• Use test automation frameworks like Appium or Espresso to run tests parallel for mobile devices

• Leverage cloud-based testing platforms like Sauce Labs or BrowserStack for parallel testing on multiple devices

• Implement parallel test execution using tools like TestNG or JUnit in combination with Appium or Espresso

• Utilize d...read more
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Q4. How do you automate otp in mobile
Ans. 
Automating OTP in mobile involves using automation tools to interact with the OTP input field and validate the received OTP.
• Use automation tools like Appium or Espresso to interact with the OTP input field

• Extract the OTP from the message received on the mobile device

• Validate the extracted OTP with the OTP input field

• Handle scenarios where OTP validation fails
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Q5. What are desired capabilities
Ans. 
Desired capabilities are a set of properties or attributes that define the behavior of a browser or mobile device in Selenium automation testing.
• Desired capabilities are key-value pairs that are used to configure the WebDriver instances in Selenium.

• They can be used to set properties like browser name, version, platform, and other settings.

• For example, setting 'browserName' to 'chrome' will launch the Chrome browser dur
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Q6. How do you tell appium to run tests on ios or Android devices
Ans. 
To run tests on iOS or Android devices using Appium, specify the platformName capability in desired capabilities.
• Specify platformName capability as 'iOS' for iOS devices and 'Android' for Android devices

• Include other necessary desired capabilities like deviceName, platformVersion, appPackage, appActivity, etc.

• Example: capabilities.setCapability('platformName', 'iOS');
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Q7. How to set up automation for ios devices
Ans. 
Setting up automation for iOS devices involves using tools like Appium and Xcode for testing mobile applications.
• Install Xcode on your Mac machine

• Set up Appium for iOS automation

• Connect your iOS device to the Mac machine

• Create test scripts using Appium for iOS apps

• Execute the test scripts on the connected iOS device
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Q1. Initially HR called me and asked about experience. There was 1 technical round in which they ask some basic coding questions and programs on online compiler. And last 1 managerial round happend
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Q2. In python some List, String and Dictionary related problems. and 2-3 small programs on coding
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Q1. In Manager round they ask me one scenario of ATM logic and ask to write 1 program for it
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Round duration - 75 minutes
Round difficulty - Medium

This was an online coding round where we had 2 questions to solve under 75 minutes. I found both the questions to be of Easy to Medium level of difficulty.

Q1. 
Line Reflection Problem Statement
You are given several sets of points on a 2D plane, each set represented as a list of coordinates. Your task is to determine if there exists a line parallel to the Y-axis...read more
Ans. 
The task is to determine if there exists a line parallel to the Y-axis that reflects given points symmetrically.
• Iterate through each test case and check if a vertical reflection line exists for the given points

• Calculate the midpoint of the x-coordinates and check if it reflects the points symmetrically

• Consider edge cases where points are on the reflection line or have the same x-coordinate
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Q2. 
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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Round duration - 60 minutes
Round difficulty - Medium

This round had 2 coding questions followed by some questions from DBMS.

Q1. 
Largest Rectangle in Histogram Problem Statement
You are given an array/list HEIGHTS of length N, where each element represents the height of a histogram bar. The width of each bar is considered to be 1.
...read more
Ans. 
Find the area of the largest rectangle that can be formed within the bounds of a given histogram.
• Iterate through the histogram bars and calculate the area of the largest rectangle that can be formed using each bar as the height.

• Use a stack to keep track of the indices of the bars in non-decreasing order of height.

• Pop elements from the stack and calculate the area until a smaller height bar is encountered.

• Update the max...read more
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Q2. 
Valid Parentheses Problem Statement
Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.
Input:
The first line contains an...read more
Ans. 
The task is to determine if a given string consisting of parentheses is balanced or not.
• Iterate through the characters of the string and use a stack to keep track of opening parentheses.

• If an opening parenthesis is encountered, push it onto the stack.

• If a closing parenthesis is encountered, check if it matches the top of the stack. If it does, pop the stack, else the string is not balanced.

• At the end, if the stack is e...read more
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Q3. Can you explain the concept of ACID properties in DBMS?
Ans. 
ACID properties in DBMS ensure data integrity and consistency in transactions.
• Atomicity: All operations in a transaction are completed successfully or none at all.

• Consistency: Data is always in a valid state before and after a transaction.

• Isolation: Transactions are isolated from each other to prevent interference.

• Durability: Once a transaction is committed, changes are permanent and survive system failures.

• Example: If...read more
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Q4. Can you explain the different levels of data abstraction in a DBMS?
Ans. 
Levels of data abstraction in a DBMS refer to the different views of data provided to users and applications.
• Physical level: Deals with how data is stored on the storage media. Example: data blocks, pages, indexes.

• Logical level: Focuses on how data is represented to users. Example: tables, views, constraints.

• View level: Provides a customized view of the database for specific users or applications. Example: queries, rep
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Round duration - 60 minutes
Round difficulty - Medium

Standard DS/Algo round with 2 coding questions followed by 2 interesting puzzles.

Q1. 
Cycle Detection in Undirected Graph Problem Statement
You are provided with an undirected graph containing 'N' vertices and 'M' edges. The vertices are numbered from 1 to 'N'. Your objective is to determi...read more
Ans. 
Detect if an undirected graph contains a cycle by exploring all possible paths.
• Use Depth First Search (DFS) algorithm to traverse the graph and detect cycles.

• Maintain a visited set to keep track of visited vertices and a parent pointer to avoid visiting the same vertex twice.

• If a visited vertex is encountered that is not the parent of the current vertex, a cycle is present.

• Consider edge cases like disconnected graphs a
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Q2. 
Maximum 1s in a Row Problem
Given a matrix ARR with dimensions N * M, consisting only of 0s and 1s where each row is sorted, determine the index of the row that contains the highest number of 1s. If multi...read more
Ans. 
Find the row with the maximum number of 1s in a sorted matrix.
• Iterate through each row of the matrix and count the number of 1s in each row

• Keep track of the row index with the maximum number of 1s

• Return the index of the row with the highest count of 1s
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Q3. You have two wires of different lengths, each taking different amounts of time to burn completely. How can you use these wires to measure a specific duration of time?
Ans. 
By lighting both wires at the same time, the shorter wire will burn out first, allowing you to measure a specific duration of time.
• Light both wires at the same time

• Measure the time it takes for the shorter wire to burn out completely

• The remaining length of the longer wire will indicate the specific duration of time
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Q4. You have 3 ants located at the corners of a triangle. The challenge is to determine the movement pattern of the ants if they all start moving towards each other. What will be the outcome?
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