100+ Sdet Interview Questions and Answers

Replace each number in an array with the product of all other numbers without using division.

• Iterate through the array and calculate the product of all numbers to the left of the current index.

• Then, iterate through the array again and calculate the product of all numbers to the right of the current index.

• Multiply the left and right products to get the final product and replace the current index with it.

Program to find the angle between the hands of a clock given the time.

• Calculate the angle of the hour hand from 12 o'clock position

• Calculate the angle of the minute hand from 12 o'clock position

• Calculate the absolute difference between the two angles

• If the difference is greater than 180 degrees, subtract it from 360 degrees

• Return the absolute value of the difference as the angle between the hands

Investigate the blank page issue after clicking the submit button to identify potential causes and solutions.

• Check for JavaScript errors in the console that may prevent page rendering.

• Verify if the form submission is correctly handled by the backend server.

• Inspect network requests to see if the submission returns a valid response.

• Ensure that the URL is correctly defined and not leading to a 404 error.

• Look for any infinite loops or redirects in the code that could cause a blan...read more

Program to find depth of binary search tree without recursion

• Use a stack to keep track of nodes and their depths

• Iteratively traverse the tree and update the maximum depth

• Return the maximum depth once traversal is complete

Faced a disagreement on testing strategy; facilitated discussion, aligned goals, and reached a consensus that improved our testing process.

• Identified the disagreement during a sprint planning meeting regarding automated vs. manual testing.

• Facilitated a discussion to understand each team member's perspective and concerns.

• Presented data on the efficiency of automated testing for regression scenarios, highlighting time savings.

• Proposed a hybrid approach that combined both strate...read more

Yes, I use console to locate elements in a web page for debugging and testing purposes.

• Yes, I use console commands like document.querySelector() or document.getElementById() to locate elements on a web page.

• Console is helpful for quickly testing and verifying element selectors before implementing them in automated tests.

• Using console to locate elements can help in identifying issues with element selection and improve test script efficiency.

Yes, I use the console to locate elements in web pages for debugging and testing purposes.

• I use the console to inspect elements and identify unique attributes like IDs, classes, or XPath.

• I can use commands like document.getElementById(), document.querySelector(), or $() to locate elements.

• I also use the console to test CSS selectors and verify if elements are being correctly identified.

I prioritize testing based on risk, user impact, and critical functionality to ensure quality within limited time.

• Identify critical functionalities: Focus on features that are essential for the product's core purpose, e.g., login for an e-commerce site.

• Assess risk: Evaluate which areas are most likely to fail or have the highest impact on users, such as payment processing.

• User impact: Prioritize tests that affect the largest number of users, like UI elements on the homepage.

• U...read more

Jenkins setup involves configuring jobs and updating reports for the team.

• Install Jenkins on a server or local machine

• Create a new job by selecting 'New Item' and choosing the job type

• Configure the job by setting up build triggers, source code management, build steps, and post-build actions

• Add plugins for reporting tools like JUnit or HTML Publisher to generate reports

• Update the report by viewing the job's build history and clicking on the specific build to see the report

Create a cache with fast look up that only stores the N most recently accessed items

• Implement a hash table with doubly linked list to store the items

• Use a counter to keep track of the most recently accessed items

• When the cache is full, remove the least recently accessed item

Find the maximum rectangle (in terms of area) under a histogram in linear time

• Use a stack to keep track of the bars in the histogram

• For each bar, calculate the area of the rectangle it can form

• Pop the bars from the stack until a smaller bar is encountered

• Keep track of the maximum area seen so far

• Return the maximum area

To automate API for retrieving AWS service IP allocations, we can use AWS CLI or SDKs.

• Use AWS CLI to retrieve IP allocations for a specific service

• Use AWS SDKs to programmatically retrieve IP allocations

• Create automated tests to ensure IP allocations are correct

• Use tools like Postman to test API endpoints

To handle dynamic web elements in a web table, I will use techniques like XPath, CSS selectors, and dynamic element identification.

• Use XPath to locate elements based on their attributes or position in the DOM

• Utilize CSS selectors to target specific elements based on their styling

• Implement dynamic element identification techniques to handle elements that change on page reloads or updates

To find the second largest number, iterate through the data while tracking the largest and second largest values.

• Initialize two variables: 'largest' and 'secondLargest' to negative infinity.

• Iterate through each number in the dataset.

• If the current number is greater than 'largest', update 'secondLargest' to 'largest' and then update 'largest' to the current number.

• If the current number is less than 'largest' but greater than 'secondLargest', update 'secondLargest' to the curre...read more

Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.

• Array is a static data structure with a fixed size, while ArrayList is a dynamic data structure that can grow or shrink in size.

• Arrays can hold primitive data types and objects, while ArrayList can only hold objects.

• Arrays require a specified size during initialization, while ArrayList can dynamically resize itself.

• Arrays use square brackets [] for declaration, while ArrayList is a p...read more

Approach for designing an automation framework

• Identify the scope and requirements of the framework

• Choose a suitable programming language and tools

• Design the framework architecture and modules

• Implement the framework and write test scripts

• Integrate the framework with CI/CD pipeline

• Continuously maintain and update the framework

A program to count the characters in a string

• Iterate through each character in the string and increment the count for each character

• Use a hashmap to store the count of each character

• Handle edge cases like empty string or null input

Implement 3 stacks in a single array efficiently

• Divide the array into 3 equal parts

• Use pointers to keep track of top of each stack

• Implement push and pop operations for each stack

• Handle stack overflow and underflow cases

Use Selenium to automate adding items to cart on Amazon website.

• Locate the 'Add to Cart' button on the product page using Selenium's findElement method

• Click on the 'Add to Cart' button to add the item to the cart

• Verify that the item has been successfully added to the cart by checking the cart contents

Git is a version control system used for tracking changes in code, while GitHub is a platform for hosting Git repositories and collaborating on code.

• Git is a distributed version control system that allows developers to track changes in code and collaborate with others.

• GitHub is a web-based platform that provides hosting for Git repositories, allowing developers to store, share, and collaborate on code.

• Git can be used locally on a developer's machine, while GitHub is a cloud-b...read more

Create a stack using 2 given queues.

• Push elements into one queue until it is full.

• When the first queue is full, push new elements into the second queue.

• To pop an element, remove all elements from the non-empty queue except the last one.

• Switch the non-empty queue to the other one when it becomes empty.

I am currently working with Java and Selenium for test automation.

• Using Java programming language for writing test scripts

• Using Selenium WebDriver for automating web applications

• Integrating with CI/CD tools like Jenkins for continuous testing

• Working with frameworks like TestNG for test management

• Using tools like Maven for project management

Automating email and one time passcode involves using automation tools and scripting to send emails and generate passcodes.

• Use automation tools like Selenium or Puppeteer to automate the process of logging into email accounts and sending emails.

• Utilize scripting languages like Python or JavaScript to generate one time passcodes and send them via email.

• Implement API calls to interact with email servers and send emails programmatically.

• Consider using third-party services like T...read more

Comparing two databases and two files involves analyzing their structure, content, and integrity.

• Compare the schema of the databases to ensure they have the same tables, columns, and relationships.

• Check the data in the databases and files to identify any discrepancies or missing information.

• Use checksums or hash functions to compare the contents of the files for differences.

• Consider using tools like SQL queries, file comparison software, or scripting languages for efficient c...read more

To exit recursion in programming, a base case is defined to stop the recursive calls.

• Define a base case that will stop the recursive calls.

• Ensure that the base case is reached during the recursion.

• Return a value or perform an action when the base case is met.

Integrating Selenium framework with Jenkins involves setting up Jenkins job to run Selenium tests.

• Install Jenkins on the server

• Install necessary plugins like Selenium plugin

• Create a Jenkins job for running Selenium tests

• Configure the job to execute Selenium tests using the Selenium framework

• Set up build triggers and post-build actions as needed

OOPS is Object-Oriented Programming, Inheritance is the ability of a class to inherit properties and behavior from another class, Static Binding is resolved at compile time, Dynamic Binding is resolved at runtime.

• OOPS stands for Object-Oriented Programming, which is a programming paradigm based on the concept of objects.

• Inheritance is a feature in OOP that allows a class to inherit properties and behavior from another class.

• Static Binding is also known as early binding, where...read more