20+ QA Test Lead Interview Questions and Answers

To get non-repeating substring from a string, we can use the sliding window technique.

• Create a hash set to store the characters in the current window.

• Iterate through the string and add each character to the hash set.

• If a repeating character is found, remove the first character from the hash set and move the window.

• Keep track of the longest non-repeating substring found so far.

• Return the longest non-repeating substring.

As a QA lead, effective team management involves communication, motivation, and conflict resolution.

• Establish clear communication channels: Regular stand-ups can help keep everyone aligned.

• Foster a collaborative environment: Encourage team members to share ideas and solutions.

• Provide constructive feedback: Use specific examples to guide improvement, such as code reviews.

• Recognize and reward achievements: Celebrate milestones to boost morale, like team lunches for successful r...read more

A program to count the number of characters in a given string.

• Iterate through each character in the string and increment a counter for each character encountered.

• Use a hashmap to store the count of each character for efficient counting.

• Handle edge cases such as empty string or null input.

Product backlog is a prioritized list of features to be developed. Sprint backlog is a subset of product backlog for a specific sprint.

• Product backlog is a dynamic document that evolves with the product development cycle

• It contains a list of features, enhancements, bug fixes, and other work items

• The items in the backlog are prioritized based on business value, risk, and other factors

• Sprint backlog is a subset of product backlog for a specific sprint

• It contains a list of items...read more

Defect triage call is a meeting where the team discusses and prioritizes the defects found during testing.

• Defect triage call is a collaborative effort to prioritize defects based on their severity and impact on the system.

• The team discusses each defect and decides whether it needs to be fixed immediately or can be deferred to a later release.

• The call is usually attended by the QA lead, developers, project manager, and other stakeholders.

• The outcome of the call is a list of de...read more

Velocity is the amount of work a team can complete in a sprint. Zero sprint is a sprint with no completed work.

• Velocity is a measure of a team's productivity in completing work during a sprint

• It is calculated by adding up the story points or tasks completed in a sprint

• Zero sprint is a sprint where no work is completed due to unforeseen circumstances or issues

• It is important to track velocity to help plan future sprints and estimate project timelines

It is not possible to multiply 2 strings in a mathematical sense.

• Strings can be concatenated using the + operator.

• To repeat a string, use the * operator followed by the number of repetitions.

• To convert a string to a number, use the parseInt() or parseFloat() functions.

Bug life cycle is the process of identifying, reporting, tracking, and resolving software defects.

• Bug is identified by testers during testing phase

• Bug is reported to development team

• Bug is assigned to a developer for fixing

• Bug is retested by testers after fixing

• Bug is closed if it passes retesting or reopened if it fails

• Bug is verified in subsequent releases to ensure it does not reoccur

Serialization is the process of converting an object into a byte stream, while deserialization is the reverse process.

• Serialization is used to persist object state or transmit objects over a network.

• Deserialization is used to reconstruct the object from the byte stream.

• In Java, serialization is achieved by implementing the Serializable interface.

• Example: ObjectOutputStream for serialization and ObjectInputStream for deserialization.

Dynamic elements in Selenium can be handled using various techniques like explicit waits, fluent waits, and dynamic xpath.

• Use explicit waits to wait for a specific condition to be met before proceeding with the test

• Use fluent waits to wait for a specific element to be visible or clickable

• Use dynamic xpath to locate elements based on changing attributes or values

SQL injection is a type of cyber attack where malicious SQL code is inserted into input fields to manipulate a database.

• SQL injection occurs when an attacker inserts malicious SQL code into input fields on a website.

• This can allow the attacker to access, modify, or delete data from the database.

• Preventing SQL injection involves using parameterized queries and input validation.

• Example: Entering ' OR 1=1--' into a login form to bypass authentication.

A program to write the Fibonacci series using iterative or recursive methods.

• Use a loop to generate Fibonacci series iteratively

• Use recursion to generate Fibonacci series recursively

• Start with 0 and 1 as the first two numbers in the series

• Add the previous two numbers to get the next number in the series

BDD framework is a software development process that encourages collaboration between developers, QA, and non-technical stakeholders.

• BDD stands for Behavior Driven Development

• Uses plain English to describe the behavior of an application

• Focuses on the behavior of the system rather than implementation details

• Uses tools like Cucumber, JBehave, SpecFlow

• Helps in creating automated tests that are easy to understand by non-technical stakeholders

This problem involves generating or identifying a specific number pattern in C#.

• Identify the pattern: Understand the sequence (e.g., Fibonacci, prime numbers).

• Use loops: Implement for or while loops to generate the sequence.

• Arrays: Store the generated numbers in an array for further processing.

• Example: For Fibonacci, use: int[] fib = new int[n]; fib[0] = 0; fib[1] = 1; for (int i = 2; i < n; i++) { fib[i] = fib[i-1] + fib[i-2]; }

SDLC stands for Software Development Life Cycle, which is a process used by software development teams to design, develop, and test high-quality software.

• SDLC is a structured process that consists of several phases such as planning, analysis, design, implementation, testing, and maintenance.

• Each phase has its own set of activities and deliverables that contribute to the overall success of the software project.

• Examples of SDLC models include Waterfall, Agile, and DevOps, each ...read more

Wait statements in Selenium are used to pause the execution of the test script for a specified amount of time.

• Wait statements are used to handle synchronization issues in test automation scripts.

• There are two types of wait statements in Selenium: Implicit Wait and Explicit Wait.

• Implicit Wait sets a default waiting time for the elements to be available before throwing an exception.

• Explicit Wait allows the test script to wait for a certain condition to occur before proceeding f...read more

Selectors in Selenium are used to identify web elements on a webpage for automation testing.

• Selectors include ID, class name, name, tag name, link text, partial link text, CSS selector, and XPath.

• ID selector is the fastest and most reliable, while XPath is the most powerful but slower.

• CSS selectors are commonly used due to their flexibility and readability.

• Example: driver.findElement(By.id("elementID"));

I have 8 years of experience in QA testing, including manual and automated testing.

• Experience in creating test plans, test cases, and test scripts

• Proficient in using testing tools like Selenium, JIRA, and TestRail

• Strong knowledge of different testing methodologies (e.g., black box, white box, regression)

• Experience in testing web applications, mobile apps, and APIs

• Familiarity with Agile and Scrum methodologies

• Experience in leading a team of QA testers

• Ability to identify and re...read more

SQL joins combine rows from two or more tables based on related columns.

• INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM A INNER JOIN B ON A.id = B.a_id;

• LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.a_id;

• RIGHT JOIN: Returns all records from the right table and matched records from the left table. Example: SELECT * FROM A RIGHT JOIN B ON A.id =...read more