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QBurst Technologies Interview Questions and Answers
83 Interview questions
ENTRYPOINT and CMD define how a Docker container starts, but they serve different purposes and can be used together.
ENTRYPOINT: Specifies the command that will always run when the container starts, making it the primary command.
CMD: Provides default arguments for the ENTRYPOINT command or can be used alone to specify a command to run.
Example of ENTRYPOINT: 'ENTRYPOINT ["/usr/bin/python3", "-m", "http.server"]' ens...
Managing high incoming traffic involves scaling, load balancing, and optimizing resources to ensure system reliability and performance.
Load Balancing: Distributing incoming traffic across multiple servers using tools like NGINX or AWS Elastic Load Balancer to prevent any single server from becoming a bottleneck.
Auto-Scaling: Implementing auto-scaling groups in cloud environments (e.g., AWS, Azure) to automatically...
Troubleshooting a non-responsive server involves systematic checks of hardware, software, and network components to identify issues.
Check Server Status: Use tools like 'ping' or 'traceroute' to see if the server is reachable and to identify where the connection fails.
Review Logs: Examine system logs (e.g., /var/log/syslog) for any error messages or warnings that could indicate the cause of the issue.
Resource Utili...
Use Java Streams to count character occurrences in a string and find the most frequent one efficiently.
Utilize Java Streams to process the string: `string.chars()` converts to an IntStream.
Group characters using `Collectors.groupingBy()` to count occurrences.
Sort the map by values to find the maximum occurrence: `map.entrySet().stream().max(Map.Entry.comparingByValue())`.
Example: For input 'hello', the output shou...
The singleton design pattern ensures a class has only one instance and provides a global point of access to it.
Restricts instantiation of a class to a single object.
Provides a global access point to that instance.
Commonly used for configuration settings, logging, and thread pools.
Example in Java: Use a private constructor and a static method to get the instance.
Thread-safe implementations can be achieved using syn...
An outer join retrieves records from both tables, including unmatched rows from one or both sides.
Outer joins can be LEFT, RIGHT, or FULL, depending on which table's unmatched rows you want to include.
Example of LEFT JOIN: SELECT * FROM A LEFT JOIN B ON A.id = B.a_id; // Includes all from A and matched from B.
Example of RIGHT JOIN: SELECT * FROM A RIGHT JOIN B ON A.id = B.a_id; // Includes all from B and matched f...
GO uses goroutines and channels to handle concurrency efficiently.
GO uses goroutines to achieve concurrency. Goroutines are lightweight threads managed by the Go runtime.
Channels are used to communicate between goroutines. They provide a safe way to pass data between concurrent processes.
GO also has a built-in 'sync' package for synchronization primitives like mutexes and wait groups.
GO's 'select' statement allows...
Yes, I always have a backup plan in case of unexpected issues during testing.
Always have a backup plan in case of unexpected issues during testing
Backup plan may include using different testing tools or approaches
Having a backup plan ensures smooth testing process even in challenging situations
Prototype chaining is the mechanism in JavaScript where an object inherits properties and methods from another object.
In JavaScript, each object has a prototype property which points to another object. When a property is accessed on an object, if it doesn't exist on the object itself, JavaScript looks for it in the prototype chain.
If the property is not found in the immediate prototype, JavaScript continues to loo...
Promises in Node.js are objects representing the eventual completion or failure of an asynchronous operation.
Promises are used to handle asynchronous operations in a more readable and manageable way.
They can be in one of three states: pending, fulfilled, or rejected.
Promises can be chained using .then() to handle success and .catch() to handle errors.
Example: const myPromise = new Promise((resolve, reject) => { .....
QBurst Technologies Interview Experiences
81 interviews found
Swapnil Potdar
I applied via Naukri.com and was interviewed in Nov 2022. There were 2 interview rounds.
(19 Questions)
- Q1. Different variables in postman tool?
- Ans.
Postman tool has various variables like environment, global, collection, local, etc.
Environment variables: Used to store values that can be used across requests in a specific environment
Global variables: Used to store values that can be used across requests in all environments
Collection variables: Used to store values that can be used across requests in a specific collection
Local variables: Used to store values that ca...
- Q2. Status codes and their meaning ?
- Ans.
Status codes are numerical codes that indicate the status of a HTTP request/response.
Status codes are grouped into 5 categories: informational, success, redirection, client error, and server error.
Informational codes (1xx) indicate that the request was received and understood.
Success codes (2xx) indicate that the request was successfully received, understood, and accepted.
Redirection codes (3xx) indicate that further a...
- Q3. Abstract class vs Interface
- Ans.
Abstract class is a class that cannot be instantiated while Interface is a contract that a class can implement.
Abstract class can have both abstract and non-abstract methods while Interface can only have abstract methods.
A class can implement multiple interfaces but can only inherit from one abstract class.
Abstract class can have constructors while Interface cannot.
Abstract class can have instance variables while Inter...
- Q4. What is network latency testing?
- Ans.
Network latency testing is the process of measuring the delay in data transmission over a network.
It involves sending data packets from one point to another and measuring the time taken for the response to be received.
Latency can be affected by factors such as network congestion, distance, and hardware limitations.
Tools such as ping and traceroute can be used to perform network latency testing.
The results of network la...
- Q5. What is performance testing ? Do you know Jmeter ?
- Ans.
Performance testing is the process of evaluating the speed, responsiveness, stability, and scalability of a software application.
It involves simulating real-world scenarios to measure the application's performance under different loads.
JMeter is a popular open-source tool used for performance testing.
It can be used to test web applications, APIs, and databases.
JMeter allows testers to create and execute test plans, gen...
- Q6. How you perform mobile testing ?
- Ans.
Mobile testing is performed by creating test cases, selecting devices, and using automation tools.
Create test cases based on requirements and user scenarios
Select devices based on market share and user demographics
Use automation tools like Appium or Selenium for functional and regression testing
Perform manual testing for usability, accessibility, and compatibility
Test for network connectivity, battery usage, and perfor...
- Q7. What is UAT testing and how you do this ?
- Ans.
UAT testing is User Acceptance Testing, where end-users test the software to ensure it meets their requirements.
UAT testing is the final phase of testing before the software is released to the end-users.
It is performed by end-users or a representative group of end-users.
The goal of UAT testing is to ensure that the software meets the business requirements and is fit for purpose.
UAT testing can be performed manually or ...
- Q8. Drop vs Delete vs Truncate
- Ans.
Difference between Drop, Delete and Truncate commands in SQL
DROP command deletes the entire table along with its structure
DELETE command deletes specific rows from the table
TRUNCATE command deletes all the rows from the table but keeps the structure intact
DROP and TRUNCATE cannot be rolled back, but DELETE can be rolled back
- Q9. Asked one SQL complex query
- Ans.
A complex SQL query often involves multiple joins, subqueries, and aggregate functions to retrieve specific data.
Use JOINs to combine rows from two or more tables based on a related column.
Subqueries can be used to filter results based on the results of another query.
Aggregate functions like COUNT(), SUM(), AVG() help summarize data.
Example: SELECT department, COUNT(*) FROM employees GROUP BY department HAVING COUNT(*)...
- Q10. How you test mobile application ?
- Ans.
I test mobile applications by performing functional, usability, performance, and security testing.
I start by identifying the requirements and creating test cases.
I perform functional testing to ensure the app meets the requirements.
I test the usability of the app by checking the user interface and user experience.
I perform performance testing to check the app's speed, stability, and scalability.
I test the security of t...
- Q11. What is xpath can you find webelement by using it ?
- Ans.
XPath is a language used to locate elements in an XML document. Yes, we can find web elements using XPath.
XPath is used to navigate through elements and attributes in an XML document
It can also be used to locate elements in HTML documents
XPath expressions can be used with Selenium WebDriver to locate web elements
Example: driver.findElement(By.xpath("//input[@id='username']"));
- Q12. How you perform cross browser testing in your company ?
- Ans.
We use a combination of manual and automated testing to perform cross browser testing.
We identify the most commonly used browsers by our users and test on those first.
We use automated testing tools like Selenium to test on multiple browsers simultaneously.
We also perform manual testing on each browser to ensure compatibility.
We document any issues found and prioritize them based on severity.
We regularly update our test...
- Q13. Which defect tracking tools you used? Tell me different parameters of defect reporting?
- Ans.
I have used JIRA and Bugzilla for defect tracking. Parameters include severity, priority, steps to reproduce, and expected vs actual results.
Defect tracking tools used: JIRA and Bugzilla
Parameters of defect reporting: severity, priority, steps to reproduce, expected vs actual results
Severity: impact of the defect on the system
Priority: importance of fixing the defect
Steps to reproduce: detailed instructions on how to r...
- Q14. What is Upgradation testing ?
- Ans.
Upgradation testing is the process of testing an upgraded version of software or hardware to ensure its compatibility and functionality.
It involves testing the upgraded version of software or hardware
The purpose is to ensure compatibility and functionality
It includes testing for data migration, backward compatibility, and performance
Examples include upgrading an operating system, upgrading a database management system,...
- Q15. Challanges you faced during testing and how you overcome it ?
- Ans.
As a tester, I faced challenges in identifying and reproducing defects. I overcame it by improving my communication and collaboration skills with the development team.
Identifying and reproducing defects was a challenge
Improved communication and collaboration with the development team
Used tools like JIRA and Trello to track defects and progress
Developed a better understanding of the product and its features
Created detai...
- Q16. What is your current sprint duration ?
- Ans.
Our current sprint duration is 2 weeks.
Our team follows the Agile methodology and we have adopted a 2-week sprint cycle.
We have found that this duration allows us to deliver high-quality software within a reasonable timeframe.
During each sprint, we focus on completing a set of user stories and addressing any bugs or issues that arise.
At the end of each sprint, we conduct a retrospective to identify areas for improvemen...
- Q17. Who priorities sprint itams in your company?
- Ans.
The product owner and the development team collectively prioritize sprint items in our company.
The product owner is responsible for understanding the business requirements and customer needs.
The development team provides input on the technical feasibility and effort required for each item.
Collaborative discussions and negotiations take place to determine the priority of sprint items.
Factors like customer value, busines...
- Q18. How you perform API testing in your company?
- Ans.
API testing is performed using a combination of manual and automated testing techniques.
We use tools like Postman and SoapUI for API testing
We create test cases based on API documentation and requirements
We test for functionality, performance, security, and error handling
We use mock servers to simulate API responses
We perform both positive and negative testing
We use automation scripts to perform regression testing
We co...
- Q19. Scenario based question
Interview Preparation Tips
- Manual Testing
- Selenium
- API Testing
- SQL
- Core Java
- Non functional testing
Advice is your concepts should be clear and you should be confidant on your answers while in interview.
Key point : your attitude matters alot.😊
Best luck for the interview 👍
Skills evaluated in this interview
Anonymous
I applied via Job Portal and was interviewed in Nov 2024. There were 2 interview rounds.
(3 Questions)
- Q1. Explain singleton design pattern.
- Ans.
The singleton design pattern ensures a class has only one instance and provides a global point of access to it.
Restricts instantiation of a class to a single object.
Provides a global access point to that instance.
Commonly used for configuration settings, logging, and thread pools.
Example in Java: Use a private constructor and a static method to get the instance.
Thread-safe implementations can be achieved using synchron...
- Q2. Streaming query to get frequently occurring character.
- Ans.
Use Java Streams to count character occurrences in a string and find the most frequent one efficiently.
Utilize Java Streams to process the string: `string.chars()` converts to an IntStream.
Group characters using `Collectors.groupingBy()` to count occurrences.
Sort the map by values to find the maximum occurrence: `map.entrySet().stream().max(Map.Entry.comparingByValue())`.
Example: For input 'hello', the output should be...
- Q3. SQL query for outer join scenario
- Ans.
An outer join retrieves records from both tables, including unmatched rows from one or both sides.
Outer joins can be LEFT, RIGHT, or FULL, depending on which table's unmatched rows you want to include.
Example of LEFT JOIN: SELECT * FROM A LEFT JOIN B ON A.id = B.a_id; // Includes all from A and matched from B.
Example of RIGHT JOIN: SELECT * FROM A RIGHT JOIN B ON A.id = B.a_id; // Includes all from B and matched from A...
(2 Questions)
- Q1. Questions related to Jwt token
- Q2. Questions related to current project architecture
Skills evaluated in this interview
3 questions
1. Check the given string is reversed?
input: "worldhello" output: "true"
2. Check the given string is permutation of palindrome?
3. Sort a stack using an empty stack
(2 Questions)
- Q1. Javascript basics
- Q2. Nodejs basics questions
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
(2 Questions)
- Q1. How do GO handle concurrency?
- Ans.
GO uses goroutines and channels to handle concurrency efficiently.
GO uses goroutines to achieve concurrency. Goroutines are lightweight threads managed by the Go runtime.
Channels are used to communicate between goroutines. They provide a safe way to pass data between concurrent processes.
GO also has a built-in 'sync' package for synchronization primitives like mutexes and wait groups.
GO's 'select' statement allows for ...
- Q2. What is defer in GO ? If there are multiple defers in a function, what will be order of execution of these?
- Ans.
defer in Go is used to delay the execution of a function until the surrounding function returns.
Defer is used to ensure that a function call is performed at the end of the surrounding function, regardless of where the defer statement is located.
If there are multiple defers in a function, they will be executed in Last In, First Out (LIFO) order.
Example: func exampleFunc() { defer fmt.Println('First defer'); defer fmt.Pr...
Nishant Rai
(3 Questions)
- Q1. Memory leak in Android?
- Ans.
Memory leak in Android refers to a situation where an application uses memory inefficiently, causing unused memory to accumulate and not be released.
Memory leaks can occur when objects are not properly released after use, leading to a buildup of unused memory.
Common causes of memory leaks in Android include holding onto references to objects that are no longer needed, using static variables in a way that prevents them ...
- Q2. Garbage collection basics.
- Q3. Pass data between fragments in Android
- Ans.
Use ViewModel to share data between fragments in Android
Create a ViewModel class to hold the data to be shared
Observe the ViewModel in each fragment to receive updates
Use LiveData to ensure data is updated in real-time
(2 Questions)
- Q1. Implement a Hash Map
- Ans.
A Hash Map is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
Use an array to store the key-value pairs
Implement a hash function to map keys to indices in the array
Handle collisions by using techniques like chaining or open addressing
- Q2. Activity lifecycle in Android
- Ans.
Activity lifecycle in Android refers to the different states an activity goes through during its lifetime.
There are several states in the activity lifecycle, including onCreate, onStart, onResume, onPause, onStop, and onDestroy.
Activities can transition between these states based on user interactions or system events.
Understanding the activity lifecycle is crucial for managing resources and maintaining a smooth user ex...
Interview Preparation Tips
Skills evaluated in this interview
binsy badarudeen
(5 Questions)
- Q1. Why stream api in Java?
- Ans.
Stream API in Java provides a functional approach to processing collections of objects.
Allows for concise and readable code by using functional programming concepts like map, filter, and reduce.
Enables parallel processing of data, improving performance for large datasets.
Supports lazy evaluation, allowing for efficient use of resources.
Example: List<String> names = Arrays.asList("Alice", "Bob", "Charlie"); names....
- Q2. Java code to filter even numbers from a list and store the square of those in another list
- Ans.
Java code to filter even numbers from a list and store the square of those in another list
Create two ArrayLists to store the original list and the squared even numbers list
Iterate through the original list and check if each number is even
If the number is even, square it and add it to the squared even numbers list
- Q3. Java code to check two strings are anagram
- Ans.
Java code to check if two strings are anagrams
Create a function that takes in two strings as parameters
Convert both strings to char arrays and sort them
Compare the sorted char arrays to check if they are equal
- Q4. Need of functional interfaces in java
- Ans.
Functional interfaces in Java are needed to enable the use of lambda expressions, which provide a concise way to implement single abstract method interfaces.
Functional interfaces have exactly one abstract method and can have multiple default or static methods.
They are used to enable the use of lambda expressions, which provide a concise way to implement the single abstract method.
Examples of functional interfaces in Ja...
- Q5. How threads can be created in java
- Ans.
Threads in Java can be created by extending the Thread class or implementing the Runnable interface.
Extend the Thread class and override the run() method
Implement the Runnable interface and implement the run() method
Use the Executor framework for managing threads
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
(2 Questions)
- Q1. Japanese introduction
- Q2. Job related questions
Interview Preparation Tips
Mohanapriya R
Coding round first round
(2 Questions)
- Q1. String concepts
- Q2. Array methods in js
- Ans.
Array methods in JavaScript are built-in functions that allow manipulation and traversal of arrays.
Some common array methods include: map(), filter(), reduce(), forEach(), and find().
map() - creates a new array by applying a function to each element in the original array.
filter() - creates a new array with elements that pass a certain condition.
reduce() - applies a function against an accumulator and each element in th...
Skills evaluated in this interview
Swap number, sql queries
(1 Question)
- Q1. Multiple interviewers multiplication questions
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.
(2 Questions)
- Q1. Day to day activities
- Ans.
Daily tasks for an Azure DevOps Engineer include managing CI/CD pipelines, collaborating with teams, and monitoring system performance.
Manage and optimize CI/CD pipelines using Azure Pipelines to automate build and deployment processes.
Collaborate with development and operations teams to ensure smooth integration and delivery of applications.
Monitor application performance and system health using Azure Monitor and Appl...
- Q2. Questions based on azure in day to day activities
I applied via Campus Placement and was interviewed in Jan 2024. There were 4 interview rounds.
Global warming at morning 9:00 with 10 people
There are lot question in aptitude
(3 Questions)
- Q1. About my final year project
- Q2. About myself and something related to my degree
- Q3. Some case study
(2 Questions)
- Q1. About myself and my family background
- Q2. About final year project
Interview Preparation Tips
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