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Samsung Performance Test Engineer Interview Questions, Process, and Tips
Samsung Performance Test Engineer Interview Experiences
1 interview found
Anonymous
I applied via Approached by Company and was interviewed in Jun 2022. There were 2 interview rounds.
(9 Questions)
- Q1. What are the cases in which you analyze the thread dump?
- Ans.
Thread dumps are analyzed to identify performance bottlenecks and deadlocks in the application.
To identify the root cause of performance issues
To identify deadlocks and thread contention issues
To identify long running threads and blocked threads
To identify memory leaks and excessive CPU usage
To identify issues related to garbage collection
To identify issues related to database connections and transactions
- Q2. List some scenarios where you observe issues with the heap dump and provide recommendations to the dev team. Follow-up questions will be asked based on your answer to the previous questions.
- Ans.
Scenarios where issues with heap dump occur and recommendations for dev team
Heap dump size is too large
Heap dump is not generated at the right time
Heap dump is not analyzed properly
Heap dump is not shared with the right team members
Recommendations: Optimize code to reduce memory usage, generate heap dump at appropriate times, analyze heap dump thoroughly, share heap dump with relevant team members
- Q3. How to generate heap dump and thread dump for Unix and Linux systems?
- Ans.
Generating heap dump and thread dump on Unix/Linux systems
For heap dump: use jmap command with -dump option
For thread dump: use jstack command
Heap dump can also be generated using kill -3
Thread dump can also be generated using kill -QUIT
- Q4. What are the various thread states found in the thread dump?
- Ans.
Thread states in thread dump include NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING, and TERMINATED.
NEW: thread has been created but not yet started
RUNNABLE: thread is executing or ready to execute
BLOCKED: thread is blocked waiting for a monitor lock
WAITING: thread is waiting indefinitely for another thread to perform a particular action
TIMED_WAITING: thread is waiting for another thread to perform a particular action ...
- Q5. What is context switching, and parsing in the database, and how does it impact the performance of the DB server?
- Ans.
Context switching and parsing are database operations that impact DB server performance.
Context switching is the process of switching between different tasks or threads in a CPU.
Parsing is the process of analyzing and interpreting data in a database.
Both operations require CPU resources and can cause delays in processing other tasks.
Context switching can be reduced by optimizing code and minimizing the number of thread...
- Q6. What tools did you use for DB server tuning?
- Ans.
I have used various tools for DB server tuning such as SQL Profiler, SQL Server Management Studio, and Database Engine Tuning Advisor.
SQL Profiler for monitoring and analyzing SQL Server activity
SQL Server Management Studio for managing and configuring SQL Server instances
Database Engine Tuning Advisor for analyzing workload and recommending index and partitioning strategies
- Q7. How do you gather NFR from the client if an application is totally new and the client is not aware of the performance testing?
- Ans.
To gather NFR from an unaware client for a new application, follow these steps:
Explain the importance of performance testing and its benefits
Provide examples of how performance issues can impact the application and business
Ask the client about their expectations for the application's performance
Discuss the application's usage scenarios and expected user load
Collaborate with the development team to identify potential pe...
- Q8. Can you reinitialize the virtual users if they directly go to the error state and it has consumable data?
- Ans.
Yes, virtual users can be reinitialized if they go to error state with consumable data.
Reinitializing virtual users can help in identifying the root cause of the error.
It is important to ensure that the consumable data is backed up before reinitializing the virtual users.
Reinitializing virtual users should be done only after analyzing the error and identifying the cause.
It is important to have a backup plan in case rei...
- Q9. Difference between monolithic and microservices architecture.
- Ans.
Monolithic architecture is a single, self-contained unit while microservices architecture is a collection of small, independent services.
Monolithic architecture is tightly coupled and difficult to scale.
Microservices architecture is loosely coupled and can be scaled independently.
Monolithic architecture has a single point of failure while microservices architecture is resilient to failures.
Monolithic architecture is ea...
Write Beanshell code to extract the dynamic value from the JSON response. Write BeanShell script to save the orderID from the response to an external CSV file.
Interview Preparation Tips
Skills evaluated in this interview
Interview questions from similar companies
Interview Questionnaire
8 Questions
- Q1. What is SDLC
- Ans.
SDLC stands for Software Development Life Cycle.
It is a process followed by software development teams to design, develop, test, and deploy software.
It includes phases like planning, analysis, design, implementation, testing, and maintenance.
It helps in ensuring that the software is developed efficiently and meets the requirements of the stakeholders.
It is a framework that helps in managing the software development pro...
- Q2. What is STLC
- Ans.
STLC stands for Software Testing Life Cycle, which is a process followed to ensure software quality.
STLC involves planning, designing, executing, and reporting of tests.
It includes various phases such as requirement analysis, test planning, test design, test execution, and test closure.
STLC helps in identifying defects early in the development cycle, reducing the cost of fixing them later.
It ensures that the software m...
- Q3. What is android testing
- Ans.
Android testing is the process of testing applications developed for the Android operating system.
It involves testing the functionality, performance, and usability of Android apps.
Testing can be done manually or using automated tools like Espresso, UI Automator, and Robolectric.
Types of testing include unit testing, integration testing, and acceptance testing.
Common testing challenges include device fragmentation, comp
- Q4. What is localization test
- Ans.
Localization testing is the process of verifying that a product or service is adapted to meet the language, cultural, and other requirements of a specific country or region.
Localization testing ensures that the product or service meets the linguistic and cultural requirements of a specific region.
It involves testing the product or service for language translation, date and time formats, currency, and other regional set...
- Q5. What is bug life cycle
- Ans.
Bug life cycle is the process of identifying, reporting, fixing, and verifying software defects.
Bug is identified by tester
Bug is reported to development team
Development team fixes the bug
Bug fix is verified by tester
Bug is closed if verified or reopened if not fixed
- Q6. Which is latest version you used in you mobile
- Ans.
I am currently using the latest version of iOS on my iPhone, which is iOS 14.5.
iOS 14.5 is the latest version of the operating system for iPhones
Regular updates are important for security and performance improvements
- Q7. What is difference between bug and error
- Ans.
Bug is a coding mistake while error is a deviation from expected behavior.
Bug is a mistake in the code that causes unexpected behavior.
Error is a deviation from expected behavior.
Bug is a result of a mistake made by a programmer.
Error can be caused by a variety of factors such as hardware failure, network issues, or user input.
Bug can be fixed by modifying the code while error requires identifying and resolving the und
- Q8. How to upload and capture bug
- Ans.
To upload and capture a bug, use a bug tracking tool and follow a standardized process.
Use a bug tracking tool like JIRA or Bugzilla to log the bug
Provide detailed steps to reproduce the bug
Include screenshots or videos to help explain the issue
Assign the bug to the appropriate team member for resolution
Follow up on the bug until it is resolved and closed
Skills evaluated in this interview
(2 Questions)
- Q1. Performance Testing Life Cycle
- Q2. Basics of Performance Testing Concepts - challenges with scripting, etc
(2 Questions)
- Q1. Explain about project Architecture Overview
- Q2. Assessing the Scope for performance testing and Test Plan
(2 Questions)
- Q1. Why do you want to change
- Q2. Attitude and your Salary Expectations
Interview Preparation Tips
(2 Questions)
- Q1. What are performance threads.
- Ans.
Performance threads are concurrent virtual users that simulate real-world user behavior.
Performance threads are used in load testing to simulate multiple users accessing a system simultaneously.
Each thread represents a virtual user and performs a specific set of actions on the system.
Threads can be configured with different parameters such as ramp-up time, duration, and number of iterations.
Performance threads can help...
- Q2. CPU controlling limits
- Ans.
CPU controlling limits refer to the maximum amount of CPU resources that can be allocated to a process or application.
CPU controlling limits are important for ensuring that a single process or application does not consume all available CPU resources, which can lead to system instability and poor performance.
These limits can be set at the operating system level or within specific applications.
Examples of CPU controlling...
Interview Preparation Tips
Skills evaluated in this interview
Interview Questionnaire
8 Questions
- Q1. What is SDLC
- Ans.
SDLC stands for Software Development Life Cycle.
It is a process followed by software development teams to design, develop, test, and deploy software.
It includes phases like planning, analysis, design, implementation, testing, and maintenance.
It helps in ensuring that the software is developed efficiently and meets the requirements of the stakeholders.
It is a framework that helps in managing the software development pro...
- Q2. What is STLC
- Ans.
STLC stands for Software Testing Life Cycle, which is a process followed to ensure software quality.
STLC involves planning, designing, executing, and reporting of tests.
It includes various phases such as requirement analysis, test planning, test design, test execution, and test closure.
STLC helps in identifying defects early in the development cycle, reducing the cost of fixing them later.
It ensures that the software m...
- Q3. What is android testing
- Ans.
Android testing is the process of testing applications developed for the Android operating system.
It involves testing the functionality, performance, and usability of Android apps.
Testing can be done manually or using automated tools like Espresso, UI Automator, and Robolectric.
Types of testing include unit testing, integration testing, and acceptance testing.
Common testing challenges include device fragmentation, comp
- Q4. What is localization test
- Ans.
Localization testing is the process of verifying that a product or service is adapted to meet the language, cultural, and other requirements of a specific country or region.
Localization testing ensures that the product or service meets the linguistic and cultural requirements of a specific region.
It involves testing the product or service for language translation, date and time formats, currency, and other regional set...
- Q5. What is bug life cycle
- Ans.
Bug life cycle is the process of identifying, reporting, fixing, and verifying software defects.
Bug is identified by tester
Bug is reported to development team
Development team fixes the bug
Bug fix is verified by tester
Bug is closed if verified or reopened if not fixed
- Q6. Which is latest version you used in you mobile
- Ans.
I am currently using the latest version of iOS on my iPhone, which is iOS 14.5.
iOS 14.5 is the latest version of the operating system for iPhones
Regular updates are important for security and performance improvements
- Q7. What is difference between bug and error
- Ans.
Bug is a coding mistake while error is a deviation from expected behavior.
Bug is a mistake in the code that causes unexpected behavior.
Error is a deviation from expected behavior.
Bug is a result of a mistake made by a programmer.
Error can be caused by a variety of factors such as hardware failure, network issues, or user input.
Bug can be fixed by modifying the code while error requires identifying and resolving the und
- Q8. How to upload and capture bug
- Ans.
To upload and capture a bug, use a bug tracking tool and follow a standardized process.
Use a bug tracking tool like JIRA or Bugzilla to log the bug
Provide detailed steps to reproduce the bug
Include screenshots or videos to help explain the issue
Assign the bug to the appropriate team member for resolution
Follow up on the bug until it is resolved and closed
Skills evaluated in this interview
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