10+ Endurance Technologies Interview Questions and Answers

The digin pattern implemented for string pool is a technique to reuse string objects to optimize memory usage.

• String pool is a cache of string objects stored in memory.

• When a string is created, it is first checked if it already exists in the pool.

• If it does, a reference to the existing string object is returned instead of creating a new one.

• This helps in reducing memory consumption and improving performance.

• Examples: String s1 = "Hello"; String s2 = "Hello"; Here, s1 and s2 w...read more

Check if a number is even or odd without using mod operator.

• Use bitwise AND operator with 1 to check the last bit of the number.

• If the last bit is 0, the number is even. If it's 1, the number is odd.

• Example: (num & 1) == 0 for even, (num & 1) == 1 for odd.

Hashcode and equals method are related to object comparison in Java.

• Hashcode is used to identify the object and equals method is used to compare two objects.

• If two objects are equal, their hashcode values must be the same.

• If two objects have the same hashcode value, it doesn't necessarily mean that they are equal.

• It is recommended to override both hashcode and equals method when creating custom classes.

HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.

• HashMap uses hashing to store and retrieve elements

• It uses an array of linked lists to handle collisions

• The hash function is used to map the key to an index in the array

• The internal implementation includes methods like put(), get(), and resize()

Program to find distinct characters in a given string sentence

• Create a set to store unique characters

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

• Return the set of distinct characters

Java 8 introduced several new features including lambda expressions, streams, and default methods.

• Lambda expressions for functional programming

• Streams for processing large data sets

• Default methods for backward compatibility

• Date and Time API improvements

• Nashorn JavaScript engine

• Parallel array sorting

• Type annotations

• Repeatable annotations

• Optional class for null checks

• Base64 encoding and decoding

• PermGen space replaced with Metaspace

• Improved security with TLS 1.2 enabled by defau...read more

Clients opt for automation testing to save time and cost. My role in regression testing is to ensure that the software still works after changes.

• Automation testing saves time and cost by reducing manual effort

• Regression testing ensures that the software still works after changes

• My role in regression testing is to create and execute automated test cases

• I also analyze test results and report defects to the development team

Security to microservices can be achieved through various measures.

• Implementing authentication and authorization mechanisms

• Using SSL/TLS for secure communication

• Implementing rate limiting and throttling to prevent DDoS attacks

• Implementing input validation and output encoding to prevent injection attacks

• Implementing logging and monitoring to detect and respond to security incidents

• Using containerization and orchestration tools like Kubernetes to manage and secure microservices...read more

Apigee gateway is a platform for managing and securing APIs.

• It acts as a mediator between the client and the backend services.

• It provides features like authentication, rate limiting, caching, and analytics.

• It can be deployed on-premises or in the cloud.

• It supports various protocols like REST, SOAP, and GraphQL.

• It helps in API versioning and documentation.

Microservices can be deployed on cloud platforms, containers, or on-premise servers.

• Cloud platforms like AWS, Azure, and Google Cloud provide managed services for deploying microservices.

• Containers like Docker and Kubernetes can be used to deploy and manage microservices.

• On-premise servers can also be used to deploy microservices, but require more maintenance and management.

• The choice of deployment platform depends on factors like scalability, security, and cost.

• For example, ...read more

Proxies can be created using various programming languages and frameworks.

• In Java, proxies can be created using the java.lang.reflect.Proxy class.

• In Python, proxies can be created using the built-in library 'socketserver'.

• In Node.js, proxies can be created using the 'http-proxy' module.

• Proxies can be used for load balancing, caching, security, and more.

Converting requirements to test cases involves analyzing requirements, identifying test scenarios, and creating test cases.

• Analyze requirements to understand the functionality

• Identify test scenarios based on requirements

• Create test cases for each scenario

• Ensure test cases cover all possible scenarios

• Review and refine test cases as needed

STLC is a process of testing software while SDLC is a process of developing software.

• STLC stands for Software Testing Life Cycle

• It involves planning, designing, executing and reporting of tests

• SDLC stands for Software Development Life Cycle

• It involves planning, designing, developing, testing and maintaining software

• STLC is a subset of SDLC

• STLC ensures that the software meets the specified requirements and is of high quality

Defect life cycle is the process of identifying, reporting, prioritizing, fixing, and verifying defects in software.

• Defect is identified by testers during testing

• Defect is reported to development team

• Development team prioritizes and fixes the defect

• Fixed defect is verified by testers

• If defect is not fixed, it goes back to development team

• If defect is fixed, it is closed

We use a variety of test management tools depending on the project requirements.

• For agile projects, we use JIRA for test case management and execution.

• For performance testing, we use LoadRunner and JMeter.

• For automation testing, we use Selenium and Appium.

• For defect tracking, we use Bugzilla and HP ALM.

• We also use custom-built tools for specific project needs.

The complete lifecycle of testing involves planning, designing, executing, and reporting.

• Planning: Define test objectives, scope, and strategy.

• Designing: Create test cases and test data.

• Executing: Run tests and record results.

• Reporting: Analyze results and report defects.

• Retesting: Verify fixes and retest defects.

• Regression testing: Ensure changes do not impact existing functionality.