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I applied via Approached by Company and was interviewed in Apr 2024. There was 1 interview round.
Java program to reverse string and check if it is a palindrome.
Create a function to reverse the input string.
Compare the reversed string with the original string to check if it is a palindrome.
Use built-in functions like StringBuilder or StringBuffer for string manipulation.
Handle cases where input is null or empty.
Selenium questions covering list vs set, findelement vs findelements, Actions class, implicit wait, and explicit wait.
List vs Set: List allows duplicate elements and maintains insertion order, while Set does not allow duplicates.
findElement vs findElements: findElement returns the first matching element, findElements returns a list of all matching elements.
Actions class: Used for performing complex user interactions li...
API testing involves checking various response codes to ensure the API functions correctly.
Test for common response codes like 200 (OK), 400 (Bad Request), 401 (Unauthorized), 404 (Not Found), 500 (Internal Server Error)
Verify the response code matches the expected result based on the API request
Use tools like Postman or RestAssured to automate API testing and check response codes
Check for edge cases where the API may
User story is a description of a feature from an end-user perspective, and sprint is a time-boxed iteration in Agile development.
User story is a short, simple description of a feature told from the perspective of the person who desires the new capability.
Sprint is a time-boxed iteration in Agile development, usually lasting 1-4 weeks, where a team works on a set of user stories.
User stories are written in a specific fo...
I applied via Company Website and was interviewed in Sep 2024. There were 2 interview rounds.
Testing Pyramid is a testing strategy that suggests the right balance of different types of automated tests.
The Testing Pyramid consists of three layers: Unit Tests, Service Tests, and UI Tests.
Unit Tests are at the bottom of the pyramid and focus on testing individual components or functions in isolation.
Service Tests are in the middle layer and focus on testing the interactions between different components or service...
Developers perform unit testing to ensure individual units of code are working correctly.
Developers are responsible for writing unit tests for their own code.
Unit testing is typically done using testing frameworks like JUnit, NUnit, or pytest.
Unit tests focus on testing small, isolated parts of the codebase, such as functions or methods.
Unit testing helps identify bugs early in the development process.
Automated unit te...
Automation code for handling multiple windows
Use getWindowHandles() method to get handles of all open windows
Switch between windows using switchTo().window() method
Perform actions on each window as needed
Convert string to array and extract vowels into a new array
Iterate through each character in the string
Check if the character is a vowel (a, e, i, o, u)
Add the vowel to a new array of strings
I applied via Campus Placement and was interviewed in Nov 2024. There were 2 interview rounds.
It was nice, it was nice, it was nice
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Performance testing process involves planning, designing, executing, and analyzing tests to evaluate the speed, stability, and scalability of a system.
1. Planning: Define objectives, metrics, and scenarios for testing.
2. Designing: Create test scripts, data sets, and environment configurations.
3. Executing: Run tests under various load conditions to simulate real-world usage.
4. Analyzing: Monitor system performance, id...
Performance testing life cycle involves planning, preparation, execution, analysis, and reporting.
1. Planning phase involves defining objectives, scope, resources, and timelines.
2. Preparation phase includes creating test scenarios, scripts, and environment setup.
3. Execution phase involves running tests, monitoring performance metrics, and collecting data.
4. Analysis phase includes identifying bottlenecks, performance...
NICE interview questions for popular designations
I was interviewed in Dec 2024.
Nice and nice and nice and nice and nice and nice and nice and nice and nice and
Aptitude test and attribute of the day of the day of the day of
Get interview-ready with Top NICE Interview Questions
There is aptitude+DBMS+OS+coding online test round
Mirror image of a binary tree involves swapping the left and right children of each node.
Start with the root node and recursively swap the left and right children of each node.
Repeat this process for all nodes in the binary tree.
The resulting tree will be the mirror image of the original binary tree.
I applied via Campus Placement and was interviewed in Aug 2024. There were 2 interview rounds.
1st round had aptitude , OS , and software development cycle qns , and then 2 coding questions easy and medium level
I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.
Authentication verifies the identity of a user, while authorization determines what actions they are allowed to perform.
Authentication confirms the user's identity through credentials like passwords or biometrics.
Authorization controls the access rights of authenticated users to specific resources or actions.
Example: Logging into a system with a username and password is authentication, while being able to view/edit cer
I applied via Referral and was interviewed in Aug 2024. There was 1 interview round.
Feature selection techniques are methods used to select the most relevant features for a predictive model.
Filter methods: Select features based on statistical measures like correlation, chi-squared, or mutual information.
Wrapper methods: Use a specific model to evaluate the importance of features by training and testing subsets of features.
Embedded methods: Features are selected as part of the model training process, l...
Covariance measures the relationship between two variables, while correlation measures the strength and direction of a relationship.
Covariance can be positive, negative, or zero, indicating the direction of the relationship.
Correlation is always between -1 and 1, with 1 indicating a perfect positive relationship, -1 indicating a perfect negative relationship, and 0 indicating no relationship.
Covariance is affected by t...
Use Select class in Selenium to handle dynamic dropdowns by locating the dropdown element and selecting options by visible text, value, or index.
Locate the dropdown element using findElement method
Create a Select object using the dropdown element
Select options by visible text, value, or index using selectByVisibleText, selectByValue, selectByIndex methods
I applied via Naukri.com and was interviewed in Apr 2024. There was 1 interview round.
BDD stands for Behavior Driven Development and TDD stands for Test Driven Development.
BDD focuses on the behavior of the system from the user's perspective.
TDD focuses on writing tests before writing the actual code.
BDD uses natural language to describe the behavior of the system.
TDD helps in ensuring that the code meets the requirements and is well-tested.
Both BDD and TDD help in improving the quality of the software
JUnit is a unit testing framework for Java, while Mockito is a mocking framework used for creating mock objects in unit tests.
JUnit is used for writing and running repeatable automated tests to ensure code behaves as expected.
Mockito is used to create mock objects to simulate the behavior of real objects in unit tests.
Both JUnit and Mockito are commonly used in test-driven development (TDD) to ensure code quality and r
Microservices architecture is an architectural style that structures an application as a collection of loosely coupled services.
Each service is self-contained and can be developed, deployed, and scaled independently.
Services communicate with each other over lightweight protocols like HTTP or messaging queues.
Microservices allow for flexibility, scalability, and easier maintenance compared to monolithic architectures.
Ex...
HashSet default size 16 for performance balance between memory usage and lookup time.
Default size 16 provides a good balance between memory usage and lookup time.
Choosing a power of 2 size helps in distributing elements evenly across buckets.
Resizing the HashSet is expensive, so starting with a larger size reduces the need for resizing.
Example: If the default size was too small, it would lead to more collisions and deg
ActiveMQ is Java-based messaging broker while RabbitMQ is a message broker that implements the Advanced Message Queuing Protocol (AMQP).
ActiveMQ is written in Java and supports multiple messaging protocols like OpenWire, STOMP, MQTT, and AMQP.
RabbitMQ is written in Erlang and specifically implements the AMQP protocol.
ActiveMQ is more feature-rich and has a larger user base, while RabbitMQ is known for its reliability a...
Azure DB offers various databases including SQL Database, Cosmos DB, MySQL, PostgreSQL, and MariaDB.
SQL Database
Cosmos DB
MySQL
PostgreSQL
MariaDB
HashSet is a collection of unique elements, while HashMap is a key-value pair collection.
HashSet does not allow duplicate elements, HashMap allows duplicate keys but not duplicate values.
HashSet uses Set interface, HashMap uses Map interface.
Example: HashSet
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
HashMap allows null keys and values, and...
The duration of NICE interview process can vary, but typically it takes about less than 2 weeks to complete.
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