NICE Interview Questions, Process, and Tips

Q1. Performance testing process
Ans. 
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...read more
Answered by AI
Add your answer

Q1. Performance testing life cycle
Add your answer

Q1. What is the performance testing life cycle and how is it managed?
Ans. 
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...read more
Answered by AI
Add your answer

Nice and nice and nice and nice and nice and nice and nice and nice and nice and

Q1. Nice and nice and nice and nice
Add your answer
Q2. Rjd ke liye message Kiya tha na
Add your answer

Aptitude test and attribute of the day of the day of the day of

There is aptitude+DBMS+OS+coding online test round

Q1. OOP-Polymorphism
Add your answer
Q2. DSA-Mirror image of binary tree
Ans. 
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.
Answered by AI
Add your answer
Q3. SQL query related to joins
Add your answer
Q4. Discussion on projects and internship experience
Add your answer

Q1. 1-Java Questions- this, super keyword, Difference between Abstract class and interfece
Add your answer
Q2. 2-Asked OOPs concepts, asked questions on method overloading and overrding
Add your answer
Q3. 3-Java program to reverse string, check palindrome
Ans. 
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.
Answered by AI
Add your answer
Q4. 4- Selenium questions- list vs set, findelement vs findelements, Actions class, write syntax for actions class, implict wait and explict wait
Ans. 
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...read more
Answered by AI
Add your answer
Q5. 5- Questions on mostly used git commands, what is CICD
Add your answer
Q6. 6-API testing various response codes
Ans. 
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
Answered by AI
Add your answer
Q7. 7- Manual testing questions- what is regression testing, difference between regression and restesting Difference between intergration and system testing
Add your answer
Q8. 8- agile process, what is user story, what is sprint
Ans. 
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...read more
Answered by AI
Add your answer

1st round had aptitude , OS , and software development cycle qns , and then 2 coding questions easy and medium level

Q1. DSA- oops questions were asked
Add your answer
Q2. SQl queries were asked
Add your answer

Q1. Authorisation and authentication difference
Ans. 
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
Answered by AI
Add your answer

Q1. Explain Feature selection Techniques
Ans. 
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...read more
Answered by AI
Add your answer
Q2. Difference between Covariance and Correlation
Ans. 
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...read more
Answered by AI
Add your answer