ValueLabs Senior Technical Lead Interview Questions and Answers

Check if a string is a palindrome

• Iterate through the string from both ends and compare characters

• Ignore spaces and punctuation while checking for palindrome

• Convert string to lowercase for case-insensitive comparison

Ppk and Cpk are process capability indices used in Six Sigma to measure the ability of a process to produce output within specification limits.

• Ppk and Cpk are statistical measurements that assess how well a process is performing in relation to its specification limits.

• Ppk measures the potential capability of a process to produce output within specification limits, while Cpk measures the actual capability of a process t...read more

Different types of risks include financial, operational, strategic, compliance, and reputational risks.

• Financial risk: related to the potential loss of financial resources, such as market risk, credit risk, and liquidity risk.

• Operational risk: arises from internal processes, systems, or people, leading to errors, fraud, or disruptions.

• Strategic risk: involves the impact of business decisions on the organization's long-...read more

Probability plot curves denote the distribution of data points compared to a theoretical distribution.

• Probability plot curves help visualize how well a dataset fits a particular distribution.

• The curves can indicate if the data is normally distributed or follows a different distribution.

• Examples of probability plots include Q-Q plots and P-P plots.

Functional requirements specify what the system should do, while non-functional requirements specify how the system should perform.

• Functional requirements describe the specific behavior or functions of the system.

• Non-functional requirements describe the quality attributes of the system such as performance, security, and usability.

• Functional requirements are typically documented in use cases or user stories.

• Non-function...read more

Microservices are a software development technique where an application is composed of small, independent services that communicate over well-defined APIs.

• Microservices are small, independent services that work together to form an application

• Each microservice is responsible for a specific function or feature

• Microservices communicate with each other over well-defined APIs

• Microservices can be developed, deployed, and sca...read more

Repository design pattern is a structural design pattern that separates the data access logic from the business logic in an application.

• It provides a way to access data from a data source without exposing the underlying data access code to the business logic.

• It helps in achieving separation of concerns by keeping data access code in a separate layer.

• Commonly used in applications where data needs to be accessed from mul

Design a weather app using Android architecture components.

• Use MVVM architecture pattern for separation of concerns

• Implement LiveData for real-time data updates

• Utilize Room database for offline data storage

• Integrate Retrofit for network calls to fetch weather data

• Use ViewModel to manage UI-related data in a lifecycle-conscious way