Find Interview Questions for Lob

Right Answer:
API testing is the process of verifying that an application programming interface (API) functions as expected, ensuring it meets the requirements for functionality, reliability, performance, and security. Tools that can be used for API testing include Postman, SoapUI, JMeter, RestAssured, and Swagger.

Right Answer:
Rate limiting in APIs is a technique used to control the number of requests a user can make to an API within a specific time period. It is implemented by setting thresholds (e.g., requests per minute) and using mechanisms like tokens, counters, or IP address tracking to monitor and restrict access when the limit is exceeded.

Right Answer:
API versioning is the practice of managing changes to an API by assigning version numbers to different iterations of the API. It is important because it allows developers to introduce new features or make changes without breaking existing client applications that rely on older versions, ensuring backward compatibility and a smoother transition for users.

Right Answer:
An API (Application Programming Interface) is a set of rules and protocols that allows different software applications to communicate with each other. It defines the methods and data formats that applications can use to request and exchange information. APIs work by sending requests from one application to another, which then processes the request and sends back a response.

Right Answer:
GET is used to retrieve data from a server, POST is used to send data to a server to create a resource, PUT is used to update an existing resource on the server, and DELETE is used to remove a resource from the server.

Right Answer:
I am [Your Name], and I have a background in [Your Field/Industry]. I have developed skills in [Key Skills Relevant to the Job, e.g., project management, software development, data analysis], and I am knowledgeable in [Relevant Technologies or Concepts]. I am passionate about [Your Interests Related to the Job] and continuously seek to improve my skills through [Learning Methods, e.g., courses, workshops, hands-on experience].

Right Answer:
Classification analysis is a data analysis technique used to categorize data into predefined classes or groups. It works by using algorithms to learn from a training dataset, where the outcomes are known, and then applying this learned model to classify new, unseen data based on its features. Common algorithms include decision trees, logistic regression, and support vector machines.

Right Answer:
The different types of data distributions include:

1. Normal Distribution
2. Binomial Distribution
3. Poisson Distribution
4. Uniform Distribution
5. Exponential Distribution
6. Log-Normal Distribution
7. Geometric Distribution
8. Beta Distribution
9. Chi-Squared Distribution
10. Student's t-Distribution

Right Answer:
A pivot table is a data processing tool that summarizes and analyzes data in a spreadsheet, like Excel. You use it by selecting your data range, then inserting a pivot table, and dragging fields into rows, columns, values, and filters to organize and summarize the data as needed.

Right Answer:
Correlation is a statistical measure that indicates the extent to which two variables fluctuate together, while causation implies that one variable directly affects or causes a change in another variable.

Right Answer:
The different types of data analysis are:

1. Descriptive Analysis
2. Diagnostic Analysis
3. Predictive Analysis
4. Prescriptive Analysis
5. Exploratory Analysis

Right Answer:
The third normal form (3NF) is a database normalization rule that requires a table to be in second normal form (2NF) and have no transitive dependencies. This means that all non-key attributes must depend only on the primary key and not on other non-key attributes.

Right Answer:
An artificial (derived) primary key is a unique identifier for a database record that is created by the database designer, rather than being derived from the data itself. It is typically a sequential number or a unique string that has no business meaning. It should be used when natural keys are not available, are too complex, or when there is a need for a stable identifier that won't change over time.

Right Answer:
CDC (Change Data Capture) technique is a method used to identify and capture changes made to data in a database, allowing for efficient data synchronization and updates in data warehousing.

A confirmed dimension is a dimension that is shared across multiple fact tables, ensuring consistency in reporting. For example, a "Customer" dimension can be confirmed across sales and returns fact tables.

A role-playing dimension is a dimension that can be used in multiple contexts within the same data model. For instance, a "Date" dimension can represent different roles like "Order Date," "Ship Date," and "Delivery Date."

Types of hierarchy include:
1. **Parent-Child Hierarchy**: A hierarchy where each member can have multiple children and a single parent.
2. **Level-Based Hierarchy**: A hierarchy where members are organized into levels, such as Year > Quarter > Month > Day.

Right Answer:
First Normal Form (1NF) is a property of a relation in a database that ensures all columns contain atomic, indivisible values, and each entry in a column is of the same data type. Additionally, each row must be unique, typically achieved by having a primary key.

Right Answer:
LIS stands for Laboratory Information System, which is a software system that manages and processes laboratory data, including test orders, results, and patient information.