Find Interview Questions for Serko ltd.

Right Answer:
In AEM, user permissions and access control are implemented using the Apache Jackrabbit Oak security model. You can manage user permissions by creating user groups and assigning specific permissions to these groups through the AEM User Administration interface. Additionally, you can set access control lists (ACLs) on nodes in the JCR repository to define what users or groups can read, write, or modify content. This can be done using the AEM console or programmatically via the Sling API or JCR API.

Right Answer:
A Software Component (SWC) in AUTOSAR is a modular unit of software that encapsulates specific functionality and can communicate with other components through defined interfaces. It promotes reusability and separation of concerns in automotive software development.

Right Answer:
The ARM Compiler is specifically optimized for ARM architecture, providing better performance and code size for ARM-based applications, while GCC and Clang are general-purpose compilers that support multiple architectures. Additionally, the ARM Compiler includes proprietary features and optimizations tailored for ARM processors that may not be available in GCC or Clang.

Right Answer:
Internal tables in ABAP are data structures that hold multiple rows of data in memory, similar to arrays in other programming languages. They are used to store, manipulate, and process sets of data dynamically during program execution. Internal tables can be used for operations like reading, inserting, updating, and deleting data, and they can be defined with various types of keys and structures.

Right Answer:
Ab Initio handles parallelism through two main types:

1. **Data Parallelism**: This involves splitting data into smaller chunks that can be processed simultaneously across multiple nodes or processes. Each node works on a different subset of the data.

2. **Component Parallelism**: This allows multiple instances of a component to run in parallel, enabling different operations or transformations to occur at the same time within the same graph.

Both types enhance performance and efficiency in data processing.

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:
API documentation is a technical manual that explains how to use an API, including its endpoints, request and response formats, authentication methods, and examples. It is necessary because it helps developers understand how to integrate and interact with the API effectively, ensuring proper usage and reducing errors.

Right Answer:
RESTful principles include:

1. **Statelessness**: Each API call must contain all the information needed to understand and process the request, with no stored context on the server.
2. **Client-Server Architecture**: The client and server are separate, allowing for independent development and scalability.
3. **Uniform Interface**: A consistent way to interact with resources, typically using standard HTTP methods (GET, POST, PUT, DELETE).
4. **Resource-Based**: APIs should expose resources (data entities) through URIs, and clients interact with these resources.
5. **Representation**: Resources can be represented in various formats (like JSON or XML), and clients can request the format they prefer.
6. **Cacheability**: Responses should indicate whether they can be cached to improve performance and reduce server load.

These principles guide the design of APIs to be scalable, efficient, and easy to use.

Right Answer:
Synchronous API calls wait for the response before moving on to the next task, while asynchronous API calls allow the program to continue executing other tasks while waiting for the response.

Right Answer:
Webhooks are user-defined HTTP callbacks that are triggered by specific events in a web application, allowing real-time data transfer. They differ from APIs in that APIs require a request to be made to receive data, while webhooks automatically send data when an event occurs without needing a request.

Right Answer:
Data analysis is the process of inspecting, cleaning, and modeling data to discover useful information, draw conclusions, and support decision-making. It is important because it helps organizations make informed decisions, identify trends, improve efficiency, and solve problems based on data-driven insights.

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:
Clustering in data analysis is the process of grouping similar data points together based on their characteristics, without prior labels. It is an unsupervised learning technique. In contrast, classification involves assigning predefined labels to data points based on their features, using a supervised learning approach.

Right Answer:
Exploratory Data Analysis (EDA) is the process of analyzing and summarizing datasets to understand their main characteristics, often using visual methods. It helps identify patterns, trends, and anomalies in the data before applying formal modeling techniques.

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:
We prioritize features or tasks in an Agile sprint using a combination of factors like business value, risk, effort/size, dependencies, and urgency. Product Owner usually leads this, using techniques like MoSCoW (Must have, Should have, Could have, Won't have) or story pointing, to ensure the most valuable items are tackled first.

Right Answer:
Success in Agile is measured by:

* **Output:** Delivering valuable, working software frequently; achieving the product vision; meeting business goals; customer satisfaction; and predictability (consistent delivery).
* **Team Health:** Team morale; continuous improvement (velocity trends, retrospectives leading to action); collaboration; self-organization; and sustainable pace.

Right Answer:
A sprint backlog is a detailed plan of work for a specific sprint, derived from the product backlog. It's created during sprint planning by the development team, who select items from the product backlog they commit to complete, then break down those items into tasks and estimate the effort required for each.

Right Answer:
**Benefits:** Faster time to market, reduced risk, improved quality, faster feedback, happier teams.

**Challenges:** Requires high automation, strong collaboration, cultural shift, investment in infrastructure, and robust testing.

Right Answer:
Scrum is an Agile framework for managing and completing complex projects.

Implementation involves:

1. **Roles:** Defining roles like Product Owner, Scrum Master, and Development Team.
2. **Sprints:** Working in short, time-boxed iterations (Sprints), typically 2-4 weeks.
3. **Artifacts:** Using artifacts like Product Backlog, Sprint Backlog, and Increment.
4. **Events:** Conducting events such as Sprint Planning, Daily Scrum, Sprint Review, and Sprint Retrospective.
5. **Continuous Improvement:** Regularly inspecting and adapting the process based on feedback.