Right Answer: Requirements Traceability is the process of tracking and linking requirements throughout the project lifecycle to ensure that all requirements are met in the final product. The purpose of it is to ensure that all requirements are accounted for, validated, and tested, helping to manage changes and ensure quality.
Types of traceability matrices include:
1. **Forward Traceability**: Tracks requirements to their corresponding design, implementation, and testing artifacts.
2. **Backward Traceability**: Ensures that each test case can be traced back to the original requirement.
3. **Bi-directional Traceability**: Combines both forward and backward traceability to ensure comprehensive coverage and validation of requirements.
Right Answer: Sterilization is the process of completely eliminating all forms of microbial life, including bacteria, viruses, and spores. Sanitation, on the other hand, reduces the number of microorganisms to a safe level, but does not eliminate them entirely.
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: Performance tuning in ABAP involves optimizing the code and database access to enhance the efficiency and speed of ABAP programs. To improve performance, you can:
1. Use efficient SQL queries (e.g., SELECT only necessary fields).
2. Minimize database accesses (e.g., use internal tables).
3. Avoid nested loops and use hash tables for faster lookups.
4. Utilize buffering for frequently accessed data.
5. Optimize the use of SELECT statements with proper WHERE conditions.
6. Use appropriate data types and structures.
7. Analyze and optimize the runtime using transaction ST05 (SQL Trace) and ST12 (Performance Analysis).
8. Implement parallel processing where applicable.
Right Answer: Compiled languages are converted into machine code by a compiler before execution, resulting in faster performance. Interpreted languages are executed line-by-line by an interpreter at runtime, which can lead to slower performance.
Right Answer: To ensure reusability and modularity in Ab Initio graphs, you can use the following practices:
1. **Create reusable components**: Design reusable graphs and components (like subgraphs and reusable transformations) that can be called from multiple graphs.
2. **Use parameter files**: Implement parameter files to manage configurations and settings, allowing the same graph to be used in different contexts.
3. **Modular design**: Break down complex graphs into smaller, manageable subgraphs that focus on specific tasks, promoting clarity and reusability.
4. **Standardize naming conventions**: Use consistent naming conventions for graphs, components, and parameters to make them easily identifiable and reusable.
5. **Documentation**: Maintain clear documentation for each graph and component, explaining its purpose and how to use it, which aids in reusability.
Right Answer: PDL (Parameter Definition Language) in Ab Initio is used to define and manage parameters for graphs and components, allowing for dynamic configuration and customization of data processing jobs. It enables the specification of values that can be easily changed without modifying the underlying code.
Right Answer: `var` is function-scoped or globally-scoped and can be re-declared and updated. `let` is block-scoped, can be updated but not re-declared in the same scope. `const` is also block-scoped, cannot be updated or re-declared, and must be initialized at the time of declaration.
Right Answer: Cookies are small pieces of data stored on the user's computer by the web browser while browsing a website, used for tracking and remembering information about the user. Sessions are temporary storage on the server that keeps track of user data across multiple requests during a single visit, typically expiring when the user closes the browser. Local storage is a web storage feature that allows websites to store data in the user's browser persistently, even after the browser is closed, with no expiration time.
Right Answer: AJAX (Asynchronous JavaScript and XML) is a web development technique that allows web pages to communicate with a server and update content asynchronously without reloading the entire page. It works by using JavaScript to send requests to the server, which can return data (often in JSON or XML format) that the browser can then use to update the webpage dynamically.
Right Answer: In CSS, a class is defined with a dot (.) and can be applied to multiple elements, while an ID is defined with a hash (#) and should be unique to a single element on a page.
Right Answer: Flexbox, or the Flexible Box Layout, is a CSS layout model that allows items in a container to be arranged and aligned efficiently. It works by defining a container as a flex container using `display: flex;`, which enables its direct children (flex items) to be laid out along a main axis (horizontal or vertical). You can control the alignment, direction, spacing, and size of these items using properties like `flex-direction`, `justify-content`, `align-items`, and `flex-wrap`. This makes it easier to create responsive layouts without using floats or positioning.
