Schlussprüfung — Fachinformatiker Anwendungsentwicklung (English)

• A) Long planning phases before actual development
• B) Iterative and incremental approach with short feedback loops
• C) No consideration of changes during development
• D) Strict separation between development and operations

Correct Answer: B. Agile methods are characterized by short development cycles and continuous adaptation to changing requirements, while the waterfall model is sequential and less flexible.

• A) Conception and programming of software solutions
• B) System administration and network operations
• C) Quality assurance of developed applications
• D) Requirements analysis and creation of user stories

Correct Answer: B. While Application Development IT Specialists develop software, system administration is typically the task of System Integration IT Specialists or IT Administrators.

• A) Maximum separation between development and operations
• B) Reduction of the number of deployments per year
• C) Unification of software development and IT operations through automation
• D) Increasing documentation requirements in the development process

Correct Answer: C. DevOps aims to integrate development and operations through automation and continuous processes to improve collaboration and accelerate delivery.

• A) Maximum comp

• A) Iterative development with short cycles
• B) Linear, sequential approach with clearly defined phases
• C) Flexible adjustment of requirements during the project
• D) Visualization of the workflow

Correct Answer: B. The Waterfall model is characterized by its linear, sequential approach with clearly defined phases, while agile methods are iterative and flexible.

• A) Product Backlog
• B) Sprint Backlog
• C) Project Plan
• D) Product Increment

Correct Answer: C. The Project Plan is not an official Scrum artifact. Instead, Product Backlog, Sprint Backlog, and Product Increment are used as artifacts.

• A) Fixed sprint lengths of 2-4 weeks
• B) Limitation of work in progress
• C) Obligation to daily stand-up meetings
• D) Predefined roles like Product Owner

Correct Answer: B. Limiting work in progress (WIP) is a core principle of Kanban, while fixed sprint lengths and daily stand-ups are typical for Scrum.

• A) Strict adherence to initial plans
• B) Sequential execution of phases
• C) Emphasis on documentation and formal processes
• D) Flexibility and adaptability to change

Correct Answer: D. The main difference is that agile methods emphasize flexibility and adaptability to change, while traditional approaches focus on strict planning and sequential execution.

• A) The statement of work is more detailed than the specification
• B) The statement of work is created by the client, the specification by the contractor
• C) The specification contains only non-functional requirements
• D) The statement of work serves for internal planning, the specification for client communication

Correct Answer: B. The statement of work describes requirements from the client's perspective and is created by the client, while the specification represents the technical implementation by the contractor. Option A is incorrect because the specification is more detailed. Option C is incorrect because both also contain functional requirements. Option D is incorrect because the statement of work serves for client communication.

• A) Should-have
• B) Could-have
• C) Won't-have
• D) Must-have

Correct Answer: D. Must-have requirements are essential for basic functionality. Should-have requirements are important but not critical. Could-have requirements are useful but optional. Won't-have requirements will not be implemented in this version.

• A) Representation of data flows between systems
• B) Encapsulation of data and functionality in object-oriented models
• C) Modeling of temporal sequences and workflows
• D) Visualization of database structures

Correct Answer: B. Classes encapsulate data (attributes) and functionality (methods), while data flows are represented in activity diagrams and temporal sequences in sequence diagrams.

• A) Inheritance
• B) Composition
• C) Generalization
• D) Realization

Correct Answer: B. Composition represents a strong "has-a" relationship where the part cannot exist without the whole, while inheritance and generalization represent "is-a" relationships.

• A) Sequence diagrams show static structures, activity diagrams show dynamic flows
• B) Sequence diagrams focus on temporal sequence of messages, activity diagrams on process flows
• C) Sequence diagrams are only used for technical systems, activity diagrams for business processes
• D) Sequence diagrams represent object interactions, activity diagrams represent state changes

Correct Answer: B. Sequence diagrams focus on the temporal sequence of messages between objects, while activity diagrams model process flows and business workflows.

• A) Exactly one relationship
• B) Zero or one relationship
• C) One or more relationships
• D) Many relationships (more than 10)

Correct Answer: C. The notation "1..*" indicates a minimum of one and a maximum of many (unlimited) relationships, meaning "one or more".

• A) To maximize the speed of database queries
• B) To reduce redundancies in the database and ensure data integrity
• C) To minimize the storage requirements of a database
• D) To reduce the complexity of SQL queries

Correct Answer: B. Normal forms reduce redundancies and ensure data integrity, not primarily speed or storage space.

• A) An attribute that uniquely identifies a record
• B) An attribute that references the primary key of another table
• C) An attribute that must be not null and unique
• D) An attribute that serves to improve query speed

Correct Answer: B. A foreign key references the primary key of another table and serves to establish relationships.

• A) All attributes must be dependent on all other attributes
• B) All attributes must be atomic and contain no repeating groups
• C) All non-key attributes must be dependent on the entire primary key
• D) There must be no transitive dependencies

Correct Answer: B. 1NF requires atomic attributes and the absence of repeating groups in tables.

• A) When the database is fully normalized and no redundancies remain
• B) When query performance is affected by too many JOINs
• C) When the database has not achieved the third normal form
• D) When the database contains no foreign keys

Correct Answer: B. Denormalization can be useful when performance suffers from too many JOINs, although it introduces redundancies.

• A) Maximum code reusability through inheritance
• B) Hiding internal implementation details and protecting data
• C) Facilitating communication between different objects
• D) Reducing the number of classes in a system

Correct Answer: B. Encapsulation hides internal states and makes them accessible only through defined interfaces, while A and C rather relate to other OOP concepts and D is not the main goal.

• A) Open/Closed Principle
• B) Interface Segregation Principle
• C) Single Responsibility Principle
• D) Liskov Substitution Principle

Correct Answer: C. The Single Responsibility Principle states that a class should have only a single responsibility, while A relates to extensibility, B to specific interfaces, and D to substitutability of objects.

• A) The ability of a class to inherit from another class
• B) The ability of objects to change during runtime
• C) The ability to have methods with the same name but different implementations
• D) The ability to bundle data and methods in a class

Correct Answer: C. Polymorphism allows objects of different classes to be treated as objects of a common superclass, with methods being implemented differently depending on the specific object type.

• A) The exact time in milliseconds that an algorithm requires
• B) The upper bound for the growth of resource requirements in relation to input size
• C) The minimum memory size that an algorithm requires
• D) The average number of CPU cycles per input element

Correct Answer: B. Big-O notation describes asymptotic behavior and provides an upper bound for resource requirements, not exact values or minimal requirements.

• A) Merge Sort
• B) Quick Sort
• C) Insertion Sort
• D) Heap Sort

Correct Answer: C. Insertion Sort has a worst-case complexity of O(n²), while Merge Sort and Heap Sort have O(n log n), and Quick Sort has O(n²) in the worst case but O(n log n) on average.

• A) Singly linked list
• B) Array
• C) Binary search tree
• D) Hash table

Correct Answer: C. A binary search tree enables search operations with O(log n) time complexity, while arrays and lists require O(n), and hash tables have O(1) on average but O(n) in the worst case.

• A) Bubb

• A) Git Flow
• B) Trunk-Based Development
• C) Feature Branching
• D) Release Branching

Correct Answer: B. Trunk-Based Development focuses on short lifecycles and frequent merges, while Git Flow envisions longer lifecycles with specialized branch types.

• A) Rebase preserves the complete history of all commits
• B) Rebase creates a linear history without merge commits
• C) Rebase automatically resolves all merge conflicts
• D) Rebase only works with local repositories

Correct Answer: B. Rebase rewrites commits and creates a linear history, while Merge preserves commits from both branches and creates merge commits.

• A) Trunk-Based Development
• B) Git Flow
• C) Forking Workflow
• D) Branch-per-Feature

Correct Answer: B. Git Flow specifies that hotfixes are derived directly from the main branch, while other models do not prescribe this.

• A) Automated testing of code changes
• B) Mechanism for code review and integration
• C) Resolving merge conflicts
• D) Creating new branches

Correct Answer: B. Pull Requests primarily serve for code review and controlled integration of changes, while other functions require separate tools or Git commands.

• A) Each layer can communicate with every other layer
• B) The application is divided into horizontal layers with defined interfaces
• C) There are only three layers: frontend, backend, and database
• D) Layers can be dynamically added at runtime

Correct Answer: B. Layered architecture divides the application into horizontal layers with defined interfaces, while the other options contain false or incomplete descriptions.

• A) MVVM has no Controller component
• B) MVVM introduces a ViewModel to prepare data for the View and decouple Model and View
• C) MVC is only used for web applications, while MVVM is for desktop applications
• D) MVVM does not support data binding

Correct Answer: B. MVVM introduces a ViewModel that prepares data for the View and decouples communication between Model and View, which is the main difference from MVC.

• A) It allows for unlimited scalability
• B) It isolates the core application from technical details through ports and adapters
• C) It eliminates the need for testing
• D) It reduces the amount of code needed by 50%

Correct Answer: B. Hexagonal architecture isolates the core application from technical details through ports and adapters, which enables high testability and flexibility.

• A) For all objects that need to be accessible from anywhere in the application
• B) For objects that represent global configuration or resources that must be unique
• C) For all database connection objects
• D) For all UI components

Correct Answer: B. The Singleton pattern should be used for objects that represent global configuration or resources that must be unique, not for all objects that need to be accessible everywhere.

• A) The higher up in the pyramid, the more tests should be performed.
• B) The base of the pyramid consists of many fast unit tests, while the peak contains few slow E2E tests.
• C) All tests should be evenly distributed across all levels of the pyramid.
• D) The test pyramid states that integration tests are more important than unit tests.

Correct Answer: B. The test pyramid models that many fast, isolated unit tests form the base, while few comprehensive E2E tests form the peak. Option A is incorrect because more tests are needed in the base. Option C ignores the different speeds and scopes of the test types. Option D is incorrect because both test types are important, but serve different purposes.

• A) It speeds up test execution by replacing real dependencies.
• B) It allows testing of components that depend on external resources without actually having to call them.
• C) It automatically increases code coverage.
• D) It completely eliminates the need for integration tests.

Correct Answer: B. Mocking allows isolated testing of components that depend on external resources without actually having to call them. Option A is partially correct, but not the main advantage. Option C is incorrect as mocking does not automatically increase coverage. Option D is incorrect as mocking does not eliminate the need for integration tests.

• A) Stateless
• B) Cacheable
• C) Stateful
• D) Uniform Interface

Correct Answer: C. Stateful is in contrast to Stateless a principle that REST deliberately avoids to increase scalability.

• A) OAuth 2.0 is for authentication, OpenID Connect for authorization
• B) OpenID Connect builds on OAuth 2.0 and adds an identity layer
• C) OAuth 2.0 always requires JWTs, OpenID Connect does not
• D) OpenID Connect is only suitable for mobile applications

Correct Answer: B. OpenID Connect is an extension of OAuth 2.0 specifically developed for user authentication, while OAuth 2.0 is primarily for authorization.

• A) 200 OK
• B) 201 Created
• C) 204 No Content
• D) 304 Not Modified

Correct Answer: C. The 204 No Content status code indicates that the server successfully processed the request and is not returning any content.

• A) <div>
• B) <nav>
• C) <menu>
• D) <navbar>

Correct Answer: B. The <nav> tag is specifically intended for navigation elements, while <div> is generic, <menu> is obsolete, and <navbar> is not a valid HTML tag.

• A) align-items
• B) justify-content
• C) flex-direction
• D) flex-wrap

Correct Answer: A. align-items controls the vertical alignment of flex items, while justify-content controls horizontal alignment, flex-direction determines the axis orientation, and flex-wrap regulates element wrapping.

• A) Establish database connections
• B) Dynamically change the structure and content of a web page
• C) Predefine CSS styles
• D) Perform server-side operations

Correct Answer: B. DOM manipulation enables dynamic changes to a web page's content and structure, while the other options cover different task areas.

• A) .catch()
• B) .then()
• C) .finally()
• D) .error()

Correct Answer: A. .catch() is used to handle errors in a Promise chain, while .then() serves for successful resolutions, .finally() always executes, and .error() is not a valid method.

• A) Monoliths always use SQL databases, microservices use NoSQL
• B) In a microservices architecture, services are independently deployable and scalable
• C) Monoliths are always slower than microservices
• D) Microservices always require more developers than monoliths

Correct Answer: B. The independence of services is a core characteristic of microservices. A is incorrect because both architectures can use different types of databases. C is incorrect because performance depends on implementation. D is incorrect because team size is not directly dependent on architecture.

• A) It centrally stores data for all microservices
• B) It manages permissions for each microservice individually
• C) It is a central entry point for client requests and forwards them
• D) It optimizes database queries for all microservices

Correct Answer: C. The API gateway acts as a single entry point and manages requests. A is incorrect because it doesn't store data. B is incorrect because it centrally manages permissions. D is incorrect because it doesn't optimize database queries.

• A) It monitors system performance and alerts on issues
• B) It enables microservices to dynamically discover addresses of other services
• C) It provides load balancing across all services
• D) It manages the deployment lifecycle of services

Correct Answer: B. Service discovery allows services to find each other without hardcoded addresses. A is incorrect as that's monitoring. C is incorrect as that's load balancing. D is incorrect as that's deployment management.

• A) Reduction of the number of developers in the team
• B) Automation of build, test, and deployment processes
• C) Increase in code complexity
• D) Reduction of documentation requirements

Correct Answer: B. CI/CD pipelines automate build, test, and deployment processes, which accelerates and stabilizes development. Option A is incorrect as the number of developers is not reduced. Option C is incorrect as code complexity is not increased. Option D is incorrect as documentation requirements are not reduced.

• A) A container orchestration system
• B) The smallest deployable unit in Kubernetes
• C) A storage object for persistent data
• D) A network plugin for Kubernetes

Correct Answer: B. A Pod is the smallest deployable unit in Kubernetes, which includes one or more containers with shared network and storage. Option A is incorrect as Kubernetes is the container orchestration system. Option C is incorrect as PersistentVolume and other objects are used for persistent data. Option D is incorrect as network plugins are provided by other components.

• A) docker create -t my-app:latest
• B) docker run -t my-app:latest
• C) docker build -t my-app:latest
• D) docker deploy -t my-app:latest

Correct Answer: C. The command 'docker build -t my-app:latest' creates a Docker image from a Dockerfile. Option A is incorrect as 'docker create' creates a container, not an image. Option B is incorrect as 'docker run' starts a container, it does not create an image. Option D is incorrect as 'docker deploy' is not a valid Docker command.

• A) Code versioning and management
• B) Containerization of applications
• C) Automation of deployment, scaling, and management of containerized applications
• D) Creation of Docker images

Correct Answer: C. Kubernetes is an open-source system for automating the deployment, scaling, and management of containerized applications. Option A is incorrect as code versioning and management is handled by systems like Git. Option B is incorrect as containerization is handled by Docker. Option D is incorrect as Docker image creation is handled by Docker.

• A) Authentication checks permissions, authorization verifies identity
• B) Authentication verifies identity, authorization sets permissions
• C) Authentication always occurs before authorization
• D) Authorization is only relevant for administrators

Correct Answer: B. Authentication determines who the user is, while authorization determines what the user is allowed to do. Option A confuses the terms. Option C is often the case but not a defining difference. Option D is incorrect as authorization is relevant for all user roles.

• A) Storing email addresses for customer communication
• B) Collecting birth data only for age-restricted content
• C) Collecting browsing history for personalized advertising
• D) Logging login attempts for security

Correct Answer: C. Browsing history is not required for personalized advertising and exceeds the processing purpose. Options A and B are appropriate for the stated purpose. Option D serves the security purpose and is therefore justified.

• A) Regular password changes for database users
• B) Using prepared statements
• C) Restricting database user permissions
• D) Implementing a Web Application Firewall

Correct Answer: B. Prepared statements separate SQL code from data, effectively preventing SQL injection. Option A protects against password theft, not injection. Option C reduces risk but does not completely prevent it. Option D can block attacks but is not direct prevention in code.

• A) Cross-Site Scripting (XSS)
• B) SQL Injection
• C) Broken Authentication
• D) Insecure Direct Object References

Correct Answer: D. Insecure Direct Object References is a form of broken access control where attackers can manipulate references to objects to access unauthorized data. Option A is a separate category. Option B is injection-based. Option C is authentication-related.