What happens if a non-existent initialization parameter is requested in a servlet?
- The servlet will automatically create the parameter with a default value.
- The servlet will prompt the user to provide the missing parameter.
- The servlet will receive a null value for the requested parameter.
- The servlet will throw a runtime exception.
If a servlet requests a non-existent initialization parameter, it will receive a null value for the requested parameter. Servlets should handle null values appropriately to avoid unexpected behavior.
In servlets, which method is used to add a cookie to the response headers?
- response.addCookie(Cookie cookie);
- response.createCookie(Cookie cookie);
- response.insertCookie(Cookie cookie);
- response.setCookie(Cookie cookie);
The correct method to add a cookie to the response headers in servlets is response.addCookie(Cookie cookie);.
What is a key difference between automated testing and manual testing?
- Automated testing is faster
- Automated testing requires human intervention
- Manual testing cannot be repeated easily
- Manual testing is more reliable
The key difference is that automated testing is performed with the help of test scripts and tools, while manual testing relies on human testers. Automated testing is efficient but requires setup and maintenance, while manual testing is more adaptable but slower.
How does the choice of Software Architecture Design impact the scalability of a software application?
- It determines the color scheme.
- It doesn't affect scalability.
- It enables the use of new technologies.
- It plays a crucial role in scalability.
Software architecture design significantly impacts scalability. It determines the structure of the software, affecting its ability to handle increased loads and users. A well-designed architecture can support scaling, whereas a poor one may lead to performance issues. Architects make choices related to components, patterns, and technologies to ensure scalability.
How does the use of design principles, such as SOLID, impact the maintainability of software?
- It enhances software maintainability.
- It has no impact on software maintainability.
- It makes software rigid and hard to change.
- It only affects performance.
The use of design principles, such as SOLID (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion), enhances software maintainability by promoting modular, flexible, and easy-to-maintain code.
In a scenario where a software product is expected to have frequent updates and feature additions, how can Software Architecture Design ensure smooth transitions and minimal disruptions?
- By using outdated technologies and platforms
- Ignoring software updates altogether
- Through monolithic architecture
- With microservices and modular design
Software Architecture Design can ensure smooth transitions and minimal disruptions by adopting a modular and microservices-based architecture. This allows for independent development and deployment of components, facilitating updates without affecting the entire system.
Why is code review considered an essential step in the software development process?
- It ensures software security.
- It helps catch defects early
- It improves hardware performance
- It speeds up development.
Code review is an essential step in the software development process because it helps catch defects and issues early in the development cycle, leading to higher-quality software. It also promotes knowledge sharing and collaboration among team members.
You are reviewing a piece of code and notice that it is difficult to understand due to a lack of comments and inconsistent naming conventions. Which coding best practice is being violated?
- DRY (Don't Repeat Yourself)
- KISS (Keep It Simple, Stupid)
- SOLID Principles
- Self-Documenting Code
In this case, the best practice being violated is "Self-Documenting Code." Code should be written in a way that is clear and understandable without extensive comments, and it should adhere to consistent naming conventions. Self-documenting code improves code readability and maintainability.
The __________ method is used to read initialization parameters from ServletConfig.
- getConfig()
- getInitParameter()
- getParameters()
- initParams()
The getInitParameter() method is used to read initialization parameters from ServletConfig.
In a servlet, how can you retrieve parameters sent via the POST method?
- request.getParameter()
- request.getParameters()
- request.getPostParameters()
- request.retrievePostParams()
Parameters sent via the POST method in a servlet can be retrieved using the request.getParameter() method.
In a servlet, how can you determine if a request parameter has multiple values?
- request.getMultipleValues(parameterName)
- request.getParameterValues(parameterName)
- request.hasMultipleValues(parameterName)
- request.isMultiValued(parameterName)
To determine if a request parameter has multiple values, you can use request.getParameterValues(parameterName), which returns an array of values associated with the given parameter name.
A servlet receives form data with both text and file inputs. Identify the correct approach to parse this data.
- Convert the data to JSON and parse it
- Parse the data manually using String methods
- Use a library like Apache Commons FileUpload
- Use the built-in Java Scanner class
The correct approach is to use a library like Apache Commons FileUpload, which is designed to handle form data with both text and file inputs efficiently and reliably.