_________ balancing is a technique used to route user requests for a specific session to the same server.
- Cluster
- Load
- Round Robin
- Session
Session balancing is a technique used to route user requests for a specific session to the same server, ensuring continuity for the user session.
How is a cookie sent from a client to the server in an HTTP request?
- As a URL parameter
- As a part of the request body
- As a part of the request headers
- As a separate HTTP request
Cookies are sent from a client to the server as a part of the request headers in an HTTP request.
Can servlet initialization parameters be changed at runtime?
- It depends on the servlet container
- No
- Only through a filter
- Yes
No, servlet initialization parameters cannot be changed at runtime. They are set during the servlet's initialization and remain constant throughout the servlet's lifecycle.
To retrieve all the parameter names sent in a request, you can use the __________ method of the HttpServletRequest object.
- getParameterNames()
- getParameterValues()
- getRequestParameters()
- retrieveParameters()
The getParameterNames() method of the HttpServletRequest object is used to retrieve all the parameter names sent in a request.
How can you retrieve a servlet's initialization parameters in the init method?
- getInitParameter()
- getParameters()
- getServletConfig()
- getServletContext()
In the init method, you can use getInitParameter() to retrieve a servlet's initialization parameters.
_________ tracking involves appending session ID information to every URL.
- Cookie
- Request
- Session
- URL
URL tracking involves appending session ID information to every URL. This method is used to manage sessions in servlets by including the session ID in the URL.
How does redirection differ from request dispatching in servlets?
- Redirection happens on the client side
- Redirection is done by forward()
- Request dispatching involves changing the URL on the client side
- Request dispatching is faster
Redirection in servlets is done using the sendRedirect() method, while request dispatching is done using the forward() method.
JSP is converted into a servlet for execution, which is known as ______.
- JSP compilation
- JSP execution
- JSP translation
- Servlet initialization
JSP is converted into a servlet during the JSP translation phase, making it ready for execution.
What is the primary application of Bayes' Theorem in statistics?
- To calculate the mean of a data set
- To calculate the standard deviation
- To determine if two events are independent
- To update prior beliefs given new data
Bayes' Theorem is primarily used to update prior beliefs given new data. It's a way to go from a prior probability to a posterior probability, which is a more accurate estimate because it incorporates new evidence.
What is the impact of PCA on the interpretability of the original features?
- It depends on the data
- It doesn't affect interpretability
- It enhances interpretability
- It reduces interpretability
PCA typically reduces the interpretability of the original features. This is because each principal component is a linear combination of all the original features, making it difficult to understand how individual features affect the outcome.
In the context of a scatter plot, what does a positive slope indicate?
- The correlation between the variables is weak
- The variables are negatively correlated
- The variables are positively correlated
- The variables are unrelated
A positive slope in a scatter plot suggests that the two variables are positively correlated. This means as one variable increases, the other variable also tends to increase.
What are the potential issues with the K-means clustering method?
- It cannot handle non-spherical clusters
- It does not work well with non-numeric data
- It is sensitive to outliers
- All the options
The K-means clustering method can have several issues: it doesn't work well with non-numeric data, it's sensitive to outliers (since outliers can significantly move the cluster centroids), and it has difficulty handling clusters that are non-spherical or have varying sizes and densities.