For each CRX node in the hierarchy, which actions can be configured using the user admin interface?

The structure section of an editable template has a locked component.
What happens to the content of that component when a developer unlocks it?

A developer is working on a project locally and needs to install packages manually. The deployments to the localhost must be automated to speed up development. This functionality must be toggled on and off, depending on the needs of the developer.
Which step should the developer take to achieve this?

A developer creates two custom classes. ClassA has the following code:
package com.aem.abc;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ClassA {
private static final Logger logger = LoggerFactory.getLogger(this.getClass()); public void classAMethod() { logger.debug("Message from Class A method");
}
}
The developer creates a custom log custom.log with debug level in OSGi sling log support for the Java package com.aem.abc. The developer adds another class ClassB with the following code:
package com.aem.xyz;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ClassB {
private static final Logger logger = LoggerFactory.getLogger(this.getClass()); public void classBMethod() { logger.debug("Message from Class B method");
}
}
Which action must the developer take to see the log messages in the same file from both classes?

A developer is working with the following HTL expression in a component rendering script:
${'path/page.infinity.json' @extension = 'html',
removeSelectors = ['foo'],
selectors = ['foo', 'bar'],
prependSuffix = 'hello',
suffix = 'world' }
What is the expected output of this expression?