Answer the following statements true (T) or false (F)
1. Concrete classes provide implementations for at least one of the methods and properties they define.
2. You may define implementations for abstract methods to act as a default.
3. All methods in an abstract class are abstract.
4. The MustOverride keyword has the same effect as the Overridable keyword.
5. Objects of abstract base classes can be instantiated.
1. False. Concrete classes provide implementations for every method and property they
define.
2. False. Attempting to provide an implementation for an abstract method is a syntax
error.
3. False. An abstract class may contain instance data and non-abstract methods.
4. False. A MustOverride method has no implementation and must be overridden while an Overridable method provides an implementation and the option of being overridden in derived classes.
5. False. Only concrete classes can instantiate objects.
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The move_uploaded_file() function is used to move an uploaded file from its ____________________ location to the permanent destination.
Fill in the blank(s) with the appropriate word(s).
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You are implementing a URL whitelisting system for a company that wants to restrict outbound HTTP'S connections to specific domains from their EC2-hosted applications you deploy a single EC2 instance running proxy software and configure It to accept traffic from all subnets and EC2 instances in the VPC. You configure the proxy to only pass through traffic to domains that you define in its whitelist configuration You have a nightly maintenance window or 10 minutes where ail instances fetch new software updates. Each update Is about 200MB In size and there are 500 instances In the VPC that routinely fetch updates. After a few days you notice that some machines are failing to successfully download some, but not all of their updates within the maintenance window. The download URLs used for
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