The IPS policy for pre-R81 gateways is installed during the Anti-bot policy install. The Anti-bot policy install includes both Anti-bot and IPS protections for pre-R81 gateways, since they share the same inspection engine. For R81 and above gateways, the IPS policy is installed separately as part of the Threat Prevention policy install, which also includes Anti-virus and Threat Emulation protections. Reference: R81 Threat Prevention Administration Guide, page 15.

Explanation
The correct command to store the GAIA configuration in a file is save configuration <filename>1. This will create a file with the current system level configuration in the home directory of the current user1. The other commands are incorrect because they either do not exist or do not save the configuration to a file.
References: 1: Backing up Gaia system level
configuration(https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=

Explanation
VPN Link Selection is a feature that allows the Security Gateway to select the best link for each VPN tunnel based on the network topology and the Link Selection configuration1. When the primary VPN link goes down, the Firewall can update the Link Selection entries to start using a different link for the same tunnel, as long as the remote peer supports this feature and has multiple IP addresses configured2. This way, the VPN tunnel can be maintained without interruption or renegotiation. The other options are not correct because:

Firewall
A). The Firewall will not drop the packets, but will try to send them over another link if possible.

Firewall
C). The Firewall will not send out the packet on all interfaces, but will use the routing table to determine the best interface for each destination.

Firewall
D). The Firewall will not inform the client that the tunnel is down, but will try to keep the tunnel up by switching to another link.
References: IPSec VPN - Link Selection, Outgoing VPN Link Selection on a gateway with multiple external interfaces

Explanation
Check Point API is an interface that allows users to automate tasks and manage Check Point products using RESTful web service calls. Check Point API uses JSON format for requests and responses. To create a new host object with the name "My Host" and IP address of "192.168.0.10", users need to use the set host command with the name and ip-address parameters6. The command syntax is:
set host name "My Host" ip-address "192.168.0.10"
Therefore, the correct answer is A.
References: 6: Check Point API reference

Explanation
FWD is a process that runs on both Security Management Server and Security Gateway. On Security Management Server, FWD handles logging and communication with SmartConsole. On Security Gateway, FWD receives policy files from FWM (the policy compiler process on Security Management Server) and stores them in a temporary directory before installing them on the firewall kernel7. Therefore, FWD is responsible for receiving policy files from FWM on Security Gateway side. The correct answer is A.
References: 7: Check Point Processes and Daemons