The two security policy features that provide the capability to permit access to an application but block its sub-applications are URL filtering and micro application detection. URL filtering allows you to create policies that permit or block access to certain websites or webpages based on URL patterns. Micro application detection is a more sophisticated approach that can identify and block specific applications, even if they are embedded within other applications or websites. According to the Juniper Networks Certified Internet Specialist (JNCIS-SEC) Study Guide [1], "micro application detection is the most accurate way to detect and control applications." Content filtering and APPID are more general approaches and are not as effective in providing the level of granularity needed to block sub-applications.

Explanation
The Junos IPS feature is a security service that is integrated on SRX Series devices, which are high-performance network security platforms that offer firewall, VPN, IPS, application security, and unified threat management capabilities. The Junos IPS feature uses various methods to detect and prevent intrusions, such as signature-based detection, protocol anomaly detection, behavioral anomaly detection, and custom signatures. Signature-based detection compares network traffic against predefined patterns of known attacks and blocks traffic when a match is found. Protocol anomaly detection monitors network traffic for deviations from the expected or normal behavior of common protocols, such as HTTP, FTP, SMTP, and DNS, and blocks traffic when an anomaly is detected. Behavioral anomaly detection monitors network traffic forchanges in the baseline behavior of hosts, networks, or applications, and blocks traffic when a significant deviation is detected. Custom signatures allow administrators to create their own patterns of attacks based on specific criteria, such as IP addresses, ports, protocols, or payload content, and block traffic when a match is found.
The Junos IPS feature does not use sandboxing to detect unknown attacks, as this is a function of the Juniper ATP Cloud service, which is a cloud-based service that provides advanced malware detection and prevention for the network. The Junos IPS feature is not a standalone platform, but rather a service that runs on SRX Series devices, which can be deployed as physical or virtual appliances. References:
[Juniper Security, Professional (JNCIP-SEC) Reference Materials] 1
[Juniper Security, Specialist (JNCIS-SEC) Reference Materials] 2
[Junos OS Security Configuration Guide] 3
[Junos OS Security Feature Guide] 4
[Junos OS Security Feature Support Reference] 5

A policy scheduler is a feature that allows a security policy to be activated or deactivated for a specified time period. You can define schedulers for a single or recurrent time slot within which a policy is active. Two statements that are correct about a policy scheduler are:
A policy scheduler can be defined using a daily schedule: You can configure a scheduler to be active every day for a certain time interval, such as from 8:00 AM to 5:00 PM. You can also exclude specific days from the daily schedule, such as weekends or holidays.
A policy scheduler determines the time frame that a security policy is actively evaluated: When you associate a scheduler with a security policy, the policy is only available for policy lookup during the time frame specified by the scheduler. When the scheduler is off, the policy is inactive and cannot be matched by any traffic.

B) Chassis cluster member devices synchronize configuration using the control link: This statement is correct because the control link is used for configuration synchronization among other functions.
C) A control link failure causes the secondary cluster node to be disabled: This statement is correct because a control link failure causes the secondary node to become ineligible for primary role and remain in secondary role until the control link is restored.
E) Heartbeat messages verify that the chassis cluster control link is working: This statement is correct because heartbeat messages are sent periodically over the control link to monitor its status.

Explanation
Adaptive Threat Profiling is a feature that allows SRX Series Firewalls to generate, propagate, and consume threat feeds based on their own advanced detection and policy-match events. This feature enables you to configure security or IDP policies that, when matched, inject the source IP address, destination IP address, source identity, or destination identity into a threat feed, which can be leveraged by other devices as a dynamic-address-group (DAG). With adaptive threat profiling, the Juniper ATP Cloud service acts as a feed-aggregator and consolidates feeds from SRX across your enterprise and shares the deduplicated results back to all SRX Series Firewalls in the realm at regular intervals. SRX Series Firewalls can then use these feeds to perform further actions against the traffic. This feature allows you to find systems running applications that increase the risks on your network and ensure these systems are processed through IPS and Juniper ATP Cloud for malware and virus protection1. References:
Adaptive Threat Profiling Overview and Configuration
Adaptive Threat Profiling Overview
Juniper Launches Adaptive Threat Profiling, New VPN Features
Juniper Networks Answers Who and What is On the Network with Risk-Based Access Control Capabilities and New VPN Application Adaptive Threat Profiling Overview | SD Cloud