Question 1

Briefly describe the ProtectionDomain class.

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Question 2

The ____ class is used for access control operations and decision making.
A) AccessController
B) SecurityManager
C) ClassLoader
D) java.security.Object

Accepted Answer

The AccessController class is responsible for enforcing access control decisions and policies, such as determining whether a certain action is allowed or not. It does this by executing code in a privileged context and using the security policy to make access control decisions. The SecurityManager class is also involved in access control, but its primary role is to enforce security policies and handle security-related operations such as checking whether a code source is trusted or not. The ClassLoader class is responsible for loading classes into the JVM, and the java.security.Object class is not a valid class in the Java programming language.

Question 3

What is the design goal of the Java language?

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Question 4

How does a concurrent low pause collector work?

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Question 5

____________________ is a memory-management activity carried out by the Java runtime environment to reclaim dynamically allocated memory that is no longer being used.

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Question 6

How does a serial collector work?

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Question 7

A(n) ____________________ serves as a group that contains objects that have the same accessibility and protection.

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Question 8

How does Java prevent invalid memory access?

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Question 9

____________________ builds an environment that provides separate name spaces for classes loaded from different locations.

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Question 10

Regarding protection domains, when an object from one domain calls code from another domain, the rule of ____ is employed.
A) uniqueness
B) complement
C) union
D) intersection

Accepted Answer

When an object from one protection domain calls code from another protection domain, the rule of intersection is employed. This means that the intersection of the two domains' permissions determines the access rights the calling object has to the called code. Only permissions that are present in both domains are allowed.

Question 11

What are the advantages and disadvantages of automatic garbage collection?

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Question 12

Regarding protection domains, how can objects in one domain automatically discover objects in another domain?

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Question 13

Describe the four-step Java byte code verification process.

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Question 14

A ____ object represents the policy for a Java application environment.
A) security
B) policy
C) permission
D) grant

Accepted Answer

A "policy" object in Java represents the policy for a Java application environment, specifying which permissions are available for code from various sources.

Question 15

The core of Java permissions is the ____ class.
A) java.security.Permission
B) ClassLoader
C) java.security.Policy
D) SecurityManager

Accepted Answer

The core of Java permissions is encapsulated by the java.security.Permission class, which represents access to a system resource.

Question 16

A ____ is a database of private keys and their associated digital certificates.
A) permission store
B) grant entry
C) keystore
D) policy rule

Accepted Answer

A keystore is a database that contains private keys and their associated digital certificates. This information is used by secure communication protocols such as SSL/TLS to establish a secure connection between two parties. The keystore can be thought of as a secure storage system for sensitive cryptographic material.

Question 17

All Java programs run on a common platform called the ____________________.

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Question 18

Individual permissions can be set using the ____ program without any programming.
A) policytool
B) securityManager
C) gc
D) policy

Accepted Answer

The policytool allows for the creation, editing, and management of the policy files used by the Java Security Manager, making it possible for individual permissions to be set without programming.

Question 19

Java ____________________ is the machine language of the JVM.

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Question 20

What are the attributes of a protection domain?

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Quiz 5: Java Programming Security