Topic 2.4: Working With Java Data Types - Explain an Object's Lifecycle (creation, "dereference by reassignment" and garbage collection)

Question 1

How does “dereference by reassignment” benefit memory management?

Answer 1

“Dereference by reassignment” ensures efficient resource utilization by promptly releasing memory resources, preventing memory leaks, and optimizing resource usage.

Question 2

What is the impact of “dereference by reassignment” on garbage collection?

Answer 2

By reducing the number of reachable objects, “dereference by reassignment” improves the efficiency of garbage collection by limiting the objects that need to be processed and collected.

Question 3

This is the process of automatically reclaiming memory occupied by objects that are no longer reachable or referenced by the program.

Answer 3

What is
garbage collection
in the object’s lifecycle?

Question 4

Why is
garbage collection
important in Java?

Answer 4

This is important as it helps in memory management by identifying and releasing memory occupied by objects that are no longer accessible, preventing memory leaks.

Question 5

What is
garbage collection
in the object’s lifecycle?

Answer 5

This is the process of automatically reclaiming memory occupied by objects that are no longer reachable or referenced by the program.

Question 6

What is the role of
garbage collection
in Java?

Answer 6

This in Java automatically manages memory by reclaiming memory occupied by unreachable objects, preventing memory leaks and ensuring efficient memory usage.

Question 7

This is important as it helps in memory management by identifying and releasing memory occupied by objects that are no longer accessible, preventing memory leaks.

Answer 7

Why is
garbage collection
important in Java?

Question 8

What is
“dereference by reassignment”
in the context of an object’s lifecycle?

Answer 8

This refers to removing a reference to an object by assigning a different value or null to the reference variable.

Question 9

What are the implications of “dereference by reassignment” on object reachability?

Answer 9

“Dereference by reassignment” indicates that the object is no longer needed and can be considered unreachable, making it eligible for garbage collection.

Question 10

What are the phases involved in the garbage collection process?

Answer 10

The garbage collection process includes marking, sweeping, and optional compacting.

Marking identifies reachable objects, sweeping collects garbage objects, and compacting reduces memory fragmentation.

Question 11

During this stage, you can access and modify an object’s fields, invoke its methods, and interact with it in the program.

Answer 11

What happens during the
usage stage
of an object’s lifecycle?

Question 12

During this stage, an object is allocated memory and its fields are initialized with default values.

Answer 12

Describe the
creation stage
of an object’s lifecycle?

Question 13

This in Java automatically manages memory by reclaiming memory occupied by unreachable objects, preventing memory leaks and ensuring efficient memory usage.

Answer 13

What is the role of
garbage collection
in Java?

Question 14

This refers to removing a reference to an object by assigning a different value or null to the reference variable.

Answer 14

What is
“dereference by reassignment”
in the context of an object’s lifecycle?

Question 15

Describe the
creation stage
of an object’s lifecycle?

Answer 15

During this stage, an object is allocated memory and its fields are initialized with default values.

Question 16

What happens during the
usage stage
of an object’s lifecycle?

Answer 16

During this stage, you can access and modify an object’s fields, invoke its methods, and interact with it in the program.