Permissions in Computer System? Here is the complete guide for beginners

 

 

Permissions in Computer system - a deep and practical guide for beginners

Permissions are the backbone of the computer system. They decide who is allowed to access specific resources, perform actions and etc.

In this blog, we are going to learn about the concept of permission in details, including their types and importance in system security.

Permissions are basically implement on operating system. To understand this concept better, you can read our detailed guide on Operating System (Windows, Linux, macOS).  Click Here to Learn. 

What are permissions?

So basically permissions are a set of rules, rights and regulations that define that what action and process are going to perform in a computer system. In short it’s mean to giving permission to user, app or system to perform any kind of task.

In permission, the thing which is decided is:

•        Which resources user can access
•        How much control a user gets over those resources
•       Which data or resources user use

Purpose of permission is to make the computer system secure, stop unauthorized access and maintain the confidentiality, integrity and availability of data.

Permission basically implement in multiple things like operating system, data bases, mobile applications and MIS etc.

Why permissions are important

The main objective of permission is to secure the system, controlled each and every access and proper use of resources.it is important for maintain security, protection of data and ensure only authorized users can get access.it also helps organizations to protect sensitive organizational data, Prevent unauthorized access and Maintain system stability.

Permissions are important because:

•         No one can access confidential data
•         Modify/ delete important files
•         No one can misuse or hacked system resources

It also support CIA triad:

•      Confidentiality: Only authorized and trusted users can view data
•        Integrity: Only permitted users can modify data
•         Availability: Resources remain accessible to valid users

Types of permissions

User permission

In user permission, defines what kind of task a user allows to perform in a computer system. Permission are assigned to user based of several things like job role, responsibilities and organizational hierarchy.

For example:

In an organization

•         User 1 gets Read-only access
•         User 2 gets Read and update access
•         User 3 gets Full system control

User gets some common permissions like Installing or uninstalling software, Creating or deleting user accounts, access of file folder and log in to system.

File & folder permission

In file and folders permissions, it can be decided who can read, write or execute files which stored in a computer system.

File & Folder permissions are typically connected with how data is organized inside the computer system’s storage hierarchy. Learn more detail about File system structure in Operating Systems.

Basic file & folder permissions are:

•        Read (R) – User can only open and view the file & folder
•        Write (W) – User can only modify or delete the file & folder
•        Execute (X) – User can run the file or folder as a program

In Linux operating system, file permissions are structured according to the computer system internal design and architecture. For better understanding, explore our article Linux Architecture 

App permission

Applications require permissions to access different system resources.  These permissions involve camera, microphone, location, contacts, storage etc.

If an application requests unnecessary permissions, it can be Privacy violation, Security threat, and Malware risk.

System permission

These are high level permissions, what admin can do?

•         Install or update the operating system install on computer
•         Install or remove any kind of software
•         Create, modify, or delete user accounts easily
•         Change security and system settings

On the other hand Normal users do not have administrative permissions to prevent system damage or perform any task which is related to admin.

Interview questions to remember

Define permissions in an information system?

Answer:

Permissions are a set of rules, rights and regulations that define that what action and process are going to perform in a computer system.

Why are permissions important in computer system?

Answer:

Permissions are important because:

•        No one can access confidential data
•        Modify/ delete important files
•        No one can misuse or hacked system resources

Define the basic file permissions?

Answer:

The Basic file & folder permissions are:

•        Read (R) – User can only open and view the file & folder
•        Write (W) – User can only modify or delete the file & folder
•        Execute (X) – User can run the file or folder as a program

Do u know about the Principle of Least Privilege?

Answer:

In Principle of Least Privilege states that a user should be given only the minimum level of access required to perform their job and task.

What problems can occur due to incorrect permissions in computer system?

Answer:

Incorrect permissions can cause multiple problems which effects computer system, includes Data leakage , Accidental file deletion, Malware spread, System instability ,Legal issues and many more, that’s why proper permission is require for any kind of task.

How do admin manage permissions in an organization?

Answer:

Administrators manage permissions by proper management like:

• Creating user accounts
• Assigning roles and tasks
• Setting file and folder access rights to user
• Monitoring access logs regularly
• Regularly reviewing and updating permissions

They ensure users only access resources necessary for their work.

Define the administrative permissions?

Answer:

Administrative permissions provide full control over the computer system. An admin can install software’s, changes system settings, manage users, configure security policies etc.

Explain about application permissions?

Answer:

Application permissions basically allow applications to access system resources like Camera, Microphone, Storage, Location etc.

Tell something about permission auditing?

Answer:

Permission auditing typically involves monitoring and reviewing access logs to track which user use what data.

How can you handle a situation where an employee has excessive permissions?

Answer:

I can handle this situation by:

1.  Review their role and job requirements clearly

2.  Apply the Principles of Least Privilege

3.  Remove unnecessary permissions if not require

4.  Document the changes

5.  Monitor system logs regularly for any unusual activity

Conclusion

We can say permissions are the core part of Information technology and management information system. They control the limit of each user, system reliability, protects sensitive data, ensure systems run smoothly. The permission management is essential for organizational security, efficiency, and system stability. Understand the concept of permission is important for every IT student, as it is the foundation of system security and access control.

Do You know Permissions also control how background processes and services access computer system resources. To understand this concept, read our topic of Process Vs Services Explained.