What is the main goal of security in an operating system?
A Data Encryption
B User Management
C Prevent Unauthorized Access
D Resource Allocation
The primary goal of security in an operating system is to protect the system from unauthorized access, ensuring that only authorized users or processes can access sensitive data or system resources.
Which of the following is a key feature of a distributed operating system?
A Resource Sharing
B Single Machine Control
C Centralized Memory
D Limited Scalability
A distributed operating system manages a network of independent computers, enabling them to share resources and work collaboratively as a unified system, improving performance, reliability, and scalability.
Which security measure is used to prevent unauthorized access to system resources?
A Encryption
B Paging
C Thread Synchronization
D Access Control
Access control mechanisms restrict unauthorized users or processes from accessing system resources. It ensures that only users with appropriate permissions can access files, applications, or devices on the system.
What is the main advantage of cloud-based operating systems?
A Local Resource Management
B Limited Data Storage
C Scalability and Flexibility
D Single User Access
Cloud-based operating systems provide scalability and flexibility by allowing users to scale resources up or down based on demand. They also enable remote access to resources, improving system flexibility and resource management.
Which of the following is a potential risk in a distributed operating system?
A Resource Fragmentation
B Network Security Threats
C Centralized Control
D Single Point of Failure
In a distributed operating system, the system is reliant on network communication, which can expose it to security risks like data interception, unauthorized access, and denial-of-service attacks. Proper security measures are required to protect data during transmission.
What is a cloud-based operating system primarily designed to manage?
A Cloud Resources
B File Systems
C Process Scheduling
D Memory Allocation
A cloud-based operating system is designed to manage virtualized cloud resources, including computing power, storage, and network connectivity, allowing users to run applications and store data remotely via the cloud.
Which technique helps ensure data integrity in cloud-based operating systems?
A Memory Swapping
B File Fragmentation
C Data Replication
D Thread Synchronization
Data replication is used in cloud-based operating systems to duplicate data across multiple servers. This ensures that if one server fails, data can still be accessed from another, enhancing reliability and preventing data loss.
How do operating systems enhance security during the boot process?
A File Encryption
B Secure Boot
C Resource Allocation
D Access Control
Secure boot ensures that the operating system and its kernel are authenticated and not tampered with during the boot process. This prevents unauthorized software from being loaded, ensuring system integrity from startup.
Which of the following is an essential feature of cloud-based operating systems?
A Local Execution
B Single-User Access
C Static Resources
D Centralized Storage
Cloud-based operating systems rely on centralized storage, where data is stored in remote data centers rather than on local machines. This enables users to access data from anywhere and ensures data backup and redundancy.
What is a key challenge in managing security in distributed operating systems?
A Coordination of Security Policies
B Centralized Authentication
C Resource Allocation
D Lack of User Access
In distributed operating systems, security policies need to be coordinated across multiple machines. This ensures that all nodes in the system are secure and comply with the same authentication, encryption, and access control policies.
What is the primary purpose of encryption in operating systems?
A Data Compression
B Resource Sharing
C Protect Data Confidentiality
D Process Management
Encryption is used in operating systems to protect data confidentiality by converting sensitive information into unreadable formats. Only authorized users with the correct decryption key can access the original data.
Which of the following is a security measure that helps protect data during transmission in distributed systems?
A Data Fragmentation
B Secure Communication Protocols
C File Sharing
D Memory Management
Secure communication protocols, such as SSL/TLS, are used in distributed systems to encrypt data during transmission. This prevents data interception and ensures that data remains private and secure across the network.
What role do firewalls play in operating system security?
A Control Access to Resources
B Manage Memory Allocation
C Control Network Traffic
D Synchronize Processes
Firewalls are used to monitor and control incoming and outgoing network traffic based on predetermined security rules. They act as a barrier between a trusted internal network and untrusted external networks, helping to prevent unauthorized access.
Which type of operating system is most commonly used in embedded devices?
A Real-Time OS
B Mobile OS
C Distributed OS
D Cloud OS
Real-Time Operating Systems (RTOS) are commonly used in embedded devices that require real-time, deterministic responses to external events. They are used in systems like medical devices, automotive control systems, and industrial automation.
What is a distributed operating system designed to do with multiple computers?
A Run Separate Processes
B Control Memory
C Coordinate Shared Resources
D Provide Local Storage
A distributed operating system coordinates multiple computers working together as a unified system. It enables the sharing of resources like processing power, storage, and memory across the network, improving scalability and redundancy.