Internet 1

A task takes 20 seconds to complete on a single processor. If the task is split perfectly across 4 processors, assuming no overhead or communication delay, how long would the task take to complete?

• 2 seconds

• 5seconds

• 10 seconds

• 12 seconds

In a parallel computing task with minimal communication overhead, which of the following generally leads to a faster overall processing time?

• Increasing the number of processors

• Increasing the amount of communication between processors

• Increasing the size of the problem

• Increasing the overhead for task coordination

Which of the following best describes a phishing attack?

• Infecting a computer with a virus that corrupts data.

• Sending an email that appears to be from a legitimate source to trick individuals into providing personal information

• Installing malware through a downloaded file.

• Using encryption to protect data during transmission.

What distinguishes a Trojan horse from other types of malware?

• It replicates itself and spreads across systems like a worm.

• It encrypts files on the victim’s computer and demands a ransom.

• It attacks the system's hardware directly.

• It disguises itself as a legitimate program but contains harmful code.

What is the main goal of fault tolerance in a computer system?

• To prevent any hardware failures from occurring.

• To automatically detect and remove viruses from the system.

• To avoid the need for backups.

• To ensure a system can continue functioning even when one or more components fail.

Which of the following techniques is commonly used to achieve fault tolerance?

• Adding redundant components, such as multiple power supplies or hard drives.

• Using faster processors.

• Decreasing the load on the system by limiting the number of users.

• Implementing software updates regularly.

What is the internet?

• A private network used by organizations.

• A type of computer used for data storage.

• A network of networks that connects millions of computers globally.

• A large software program used by companies.

An IP address is:

• A physical component of a computer.
  

• )A website address.

• A unique numerical label assigned to devices connected to the interne

• A type of computer virus.

What is the purpose of the Domain Name System (DNS)?

• To create new websites.

• To translate domain names like www.example.com into IP addresses.

• To secure websites with encryption.

• To block spam emails.

What is the primary difference between a network switch and a wireless access point?

• A switch is used to connect devices to a VPN, while an access point is used for managing IP addresses.

• A switch connects wireless devices to the internet, while an access point connects wired devices.

• A switch controls the internet speed, while an access point manages security protocols.

• A switch forwards data between wired devices on a local network, while an access point provides wireless connectivity for devices to join a network.