Free Introduction to Bachelor of Computer Science Degree Questions and Answers — Questions and Answers
Question 1: Every night at midnight, you realize that some data are being secretly uploaded from your PC device to an unknown website. When you open the file, you discover that these documents are from the day's office job. What kind of instance is this?
- Keylogger Attack (Correct answer)
- Computer Virus
- Phishing Attack
- Network Worm
Correct answer: Keylogger Attack
A keylogger is a type of malicious software or hardware that records every keystroke made on a keyboard. If data from your daily office job is being secretly uploaded from your PC, it strongly indicates that a keylogger has captured your input, such as documents typed or accessed, and is transmitting this sensitive information to an unauthorized third party. This perfectly matches the description of data exfiltration based on user activity.
Question 2: The payroll department of an organization sends an email to all of its employees. It specifies that in order for their paychecks to be sent to their accounts, the employees must transmit their updated banking information by the end of the day. <br> When questioned, the payroll division asserts that they have never sent such an email. What sort of example is that?
- Malware Insertion Point
- Phishing Attack (Correct answer)
- Keylogger Attack
- Computer Virus
Correct answer: Phishing Attack
A phishing attack involves sending fraudulent communications that appear to originate from a legitimate and trusted source, such as a company's payroll department. The goal is to deceive recipients into divulging sensitive information, like banking details, or performing actions that compromise security. The scenario, where an email requests updated banking information but the legitimate payroll department denies sending it, is a classic example of a phishing attempt designed to steal financial data.
Question 3: Before granting employees access to a website, a corporation demands multi-factor authentication. Employees are required to use a security token that is texted to their mobile phones as one of the authentication elements. <br> What qualifies the employee in this system?
- Knowledge
- Possession (Correct answer)
- Inherence
- Facial Features
Correct answer: Possession
Multi-factor authentication typically relies on categories like 'something you know' (e.g., password), 'something you have' (e.g., a physical token or phone), and 'something you are' (e.g., biometric data). In this system, the security token texted to an employee's mobile phone falls under the 'possession' category. The employee must physically possess their mobile phone to receive and use this authentication element.
Question 4: Both sequential and parallel computing models are used to complete the same work. The sequential setup took 30 seconds, whereas the parallel model only needed 10 seconds. <br> What will the speedup parameter be going forward when using the parallel model?
- 3 (Correct answer)
- 0.333
- 200
- 300
Correct answer: 3
Speedup is a performance metric calculated by dividing the execution time of a task on a sequential system by its execution time on a parallel system. In this case, the sequential setup took 30 seconds, and the parallel model took 10 seconds. Therefore, the speedup parameter is 30 seconds / 10 seconds, which equals 3. This indicates the parallel model is three times faster.
Question 5: For its newest autonomous vehicles, Ford Motor Company plans to create its own sensors. What scenario, where these sensors are simulated, would not constitute a parameter for testing?
- Whether the sensor can sense multiple obstacles simultaneously
- Whether the sensor can judge distance from different obstacles
- Whether a swerve around a bend would cause a car accident (Correct answer)
- No incidents will be simulated
Correct answer: Whether a swerve around a bend would cause a car accident
The question asks for a scenario that would *not* be a parameter for testing the *sensors* themselves. While a swerve causing an accident is a critical outcome for an autonomous vehicle, it tests the entire vehicle's control system, decision-making algorithms, and safety protocols, not solely the sensor's ability to detect and judge obstacles. Sensor testing focuses on their accuracy, range, and ability to perceive the environment, not the vehicle's reaction to that perception.
Question 6: Customers can access information on the chosen shirts before making their purchase by logging into their account on an online retailer of shirts. <br> The ID, Type, price, size, color, and number of units for the chosen shirt are only a few pieces of information about the shirts. What further data can be gleaned from the readily available dataset?
- Which type of shirt is more popular among children
- How many shirts were sold in the previous month
- Which colors of shirts do men prefer
- What shirt items are currently out of stock (Correct answer)
Correct answer: What shirt items are currently out of stock
The provided dataset includes the 'number of units' for each chosen shirt. This piece of information directly indicates the current inventory level for specific shirt items. By checking if the 'number of units' for any particular shirt ID, type, size, or color is zero, the system can readily determine which shirt items are currently out of stock. The other options would require additional data not present in the given dataset.
Question 7: By examining and compiling data on the many bird species, their nests, and their capacity to rear their young, a biologist is exploring the behavior of birds when they build their nests. <br> Which of the following, if it is included in the dataset, would serve as an illustration of metadata from the following data?
- The number of eggs in a nest
- The location of a nest
- The incubation periods of the eggs from each species
- The tracking number assigned to the nest (Correct answer)
Correct answer: The tracking number assigned to the nest
Metadata is data that provides information about other data. In this context, the tracking number assigned to the nest serves as an identifier that helps organize, manage, and locate the primary data associated with that specific nest. It describes the data's identification and structure rather than being a direct observation or measurement of the bird's behavior or nest characteristics, such as the number of eggs or location.
Free Introduction to Bachelor of Computer Science Degree Questions and Answers
Every night at midnight, you realize that some data are being secretly uploaded from your PC device to an unknown website.
When you open the file, you discover that these documents are from the day's office job.
What kind of instance is this?