Question 1

Resolution of bitmap graphics is typically measured in ___________.

Accepted Answer

The resolution of bitmap graphics is the number of pixels that make up the image, so the correct choice is pixels. Megabytes and kilobytes measure file size, while frames refer to animation or video.

Question 2

During which software development phase do users begin using an app?

Accepted Answer

Users typically begin using an app during the implementation phase, after development and testing have been completed and the app is ready to be deployed.

Question 3

The quality of an audio file is determined by _____.

Accepted Answer

The quality of an audio file is determined by its bit rate, which refers to the amount of data that is processed per unit of time. Higher bit rates generally result in better audio quality. Choices A, B, and C are related to visual files such as images and videos, and do not apply to audio files.

Question 4

A bitmap image is provided in two different resolutions.Image 1 has a resolution of 1500 x 1225.Image 2 has a resolution of 500 x 350.Which of the following statements is true when the sizes of both the files are increased by 25 percent?

Accepted Answer

The size of the files will increase by 25 percent irrespective of their original resolutions. Since Image 1 has a higher resolution than Image 2, it will have more pixels than Image 2. When both the images are increased in size by 25 percent, Image 1 will have more pixels, which means its file size will increase more than Image 2. Also, since Image 1 has a higher resolution, it is sharper than Image 2. Therefore, the correct choice is c.

Question 5

Sherry is concerned that a new app her team is developing might not meet the customer's schedule.What can her team do to determine whether they can complete the project on time or should scale back features in the app?

Accepted Answer

Completing a feasibility study will help the team to determine whether the project can be completed on time and within budget. The feasibility study will identify potential risks and issues that could impact the project's timeline, allowing the team to make informed decisions about whether to proceed as planned or scale back features to meet the customer's schedule. Allocating resources to the app's development or developing a prototype may help with the project's development, but they do not specifically address whether the project can be completed on time. Submitting a system proposal is a step in the project planning process but does not directly address the team's concerns about meeting the customer's schedule.

Question 6

Talis shoots a photo with his 20 megapixel digital camera.How is the image stored as digital data?

Accepted Answer

Digital cameras store images as a list of binary color numbers for all the pixels it contains. Each pixel is represented by a set of numbers that determines its color and intensity, which is then converted into binary code and stored on a memory card. The more megapixels a camera has, the more detailed the image will be as there are more pixels to store.

Question 7

A series of images displayed in sequence to create the illusion of movement is called ______________ .

Accepted Answer

A series of images displayed in sequence to create the illusion of movement is called an animation.

Question 8

What two factors determine the quality of digital audio?

Accepted Answer

The two factors that determine the quality of digital audio are the sampling rate and bit rate. The sampling rate is the number of times per second that the audio signal is measured, while the bit rate is the amount of data used to represent each second of audio. A higher sampling rate and bit rate will result in higher quality audio.

Question 9

Digital audio can be created by recording sound on a smartphone.

Accepted Answer

With the use of a smartphone, audio can be recorded digitally and saved as a file in various formats.

Question 10

Which of these programming languages would likely be the most difficult to learn?

Accepted Answer

Assembly language is a low-level programming language that requires a deep understanding of computer architecture and memory management. It can be very difficult to learn, especially for beginners.

Question 11

Which of the following audio formats does not use any compression technique?

Accepted Answer

WAV is an uncompressed audio format, whereas MP4, MP3 and WMA all use some form of compression to reduce file size.

Question 12

Missy just hired a software development team to create an educational simulation app for a high school course.She has specific requirements for how the app should respond to user actions.How can she communicate her specifications to the software developers?

Accepted Answer

Drawing wireframes is a common and effective way to communicate app specifications and user interface to software developers. It provides a visual representation of the app's layout and functionality, allowing developers to better understand and implement the desired features. Making a video or designing slides may not capture all the necessary details, and testing ideas with teenagers may not provide a clear and precise enough direction.

Question 13

Jason just received a prototype of the app he hired a team to develop for him.What phase of the SDLC is this project in?

Accepted Answer

The answer of Jason just received a prototype of the...

Question 14

Sergei's team is developing a new tracking app for a delivery company's fleet of trucks.The team plans to begin with a simple app, and then gradually add features over time.Which development methodology would be the best fit for this approach?

Accepted Answer

Agile development is designed for flexibility and adaptability, making it ideal for projects that require incremental improvements and ongoing changes. With its emphasis on collaboration and continuous delivery, it's the best fit for Sergei's team's plans to start simple and add more features over time. The Waterfall method, Predictive development, and Rapid application development are all less suited for this sort of incremental approach.

Question 15

Trevor has created an app that tracks fitness activities over time and generates statistics that users can share with their doctors.He's decided to make it open source so other developers can contribute to the app's evolution.How can Trevor make his code accessible to other developers who might want to participate?

Accepted Answer

Posting the source code to a code repository, such as GitHub, is a common method for making open source code accessible to other developers. It allows for easy collaboration and version control.

Question 16

Which software development role would most likely be filled by someone with an art background?

Accepted Answer

Someone with an art background would most likely have skills related to graphic design, user experience design, or user interface design which are important roles in software development.

Question 17

Mack signs into his laptop and gets a message saying all his files have been encrypted and will only be released if he sends money to the attacker.What kind of software did this?

Accepted Answer

The message about encrypted files and demanding payment is a clear indication of ransomware, which is a type of malware that holds files or systems hostage until the victim pays a ransom.

Question 18

What development methodology repeatedly revisits the design phase?

Accepted Answer

Agile development is a methodology that employs iterative and incremental approaches to software development. It repeatedly revisits the design phase to ensure that the product is meeting the changing requirements of the stakeholders.

Question 19

A process called _____ converts analog sound waves into digital sound.

Accepted Answer

Sampling is the process of taking snapshots of an analog signal at regular intervals and converting those snapshots into digital values. This is how analog sound waves are converted into digital sound that can be stored and manipulated in digital audio software. Compression, vectoring, and resolving are not directly related to the process of converting analog sound waves into digital sound.

Question 20

File types like TIF and PNG are compressed to have smaller file sizes, and when opened, the files are uncompressed and display all their original data.

Accepted Answer

TIF (when using a lossless compression method) and PNG are both capable of lossless compression, meaning they can be compressed to have smaller file sizes and when opened, the files are uncompressed to display all their original data without loss of quality.

Quiz 9: Technology and Digital Ethics