Intro CFA 1: App Inventor And Problem Solving

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| By Melody Hagaman

Melody Hagaman

Community Contributor

Quizzes Created: 1 | Total Attempts: 115

Questions: 11 | Attempts: 115 | Updated: Apr 5, 2024

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Questions and Answers

1.

The process of keeping important information while removing unnecessary details to simplify a problem is known as.
- A.
  
  Input
- B.
  
  Problem-solving process
- C.
  
  Abstraction
- D.
  
  Software
Correct Answer
C. Abstraction

Explanation
Abstraction is the process of simplifying a problem by keeping only the important information and removing unnecessary details. It allows us to focus on the essential aspects of a problem and ignore the irrelevant or complex details. In problem-solving, abstraction helps in breaking down complex problems into manageable parts, making it easier to understand and solve. It is also a key concept in software development, where programmers use abstraction to create models and representations of real-world objects and processes.

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2.

Which of the following is NOT an example of hardware
- A.
  
  Printer
- B.
  
  An online game
- C.
  
  Keyboard
- D.
  
  Mouse
Correct Answer
B. An online game

Explanation
An online game is not an example of hardware because it is a software application that runs on a computer or a gaming console. Hardware refers to physical components of a computer system, such as a printer, keyboard, or mouse, that can be touched and manipulated. While an online game requires hardware to run, it itself is not a physical component.

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3.

Which of the following would correctly pause the MLKplayer if it's already playing and play the MLKplayer if it is not already playing?
- A.
  
  Option 1
- B.
  
  Option 2
- C.
  
  Option 3
- D.
  
  Option 4
Correct Answer
C. Option 3

Explanation
Option 3 would correctly pause the MLKplayer if it's already playing and play the MLKplayer if it is not already playing. This option likely contains the necessary code or command to check the current state of the MLKplayer and determine whether it needs to be paused or played. It may include conditional statements or logic to handle both scenarios effectively.

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4.

What is the name of a special type of block, indicated by a blue square like the one in this picture, that allows you to change the block?
- A.
  
  If-then
- B.
  
  Mutator
- C.
  
  Transformer
- D.
  
  None of these
Correct Answer
B. Mutator

Explanation
A mutator is a special type of block that allows you to change the block. It is indicated by a blue square, as shown in the picture.

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5.

Which of these is/are part of the User Interface?
- A.
  
  Sounds
- B.
  
  Buttons
- C.
  
  Text
- D.
  
  All of these
Correct Answer
D. All of these

Explanation
All of these options - sounds, buttons, and text - are part of the User Interface. Sounds can be used to provide auditory feedback or alerts to the user. Buttons are interactive elements that allow users to perform actions or navigate through the interface. Text is used to display information or instructions to the user. Therefore, all of these elements contribute to the overall user experience and are part of the User Interface.

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6.

What is the final step of the problem-solving process?
- A.
  
  Define
- B.
  
  Prepare
- C.
  
  Try
- D.
  
  Reflect
Correct Answer
D. Reflect

Explanation
The final step of the problem-solving process is to reflect. After defining the problem, preparing a plan, and trying different solutions, it is important to reflect on the outcomes and evaluate the effectiveness of the chosen solution. Reflection allows for learning from the experience and making improvements for future problem-solving situations.

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7.

What was the name of the mathematician from Hidden Figures who calculated the launch coordinates for the moon landing?
- A.
  
  Katherine Johnson
- B.
  
  Sylvia Plath
- C.
  
  Dorothy Vaughn
- D.
  
  Michelle Obama
Correct Answer
A. Katherine Johnson

Explanation
Katherine Johnson was the mathematician from Hidden Figures who calculated the launch coordinates for the moon landing.

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8.

A statement that evaluates to true or false is....?
- A.
  
  Boolean
- B.
  
  Truth table
- C.
  
  Abstraction
- D.
  
  Input
Correct Answer
A. Boolean

Explanation
A statement that evaluates to true or false is referred to as a Boolean. This term originates from George Boole, a mathematician who developed a system of logic that represents true and false values using the binary digits 1 and 0. In programming and computer science, Boolean is a data type that can have one of two values: true or false. It is commonly used in conditions and logic operations to make decisions or control the flow of a program.

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9.

What period are you in?
- A.
  
  1st
- B.
  
  5th
- C.
  
  4th
Correct Answer
A. 1st

Explanation
The given options suggest different periods, and the correct answer is "1st." This implies that the question is asking about the current period the person is in.

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10.

Which of these is an example of an input/event?
- A.
  
  A sound plays on your app
- B.
  
  The code for your app
- C.
  
  The user presses a button
- D.
  
  All of these
Correct Answer
C. The user presses a button

Explanation
An input/event refers to an action or occurrence that triggers a response in a system. In this case, the user pressing a button is an example of an input/event because it is an action performed by the user that prompts a reaction or response from the app. The sound playing on the app and the code for the app are not examples of inputs/events as they do not involve an external action or occurrence that triggers a response. Therefore, the correct answer is the user presses a button.

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11.

A device or component that receives information from a computer; the information a computer gives the user.
- A.
  
  Output
- B.
  
  Input
- C.
  
  Event
- D.
  
  Software
Correct Answer
A. Output

Explanation
An output device or component is used to receive information from a computer and display or transmit it to the user. It can be a monitor, printer, or any other device that presents the information generated by the computer. In contrast, an input device is used to provide information to the computer for processing. An event refers to an occurrence or action that triggers a response from the computer system, while software refers to the programs and applications that run on a computer.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Apr 05, 2024

Quiz Edited by
ProProfs Editorial Team
Sep 18, 2018

Quiz Created by
Melody Hagaman

Intro CFA 1: App Inventor And Problem Solving

The process of keeping important information while removing unnecessary details to simplify a problem is known as.

Which of the following is NOT an example of hardware

Which of the following would correctly pause the MLKplayer if it's already playing and play the MLKplayer if it is not already playing?

What is the name of a special type of block, indicated by a blue square like the one in this picture, that allows you to change the block?

Which of these is/are part of the User Interface?

What is the final step of the problem-solving process?

What was the name of the mathematician from Hidden Figures who calculated the launch coordinates for the moon landing?

A statement that evaluates to true or false is....?

What period are you in?

Which of these is an example of an input/event?

A device or component that receives information from a computer; the information a computer gives the user.