CSP Unit 2 Flashcards
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Questions and Answers

What would be the final value of the variable third once the following program is complete? first ← 2, second ← 3, third ← first * second, second ← third - first, first ← first + second + third, third ← second * first

48

What is the most appropriate substitute for the missing Boolean operator if the intention is to display 'True' for only values of x between, but not equal to values of 0 and 10?

AND

Which CollegeBoard AP Computer Science Principles pseudocode command is used to record something typed by a user of the program?

INPUT ()

What would be displayed if age were initialized with a value of 18?

<p>Group 2</p> Signup and view all the answers

What could be substituted into the section of the code below marked < missing code > to accurately calculate the volume of a rectangular prism based on the user input of l, w, and h?

<p>l * w * h</p> Signup and view all the answers

Which assumption cannot be inferred as a direct consequence of Moore's Law, describing the rate at which the number of transistors on a single chip doubles over time?

<p>Five years from now, web pages will require less memory (RAM) than today's web pages.</p> Signup and view all the answers

What is displayed if the user enters '16' and then 'coffee' for their preferred beverage and size?

<p>Short coffee</p> Signup and view all the answers

If the variables onTime and absent both have the value false, what is displayed as a result of running the code segment?

<p>Better late than never.</p> Signup and view all the answers

What is displayed if the elevator is currently on the 7th floor (level = 7) and the person presses a button labeled 'up 3 floors'?

<p>Level 8 Level 9 Cannot go up. Level 9</p> Signup and view all the answers

What best describes the result of running the following code segment?

<p>Nothing is displayed; the program results in an infinite loop.</p> Signup and view all the answers

What values of A, B, and C will cause the code to display 'Invalid Input'?

<p>A = -5, B = 0, C = 0</p> Signup and view all the answers

After running the code segment, which location shows the robot's position?

<p>In the middle facing down</p> Signup and view all the answers

What conditions must be satisfied by the user-inputted values of x and y for the program to display 'Right Right'?

<p>x must be 0 and y must be a positive number</p> Signup and view all the answers

What is the maximum possible value of answer after running the program with x as an integer between 5 and 10 inclusive?

<p>20</p> Signup and view all the answers

What best describes the likely results of testing both binary and linear search algorithms on lists 10 times as long?

<p>The binary search will still be faster on average than the linear search, and the difference in run times will be significantly more than 10 times greater than for shorter lists.</p> Signup and view all the answers

Which of the following gives the best ways in which creating a new block (procedure) in Scratch could be beneficial to Sally? Select two answers.

<p>The procedure can make the code section more abstract, so she doesn't have to think through all 10 blocks each time she comes across them in her code.</p> Signup and view all the answers

Which block would be the most appropriate as the missing condition in the 'Guess the Number' game?

<p>secret number &lt; guess</p> Signup and view all the answers

Which two of the following values are more likely to be displayed when the block of code is run? Select two answers.

<p>12</p> Signup and view all the answers

Which of the following algorithms require both selection and iteration? Select two answers.

<p>An algorithm that, given a list of integers, displays the number of even integers in the list.</p> Signup and view all the answers

Study Notes

Variables and Arithmetic Operations

  • The variable third ultimately holds a value of 48 after various arithmetic operations involving first and second.
  • Sequence of operations significantly alters the values of the variables through multiplication, addition, and assignments.

Boolean Logic

  • To correctly check if x is strictly between 0 and 10, the suitable Boolean operator is AND.

User Input in Programming

  • The command INPUT() is essential for retrieving user data within a program and storing it for further processing.

Conditional Outputs

  • If the variable age is initialized to 18, the output of an unspecified conditional code segment would be "Group 2".

Volume Calculation

  • The formula to calculate the volume of a rectangular prism is expressed as l * w * h, summing the inputs for length, width, and height.

Moore's Law

  • Moore's Law suggests exponential growth in transistor counts, but it cannot directly infer that web pages will require less memory in five years.

User Interaction

  • If a user inputs "16" for size and "coffee" for beverage, the displayed output will be "Short coffee".

Conditional Checks

  • If both onTime and absent hold a value of false, the output will state "Better late than never".

Elevator Simulation

  • For an elevator starting on Level 7 when a user presses "up 3 floors," the output will display "Level 8 Level 9 Cannot go up. Level 9".

Problem Solving and Algorithms

  • Statements about a currently unsolvable problem may include possibilities of future algorithm development, current technological limitations, or intrinsic impossibility to develop a solution.

Code Behavior

  • Running a specific code segment could result in an infinite loop, leading to no outputs being displayed.

Input Validation

  • User inputs of A = -5, B = 0, and C = 0 will cause the program to display "Invalid Input".

Robot Movement on Grid

  • After executing movement commands, the robot starting at the bottom left will end up in the middle facing down.

Input Conditions

  • For a program to display "Right Right", the user must input x as 0 and y as a positive number.

Maximum Values in Programs

  • If x is an integer between 5 and 10, the maximum possible value for answer afterwards could be 20.

Search Algorithm Comparison

  • Binary search is expected to consistently be faster than linear search, with growing differences in performance as list sizes increase.

Code Simplification

  • Creating a new procedure to consolidate repetitive code patches helps in error correction and improves code abstraction, facilitating easier debugging.

Game Logic Implementation

  • An appropriate condition for checking user guesses in a "Guess the Number" game is when the secret number is less than the guessed value.

Code Output Prediction

  • Among various possible outputs, values like 12 and 14 are statistically more likely to be displayed than others when the specified block of code runs.

Algorithms Requiring Selection and Iteration

  • Examples of algorithms that necessitate both selection and iteration include counting even integers from a list, which engages logical selection processes alongside repetitive counting.

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Test your understanding of concepts in Unit 2 of the Edhesive Computer Science Principles course with these flashcards. The questions cover variable assignments, calculations, and Boolean logic used within programming. Dive into the essentials of computation and enhance your coding skills.

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