CHS-1B Review

Unit 1: Intro to Programming

What is the primary goal of decomposition in programming?

a. To combine multiple programming languages into one codebase

b. To eliminate the need for functions and procedures

c. To increase the overall complexity of the code

d. To break down a complex problem into smaller, more manageable sub-problems

d. To break down a complex problem into smaller, more manageable sub-problems

In the Karel programming language, how can decomposition be applied to solve a task like moving Karel to a specific location?

a. By directly coding Karel's actions in machine language

b. By avoiding the use of functions and writing the entire solution in the main program

c. By writing all the commands in a single function without separating them

d. By creating individual functions for moving forward, turning, and picking up objects, then combining them to achieve the task

d. By creating individual functions for moving forward, turning, and picking up objects, then combining them to achieve the task

When decomposing a complex problem into smaller functions, what is a key benefit?

a. It reduces the need for comments in the code

b. It allows each function to be developed, tested, and debugged independentlyThis is the correct answer.

c. It requires the entire program to be written at once

d. It simplifies the process of compiling the program

b. It allows each function to be developed, tested, and debugged independentlyThis is the correct answer.

In the Karel programming language, if you want to create a function to move Karel to the end of a street, which approach demonstrates proper decomposition?

a. Write the move_to_end_of_street() function without utilizing any other functions

b. Directly input all movement commands in the main code without creating separate functions

c. Define a function move_to_end_of_street() that uses other functions like move() and turn_left() to achieve the goal

d. Avoid using functions and rely solely on manual commands

c. Define a function move_to_end_of_street() that uses other functions like move() and turn_left() to achieve the goal

In Karel, single-line comments use which of the following characters before the comment:

a. hashtag

b. double quote mark

c. single quote mark

d. two forward slashes

a. hashtag

What is the primary purpose of comments in a program?

a. To execute additional code not part of the main logic

b. To increase the execution speed of the program

c. To make the code more difficult to understand

d. To explain and clarify the code for other programmers or for future reference

d. To explain and clarify the code for other programmers or for future reference

What is the primary purpose of abstraction in computer science?

a. To eliminate the need for high-level programming languages

b. To increase the amount of code needed to solve a problem

c. To ensure that all programs run at the hardware level

d. To simplify complex systems by hiding unnecessary details and focusing on essential features

d. To simplify complex systems by hiding unnecessary details and focusing on essential features

Which of the following is an example of abstraction in programming?

a. Using a function to perform a specific task without needing to understand its internal implementation

b. Manually managing memory allocation for each variable

c. Writing detailed code for every function in a program

a. Using a function to perform a specific task without needing to understand its internal implementation

In the context of software design, which level of abstraction would a user interface most likely represent?

a. Machine-level abstraction

b. Low-level abstraction

c. High-level abstraction

d. Network-level abstraction

c. High-level abstraction.

How can abstraction contribute to the maintainability of a large software project?

a. By making the code less modular and more interconnected

b. By removing the need for testing and debugging

c. By allowing developers to work with simplified models or components, making changes easier to manage

d. By increasing the complexity of the codebase

c. By allowing developers to work with simplified models or components, making changes easier to manage