Computer Science 9

Telephone numbers usually have 9 digits. The first two digits represent the area code and remain constant. The last 7 digits represent the number and cannot begin with 0. How many different telephone numbers are possible with a given area code?

The total number of possible telephone numbers is determined by the number of possible combinations for the last 7 digits. Each of the 7 digits can be any number from 1 to 9 for the first digit (9 choices) and any number from 0 to 9 for the remaining six digits (10 choices each).Thus, the … Read more

Why do we need to think computationally?

We need to think computationally because it helps in breaking down complex problems into simpler, solvable parts, making it easier to find solutions. Computational thinking promotes efficiency and creativity in problem-solving and is essential in today’s digital world, where many fields, such as science, engineering, and economics, rely on computer-based models and simulations to tackle … Read more

Identify three computing problems from other subjects you are studying.

Three computing problems from other subjects could include: Mathematics: Solving algebraic equations or finding the roots of polynomials, which can be done using algorithms. Physics: Simulating physical systems or solving problems related to motion using computational models. Economics: Analyzing large sets of economic data to predict market trends or model economic behaviors using machine learning … Read more

Which computational thinking technique breaks down a problem into smaller parts?

The computational thinking technique that breaks down a problem into smaller parts is Decomposition. Decomposition involves dividing a complex problem into smaller, more manageable sub-problems that can be solved individually. This makes it easier to focus on specific aspects of the problem and work through them systematically. Related Questions: What is the major difference between … Read more

What are the methods used to design a solution?

The methods used to design a solution include: Flowcharts: Diagrams that represent the steps of a process in a sequential manner. Pseudocode: A textual representation of the steps of an algorithm, written in an easy-to-understand format. IPO Charts: Diagrams that show the input, process, and output of a program. Prototyping: Creating an early model or … Read more

Write four properties of computational thinking.

The four properties of computational thinking are: Decomposition: Breaking down complex problems into smaller, more manageable parts. Pattern Recognition: Identifying similarities or trends within the data or problem. Abstraction: Simplifying a problem by focusing on the important details while ignoring unnecessary complexity. Algorithm Design: Creating step-by-step instructions (algorithms) to solve a problem or perform a … Read more

Why do software designers prefer to use IPO charts?

Software designers prefer using IPO (Input-Process-Output) charts because they provide a simple and clear way to visualize the flow of a program. IPO charts help in identifying the data needed for the program (input), the operations or processes that must be performed on that data (process), and the result that is produced (output). This structured … Read more

What is the major difference between solving simple problems and complex problems?

The major difference between simple and complex problems lies in the scope and number of variables involved. Simple problems usually have clear, straightforward solutions that require less time and effort to solve. Complex problems, on the other hand, have multiple components, uncertain factors, or a variety of constraints, making them more difficult to solve. Solving … Read more

Explore common applications of the Internet and their impact on various aspects of society, including communication, education, business, entertainment, and research.

The internet has become an essential part of daily life, transforming various aspects of society: Communication: The internet has revolutionized communication through email, instant messaging, and social media platforms like Facebook, Twitter, and WhatsApp. These tools enable real-time communication with anyone, anywhere in the world. Education: Online learning platforms like Coursera, Khan Academy, and edX … Read more

Discuss the advantages and disadvantages of the Internet, considering factors like global connectivity, information access, privacy concerns, and digital addiction.

The internet has both profound advantages and serious drawbacks that affect individuals, businesses, and societies. Advantages: Global Connectivity: The internet connects people around the world, allowing for instant communication, collaboration, and the sharing of information. Access to Information: The internet provides a vast repository of information and resources, making it a critical tool for learning, … Read more