Computer Science Pre Final Test

What is the main function of the CPU?

• Store data

• Execute instructions

• Provide power to the system

• Manage network connections

Answer explanation

The main function of the CPU is to execute instructions. It processes data and performs calculations as directed by the software, making it the core component for running programs and managing tasks.

Which component stores temporary information while the computer is on?

• Hard drive

• RAM

• Graphics card

• Motherboard

Answer explanation

RAM (Random Access Memory) is the component that stores temporary information while the computer is on, allowing for quick access to data needed for running applications. Unlike the hard drive, which stores data permanently, RAM is volatile.

Which of the following is an example of hardware?

• Web browser

• Processor

• Operating system

• Mobile app

Answer explanation

The processor is a physical component of a computer that performs calculations and processes data, making it hardware. In contrast, a web browser, operating system, and mobile app are all software.

The software that manages hardware and serves as a base for applications is called:

• Firmware

• Operating system

• Application

• Device driver

Answer explanation

The operating system is the software that manages hardware resources and provides a platform for applications to run. It acts as an intermediary between users and the computer hardware, unlike firmware, applications, or device drivers.

Python, Java, and C++ are:

• Programs

• Programming languages for software creation

• Devices

• Mobile applications

Answer explanation

Python, Java, and C++ are all programming languages used for software creation, enabling developers to write code that can be executed by computers. They are not programs, devices, or mobile applications.

Which programming language is used in MakeCode to program the Micro:bit?

• HTML

• JavaScript

• Visual blocks, JavaScript and Python

• Python

Answer explanation

MakeCode for Micro:bit supports multiple programming languages, including visual blocks, JavaScript, and Python. Therefore, the correct answer is 'Visual blocks, JavaScript and Python' as it encompasses all options available.

What is the first step in the Design Thinking process?

• Prototype

• Empathize

• Define

• Evaluate

Answer explanation

The first step in the Design Thinking process is to 'Empathize'. This involves understanding the needs and experiences of users, which is crucial for developing effective solutions.

In the prototyping stage, the goal is to:

• Identify the target audience

• Build a tangible solution

• Analyze design errors

• Document results

Answer explanation

In the prototyping stage, the primary goal is to build a tangible solution that can be tested and refined. This allows for practical feedback and adjustments, making it essential to focus on creating a physical representation of the design.

An algorithm is:

• A piece of hardware

• A set of step-by-step instructions to solve a problem

• A programming language

• A mathematical function

Answer explanation

An algorithm is defined as a set of step-by-step instructions designed to solve a problem. This distinguishes it from hardware, programming languages, and mathematical functions, which serve different purposes.

A good algorithm should be:

• Clear and precise

• Complex and detailed

• Difficult to understand

• Only for experts

Answer explanation

A good algorithm should be clear and precise, making it easy to understand and implement. Complexity and difficulty hinder usability, while clarity ensures that it can be used by a wider audience, not just experts.