EDEXCEL IGCSE ICT QUESTIONS AND ANSWERS GRADED A+

EDEXCEL IGCSE ICT QUESTIONS AND ANSWERS GRADED A+ What is the primary function of the CPU in a computer system? The primary function of the CPU (Central Processing Unit) is to execute instructions and process data in a computer system. What does RAM stand for and what is its role in a computer? RAM stands for Random Access Memory, and it provides temporary storage for data and instructions that the CPU needs while performing tasks. What is the difference between RAM and ROM? RAM (Random Access Memory) is volatile and loses its data when power is off, while ROM (Read-Only Memory) is non-volatile and retains its data even when the power is off. What does the term 'cache memory' refer to? Cache memory is a small, high-speed memory located within or near the CPU that stores frequently accessed data to improve processing speed. 2 Why is it important to have sufficient RAM in a computer system? Sufficient RAM is important because it allows the computer to handle more tasks simultaneously and improves overall system performance and speed. What is virtual memory and how does it benefit a computer system? Virtual memory is a system that uses a portion of the hard drive as additional RAM, allowing the computer to handle more applications simultaneously and manage larger datasets. What is the role of the motherboard in a computer system? The motherboard is the main circuit board that connects and allows communication between the CPU, RAM, storage devices, and other hardware components. What does CPU clock speed measure and why is it important? CPU clock speed measures the number of cycles per second the CPU can execute, and a higher clock speed typically indicates a faster and more powerful processor. What is the purpose of the ALU (Arithmetic Logic Unit) within the CPU? The ALU (Arithmetic Logic Unit) performs arithmetic operations (such as addition and subtraction) and logical operations (such as comparisons) in the CPU. 3 What does the term 'buses' refer to in computer architecture? Buses are communication pathways that transfer data between different components of a computer, such as the CPU, memory, and input/output devices. How does secondary storage differ from primary storage? Secondary storage, such as hard drives and SSDs, provides long-term data storage and is non-volatile, while primary storage (RAM)