OCR A-Level CS 1.2

What is the main difference between CISC and RISC processors?

• CISC uses complex instructions, RISC uses simple instructions

• CISC has fewer instructions, RISC has more instructions

• CISC is used in low power devices, RISC is used in desktops

• CISC uses simple instructions, RISC uses complex instructions

What does the instruction set of a CPU consist of?

• A set of all instructions written in machine code

• A set of all high-level language commands

• A set of all assembly language commands

• A set of all binary numbers

Which type of processor architecture is mainly found in desktop computers and laptops?

• RISC

• CISC

• ARM

• MIPS

What is the main advantage of RISC processors?

• They require more RAM

• They are used in desktop computers

• They have more complex instructions

• They use fewer transistors and less complex hardware

Which of the following devices commonly use RISC processors?

• Mainframes

• Desktops and laptops

• Supercomputers

• Smart TVs and smartphones

What is the main focus of the CISC approach?

• Simplifying the compiler's work

• Increasing the number of registers

• Reducing the cycles per instruction

• Minimizing the number of instructions per program

Which processor architecture is known for its lower energy requirements?

• ARM

• x86

• RISC

• CISC

What is a key feature of RISC instructions?

• They are variable in length

• They are complex and multi-step

• They require multiple clock cycles

• They are fixed in size

Why did RISC processors take a long time to gain commercial acceptance?

• They were less efficient

• They were not compatible with Windows

• They were more expensive

• They lacked software support

Several CISC instructions may be equivalent to a single RISC instruction

• TRUE

• FALSE