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COA - Quiz Day 16

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Question 1

What is the primary objective of an Instruction Set Architecture (ISA)?

  • To define the hardware implementation of the processor

  • To specify the set of instructions a processor can execute and their format

  • To design the microarchitecture of a processor

  • To optimize the processor clock speed

Question 2

Which of the following best distinguishes Microarchitecture from ISA?

  • ISA deals with implementation, Microarchitecture deals with software

  • ISA is the physical layout of circuits, Microarchitecture is the instruction set

  • ISA is a programmer-visible interface; Microarchitecture is the internal organization of the processor

  • Microarchitecture defines instruction formats; ISA defines control signals

Question 3

Which type of ISA is characterized by a large number of simple instructions and fixed instruction length?

  • RISC

  • CISC

  • VLIW

  • Stack-based

Question 4

What is a major advantage of VLIW (Very Long Instruction Word) ISA over traditional RISC?

  • Reduced code size due to variable-length instructions

  • Explicit instruction-level parallelism encoded in a single long instruction word

  • Uses a stack for operand management

  • Better backward compatibility with older ISAs

Question 5

Which addressing mode allows an instruction to directly specify the memory address of the operand?

  • Immediate

  • Register indirect

  • Direct

  • Indexed

Question 6

Which of the following instruction formats contains no operand fields?

  • Zero-address format

  • One-address format

  • Two-address format

  • Three-address format

Question 7

Why is the instruction format important in CPU organization?

  • It determines how many registers are available

  • It influences how instructions are fetched, decoded, and executed

  • It fixes the clock speed of the CPU

  • It decides the power consumption of the processor

Question 8

EPIC is designed primarily to:

  • Simplify compiler design

  • Exploit instruction-level parallelism explicitly by the compiler

  • Reduce the number of instructions executed

  • Support stack-based operations

Question 9

Compared to CISC, one characteristic of RISC ISA is:

  • Complex addressing modes

  • Variable-length instruction formats

  • Few instruction formats, mostly fixed-length

  • More micro-operations per instruction

Question 10

In a CPU instruction format, the opcode field:

  • Specifies the operation to be performed

  • Indicates the addressing mode

  • Contains the data to operate on

  • Stores the result of the operation

There are 10 questions to complete.

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