COA_Ch05_Exam

General-purpose architectures are divided into three groups:

• memory-memory, register-memory, and load-store
• stack addressing, accumulator addressing, and register addressing
• Von Neumann, parallel, and quantum
• Windows, Mac, and Linux

Consider the infix expression: 16/(5+3). The equivalent postfix (reverse Polish notation) expression is:

• 16/8
• 16 / 5 + 3
• 16 5 3 + /
• 5 3 + / 16

Consider the postfix (reverse Polish notation) 10 5 + 6 3 - /. The equivalent infix expression is:

• (10+5)/(6-3)
• 選項 2
• 10/5+(6-3)
• (10+5)-(6/3)

A stack-organized computer uses _______ addressing.

• indirect
• zero
• indexed
• direct

If the opcodes field for an instruction has n bits, that means there are _______ potential distinct operations.

• 2n
• n/2
• 2^n
• n^2

A “subtract” statement is an example of:

• an arithmetic instruction
• a data movement instruction
• a Boolean logic instruction
• a bit manipulation instruction
• an input/output instruction

Examples of hazards in pipelines include:

• resource conflicts, data dependencies, and conditional branch statements
• superscalar and VLIW
• addressing modes and memory
• ILP and VLIW

Variable-length instructions are easier to decode than fixed-length instructions.

• True
• False

Fixed-length instructions always have the same number of operands.

• True
• False

The best architecture for evaluating postfix notation is the stack-based architecture.

• True
• False