COA_Ch04_InClass-2

COA_Ch04_InClass-2

8 Qs

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COA_Ch04_InClass-2

COA_Ch04_InClass-2

Assessment

Quiz

others

Practice Problem

Easy

Created by

Chun-Jung Lin

Used 9+ times

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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 6 pts

The ___________ of a machine specifies the instructions that the computer can perform and the format for each instruction.

control unit
CPU
instruction set architecture
fetch-decode-execute cycle

2.

MULTIPLE CHOICE QUESTION

30 sec • 6 pts

The _____ register keeps track of the next instruction to be fetched.

program counter
accumulator
address register
memory buffer register

3.

MULTIPLE CHOICE QUESTION

30 sec • 6 pts

The register that holds the actual data to be read from or written to a given memory address is called:

memory address register
index register
memory buffer register
none of these

4.

MULTIPLE CHOICE QUESTION

30 sec • 6 pts

Which MARIE instruction is being carried out by the RTN statement that follows? PC ← X

Store X
JnS X
Load X
Jump X

5.

MULTIPLE CHOICE QUESTION

30 sec • 6 pts

Among other things, assembler directives can:

determine the next action after numeric overflow
distinguish a value as hexadecimal or decimal
invoke interrupt service routines
control conditional assembly using macro instructions

6.

MULTIPLE CHOICE QUESTION

30 sec • 6 pts

One good reason to use assembly language is to compensate for shortcomings in optimizing compilers for higher-level languages. Interrupt checking is typically carried out at various times during the execution of a machine instruction.

True
False

7.

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

During the second pass of an assembler:

instructions are only partially assembled
the symbol table is only partially completed
addresses from the symbol table are placed in object code
external code is merged with the object code

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