topic 6 fundamentals of compter systems

Question 1

software is

Answer 1

program code, sequences of instructions which are executed in order to perform a task

Question 2

application software

Answer 2

name given to programs that complete specific task

Question 3

system software

Answer 3

operates , controls and maintains the computer and its components

Question 4

utility programs

Answer 4

housekeeping tasks include; data backup, encryption, data compression

Question 5

library programs

Answer 5

contain useful functions frequently used by program

Question 6

translators

Answer 6

pieces of software translate between different types of language

Question 7

three types of translator

Answer 7

compilers
assemblers
interpreters

Question 8

machine code uses

Answer 8

only 1 and 0, directly manipulates cpu

very long program, prone to errors

Question 9

assembly language

Answer 9

simplify process of writing computer program

Question 10

assemblers translate

Answer 10

assembly lang into machine code

Question 11

compilers translate

Answer 11

high level languages into machine code

Question 12

interpreters translate

Answer 12

high level lang into machine code

line by line

Question 13

compiler vs interpreter

Answer 13

compiler
checks source line by line
entire code translated at once
protects the source code from extraction

interpreter
translation begins immediately
eachline is checked for errors
offers little protecion to source code

Question 14

source code and object code

Answer 14

source code = input to translator

object code = translator’s output

Question 15

NOT

Answer 15

has one input one output

output is always oppo to input

Question 16

AND

Answer 16

two inputs
output the product of 2 input
output is true when input is true

Question 17

OR

Answer 17

two input
outputs the sum of its inputs
only outputs false when both are false

Question 18

XOR

Answer 18

short for exclusively or

output true when only one input is true

Question 19

NAND

Answer 19

short for not and
combo of two gates NOT and AND
same as AND but with reversed output

Question 20

NOR

Answer 20

short for NOT OR
combo of Not and OR
same as OR just ouput reversed

Question 21

de morgan law break..

Answer 21

break the bar and change the sign