paper 1

Question 1

how do you convert from binary to decimal?

Answer 1

You have to use a table that goes 1,2,4,8,16,32,64,128 to put the binary digits into and add them to get the decimal

Question 2

convert 10100101 to decimal

Answer 2

its 165

Question 3

how do you convert from decimal to binary?

Answer 3

You have to use a table that goes 1,2,4,8,16,32,64,128 to minus the biggest digit in the table as you go and represent this in 1’s and 0’s

Question 4

convert 113 to binary

Answer 4

1110001

Question 5

how do you convert from hexadecimal to binary, and then to decimal value?

Answer 5

you first seperate the two digits and then convert them separately into binary, you then put that binary together and convert all of it into decimal

Question 6

convert AF to binary then to decimal

Answer 6

the binary is 10101111 an the decimal is 175

Question 7

how do you add in binary?

Answer 7

you convert both binary digits to decimal, then you add them and convert back again, or you can add them and carry 1 over if there’s more than one in a column

Question 8

add 1011 and 0111

Answer 8

its 10010

Question 9

order these, Nibble, Terabyte, Byte, Gigabyte, Megabytes, Kilobyte,Bit

Answer 9

bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte

Question 10

what is an algorithm?

Answer 10

A set or rules or instructions that a computer/program has to follow

Question 11

what is a variable?

Answer 11

An assigned data that can be named and changed

Question 12

what is selection?

Answer 12

A question asked by the computer to be decided based on the input, that will output and answer as true or false

Question 13

what is nested selection?

Answer 13

if 1>0:

if 1>0:

Question 14

what is abstraction?

Answer 14

It involves filtering out – essentially, ignoring - the characteristics that we don’t need in order to concentrate on those that we do.

Question 15

what is validation?

Answer 15

Validation is an automatic computer check to ensure that the data entered is sensible and reasonable. It does not check the accuracy of data.

Question 16

Describe a simple validation routine that could be used in a program?

Answer 16

to check that a password is 6 characters you can use an if or while statement to output a boolean statement

Question 17

Explain why code written in high level language must be translated into machine code

Answer 17

so that it can be executed by the cpu

Question 18

what translator would i use to convert assembly code into machine code

Answer 18

assembler

Question 19

what would i use to convert a high level language (like C,C++) into machine code

Answer 19

Compiler

Question 20

Explain the type of translator compiler

Answer 20

Compilers are used to convert high level languages (like C, C++ ) into machine code .

Question 21

Explain the type of translator assembler

Answer 21

Assembler are used to convert assembly language code into machine code.

Question 22

Explain the type of translator interpreter

Answer 22

An interpreter is a computer program which executes a statement directly (at runtime).

Question 23

what is assembly language

Answer 23

An assembly language is a low-level programming language for microprocessors and other programmable devices. It is not just a single language, but rather a group of languages. An assembly language implements a symbolic representation of the machine code needed to program a given CPU architecture.

Question 24

what is a character set

Answer 24

a list of characters that are assigned to numbers

Question 25

what is unicode

Answer 25

a character set which contains every character from every language

Question 26

how far is unicode the same as ascii

Answer 26

they are the same up to the number 127

Question 27

what is RLE (run length encoding) frequency/data pairs.

Answer 27

a way to simplify binary (machine code), 110001000 would become 21 30 11 30, as it first says how many of that number there is and then what the number is

Question 28

what would 1011111011000 be in RLE (run length encoding) frequency/data pairs.

Answer 28

11 10 51 10 21 30

Question 29

what would 51 60 11 20 be when expanded back into binary

Answer 29

11111000000100

Question 30

Explain the Von Neumann architecture

Answer 30

His computer architecture design consists of a Control Unit, Arithmetic and Logic Unit (ALU), Memory Unit, Registers and Inputs/Outputs. Von Neumann architecture is based on the stored-program computer concept, where instruction data and program data are stored in the same memory.

Question 31

what is an embedded system

Answer 31

An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts.