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08 - Final Test

1. What is a possible reason for the fact that most computer programs are written in low level languages?

Because low level languages are much easier to understand (from a coder's perspective)

Because low level languages are much quicker and have larger, more complex files

Trick question! Most computer programs are written in high level languages as they are easier to understand/work with

Because the first programs were low level and this ideology stuck with coders

2. Machine code and Assembly language are both considered…

to be high level languages

to be low level languages

to be portable

to be machine code replicas

3. Processors execute machine code and that each type of processor has its own __________________________

CPU for every single instruction

computer graphics card for every machine code instruction

flexible machine code set that can be used by anyone

specific machine code instruction set.

4. Assembly language is often used to develop software for _______________ and for controlling specific hardware components.

embedded systems

high level games like hang man

None of the above

websites

5. Understand that assembly language has a ______ correspondence with machine code

three to three (3:3)

one to one (1:1)

one to many (1:m)

two to two (2:2)

6. Machine code is used in which generation of a programming language?

2nd Generation

3rd Generation

1st Generation

4th Generation

7. Which language translator is needed for the 1st generation?

A basic translator (IBM)

An assembler

An interpreter

No Translator

8. Which generation would create the fastest code to execute?

4th Generation

1st Generation

3rd Generation

2nd Generation

9. An advantage of low level languages is that:

None of the above

it produces programs of a relatively smaller file size

it produces complex large files that are robust and useful for the programmer

it produces great big programs that are complex and difficult to manage

10. An advantage of a high level language is that:

Note: remember that ultimately, all low and high level languages need to be converted into machine code

It is easier to understand (by a programmer)

It is closer to the machine and machine code

None of the above

It is useful for device drivers

11. Low level languages are said to have a one to many relationship with high level languages

TRUE

FALSE

12. The Little Man Computer is a very simple yet powerful ….

This is a great introductory video to LMC - have a watch if you are able.

model of the monitor of a computer

model of a printer

model of a spacecraft of the future

model of a computer!

13. Read the excerpt on LMC and fill in the blanks

LMC is a simulator which has many of the basic features of a 
modern computer that uses the __________________________ (a central 
processing unit consisting of an arithmetic logic unit and
registers, a control unit containing an instruction register 
and program counter, input and output mechanisms and RAM to 
store both data and instructions).

Cartal model of computers

spatial awareness meter

Von Neumann architecture

None of the above

14. The LMC is based on the idea of a 'Little Man' acting like the control unit of a CPU, _________________ them as well as managing the input and output mechanisms.

fetching instructions from RAM, decoding and executing

None of the above

catching 1s and 0s as they pass through the computery ether and making

riding through metaphorical hills and valleys and enjoying

15. The 100 memory addresses in the computer memory are numbered 0 to 99 and can each contain a________________ instruction or data.

python code

gentrified code

machine code

C code

16. Each assembly language instruction is made up of a 3 letter mnemonic usually followed by the memory address of the data the CPU is to act on

TRUE

FALSE

17. One disadvantage or issue with assembly language is that the code only works on a specific CPU family. If you use a different CPU you would

need to re-write the code using a different version of assembly language

None of the above

not need to rewrite the code at all

need to make a copy of your old CPU

18. The main advantage of assembly language is that it :

is soft and cuddly, and therefore programmer's favourite

runs fast compared to programs written in a high level language as there is less code overall

runs slow compared to high level languages which makes it easy to follow

is robust and hardy and cannot ever make a mistake (hence it's popular use in spacecraft)

19. An example of a program that is typically written in assembly language is:

a website for a government

a personal fitness app for Android

an online shop

a device driver

20. Device drivers need to be as ______________ as possible which is why assembly language is perfect

None of the above

slow and careful

easily understandable in terms of the code

fast and efficient

21. Which of the following is NOT a typical assembly language command.

add
lock
subtract
load
compare
branch
store

subtract

load

lock

add

22. An example of an assembly code mneumonic is LDA 50 which…

None of the above

stores the value 50, fifty times into fifty registers in the CPU

adds the value 50 to the loaded value before it

stores (loads) the value 50 into a register in the CPU

23. In this example: LOAD 0004, it can be said that 'LOAD' is the opcode and the second part 0004 is the memory address

TRUE

FALSE

24. In the command MOV AL 34h…the opcode is the __________ instruction and the other parts are called OPERANDS.

MOV instruction

34h part of the code

None of the above

AL instruction

25. Operands are…

tiny bits that are used to code in assembly language

little bits of beauty

manipulated directly by a high level language command

manipulated by the opcode

26. What does this LMC program do?

INP 
STA A 
INP 
STA B 
LDA A 
ADD B 
OUT 
HLT
A    DAT
b    DAT

takes in three numbers and stores them

adds two numbers and displays the sum

None of the above

take in two numbers and stores them, displaying the first number

27. This LMC program doesn't add or subtract. What does it do?

INP 
STA A 
INP 
STA B 
LDA A 
SUB B 
BRP isPositive
LDA B
OUT
HLT 
isPositive
LDA A 
HLT
A    DAT
B    DAT

finds out if an input number is positive or negative

sorts three numbers from smallest to largest

determines the bigger of two numbers by using loops

loads two letters 'A' and 'B' and determines which one comes first

28. The LMC can add or subtract numbers, but it can neither multiply nor divide. The multiplication can be carried out with the aid of ……..

stubborn and persistent hard coding

subtraction!

nothing - this cannot be done!

addition!

29. Assembly language is written using:

None of the above

Hex code

ASCII code

Mneumonics

30. Assembly language instructions like MOV or ADD are called operands

FALSE

TRUE

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