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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 portable

to be low level languages

to be high level languages

to be machine code replicas

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

flexible machine code set that can be used by anyone

CPU for every single instruction

specific machine code instruction set.

computer graphics card for every machine code instruction

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

high level games like hang man

embedded systems

websites

None of the above

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

one to many (1:m)

three to three (3:3)

one to one (1:1)

two to two (2:2)

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

1st Generation

3rd Generation

4th Generation

2nd Generation

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

An interpreter

A basic translator (IBM)

An assembler

No Translator

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

2nd Generation

3rd Generation

4th Generation

1st Generation

9. An advantage of low level languages is that:

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

it produces programs of a relatively smaller file size

None of the above

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

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 closer to the machine and machine code

It is easier to understand (by a programmer)

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

FALSE

TRUE

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 a printer

model of a spacecraft of the future

model of the monitor of a computer

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).

spatial awareness meter

Cartal model of computers

None of the above

Von Neumann architecture

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.

gentrified code

C code

python code

machine 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

not need to rewrite the code at all

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

None of the above

need to make a copy of your old CPU

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

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

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

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

is soft and cuddly, and therefore programmer's favourite

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

a device driver

an online shop

a website for a government

a personal fitness app for Android

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

fast and efficient

None of the above

easily understandable in terms of the code

slow and careful

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

add
lock
subtract
load
compare
branch
store

load

lock

subtract

add

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

adds the value 50 to the loaded value before it

None of the above

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

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.

None of the above

AL instruction

MOV instruction

34h part of the code

25. Operands are…

tiny bits that are used to code in assembly language

manipulated by the opcode

little bits of beauty

manipulated directly by a high level language command

26. What does this LMC program do?

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

adds two numbers and displays the sum

None of the above

takes in three numbers and stores them

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

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

sorts three numbers from smallest to largest

finds out if an input number is positive or negative

determines the bigger of two numbers by using loops

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 ……..

subtraction!

addition!

stubborn and persistent hard coding

nothing - this cannot be done!

29. Assembly language is written using:

Hex code

Mneumonics

None of the above

ASCII code

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

TRUE

FALSE

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