quick Flashcards
immediate addressing (“LDA005”)
load the value “005” into the accumulator
feature of assembly language
commands have a one-to-one relationship with machine code
RIPA - regulates the power of public bodies to : (3)
- carry out investigations
- interceptions of communications
- grants certain public bodies(MI5, police)
what are examples of interceptions that public bodies have the right to
examples(phone calls, emails, SMS)
what is the dampening factor used for
used to prevent pages from having too much influence(on pagerank value)
When does record locking happen and what level does it happen at
when the user wants to modify a record the DBMS will lock it.
done at reord level NOT at table level.
what is thinking ahead
identifying all the inputs and outputs required for a system before its implemented
what is problem recognition
identifying the key requirement of a solution
what is decomposition
breaking down a problem into smaller sub-problems
what is market failure
when the price mechanism leads to a misallocation of resources
what makes an algorithm computational (2)
- it has a step by step sequence of instructions
- it has an output
what is the purpose of the FDE cycle
to move the next instruction from RAM to the CPU, where it will be executed
what are the factors that impact the supply of labour(5)
- infrastructure (ability to commute from/to work)
- skills required
- differences in wages between countries
- monetary and non - monetary benefits(bonuses, free healthcare)
- housing costs in a particular area
what happens in the fetch stage during the FDE
- the address of the PC is copied into the MAR + the contents are placed into the MDR
what happens in the decode stage during the FDE
- the CU is responsible for decoding + the contents in the CIR are decoded into operand and opcode
what happens in the execute stage during the FDE
- the logic operation is carried out by the ALU. the results are stored in the ACC
what is a zero indexed array(2)
- a data structure which stores data of the same type
- the first element is stored at the index zero
what is an embedded system(2)
- a processor built into another device
- designed to perform a specific task
definition of RISC
an integrated circuit with a basic range of machine instructions
one reason why Purchasing Power Parties are used(2)
- to improve accurace when comparing data betwen countries
- PPP compares the cost of living between different countries
RAD(4)
- prototype is created
- evaluated and feedback is used to inform next iteration
- any changes are made
- process is repeated until prototype becomes final product
what is a hash
a result generated by applying an algorithm to a value
another name for variable and its name
memory location with label “…….”
3 evaluation points for monopsonies
- suppliers will have a major buyer improving revenue, long-term investment and profit
- government intervention to protect supplier and its employees(setting limits on price)
- monopsony firm benefit(lower costs)
what is organic growth
- the business gows naturally
- opening new branches
what is the genie coefficient
area between the line of perfect equality and the lorenz curve(divided by the totoal area)
what is absolute poverty
income of < $2.15/day
what is relative poverty
when the income earned < 60% of median income
what are the scores for HDI
- > =0.8 = very high(development)
- 0.7-0.79 = high
- 0.55-0.69 = medium
- < 0.5 = low
what is the only exception for newton raphson, what does it mean
it doesnt wo-rk when the gradient is 0, there is a stationary point at x = 0
why does a one to many to one relationship have to be created(3)
- changes many to many relationships
- it takes the design into a normalised form(3NF)
- reduces data inconsistencies
how does a multi user operating system work(4)
- different usernames and passwords allows different users to log in
- individual settinjg for each user can be stored
- … to personalise user eperience(desktop background and colour)
- access controls can be allocated to each user (to only permission to files that they are allowed to access)
what are the four stages of the spiral model
- identify
- design
- construct
- evaluate
