June 2017 Flashcards
Why is Harvard preferenced to von Neumann
Instructions and data is accessed simultaneously.
Bottleneck
Explain thew difference between symmetric and asymmetric cipher system
Symmetric the same key nis used to encrypt and decrypt
Asymmetric different keys for encryption and decryption.
General purpose of a d TYPE FLIP FLOP?
Used to store state used as a memory unit.
State what the other input to a Dtype flip flop is and what it is used for
Synchronise operation of a group of flip flops.
What’s the purpose of the operand part of an instruction and explain how the addressing mode is related to this
Is a value that will be used by an operation.
The addressing mode shows how the values in the operand should be interpreted.
Explain what the assembly language program in figure 5 does?
Checks if value stored in memory location 101 is five time the value stored in memory location 100.
Ads of HLL?
PORTABLE
Easier to understand / maintain and debug
DISADS of HLL?
Assembly may execute more quickly
Assembly may use less memory
How was it possible for data to be collected?
WiFi signals can travel outside of property over a wide area.
Steps to prevent
Use a protocol that encrypts data transmissions.
Use cabled network instead of WiFi .
Legal and ethical issues.
Legal, is it legal to intercept data if people freely choose to transmit it wirelessly.
Was the data just collected or was there an intention to process it as well?
Legally data protection
Explain why storing the owner details separately would improve the design of the database?
Minimise data duplication and a person may own more than one car meaning a person may bring different cars to the garage.
Write SQL commands requires to record the amount of time that he took for the job
UPDATE job
SET job duration=“1:30”
WHERE JobId =206
Write an SQL Query to produce the list.
SELECT PartID Description ,process quantity used
From part , partusedforjob
Where jobid=93
And partusedforjob.partid= part.partid
Order by partid
