rrrrrrr Flashcards

(44 cards)

1
Q

What is Document Collecting?

A

Collecting a set of documents that specify what the client needs

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2
Q

What are some advantages and disadvantages of Document Collecting?

A

Advantages: Easily shared with others working on the project, low cost
Disadvantages: May contain errors, might be time consuming to go through

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3
Q

What is Documentation?

A

Documents that are produced throughout the stages of the SDLC

Includes design documents, diagrams, requirement specifications and reports

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4
Q

Who are the documents in the interest of?

A

All documents are of interest to the development team

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5
Q

When and why are documents important?

A

Important in the development cycle

Important for customers and end users

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6
Q

How can data be destroyed?

A

Fire
Theft
Disk failure
Hacking

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7
Q

What is a backup?

A

Keeping a copy of software and data so they can be recovered should there be a loss

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8
Q

Why is regular backup crucial for organisations?

A

The data they have is more valuable than anything else

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9
Q

What are periodic backups?

A

Backing up data on a regular basis, can differ from person to person/business to business

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10
Q

Name the 3 main backup methods

A

SSD
The Cloud
USB

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11
Q

What are SSD’s?

A

A storage medium that uses interconnected flash memories to store data without power

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12
Q

What are some disadvantages of SSD’s?

A

Expensive
Less available
Read-write cycle concerns

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12
Q

What are some advantages of SSD’s?

A

Fast read-write time
Energy efficient
Compact

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13
Q

What is The Cloud?

A

Storage medium that can be accessed by anyone with Wi-Fi

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14
Q

What are some advantages of The Cloud?

A

High speed
Reliable
Mobile

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15
Q

What are some disadvantages of The Cloud?

A

Security threats
Downtime
Lower Bandwidth

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16
Q

What is a USB?

A

A small storage medium that can be carried with you

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17
Q

What are some advantages of a USB?

A

Portable
Cheap
Secure

18
Q

What are some disadvantages of a USB?

A

Risk of malware
Not durable
Used to steal information

19
Q

What should every company have, in terms of backups?

A

Every company should have a Backup Policy

20
Q

What is a backup?

A

The process of copying files from main storage to a seperate area

21
Q

Why should the backup files always be tested?

A

So the backup data is ready for use should it be needed for use

22
Q

Why are backups important?

A

If a file gets deleted, the backup file can be collected for use

22
Q

What should the backup policy consider?

A

Where will the backup be stored?

What will the backup be stored on?

How often will the backup occur?

How long will the backup be kept?

23
What should be considered when planning a backup procedure?
Content and type (What will be backed up?) Timing (When will the best time for a backup be?) Frequency (How often will a backup occur?) Backup media (Which media should be used for the backup?) Location (Where will the backup be kept?) Responsibility (Whose responsibility will it be to ensure the backups are kept?)
24
What is a full back up?
Copying all the files on the system to a seperate area
25
What type of business would use a full backup?
Small businesses that don’t have a lot of data
26
What are some advantages of full backups?
Ultimate protection System can be restored at any time Most efficient system (If files haven’t changed, the same files will be getting copied)
27
What are some disadvantages of full backups?
As business grows, the time to back up all the data will grow If the backups get stolen, the thief has access to all the company’s data
28
What is a differential backup?
Only backing up the files that have been changed since the last full backup
29
How does a differential backup compare to a full backup?
Faster than full backups Data getting backed up grows until next full backup More flexible, but unwieldly to do more than once a day
30
What is incremental backup?
Only backing up data that has been changed since the last incremental backup
31
What is recovery?
Taking the backup and copying the data to wherever the data is needed
32
What is the Kernel?
Manages system resources like the CPU, memory, I/O devices Interacts with the hardware Links the user, applications and hardware
33
What are the roles of the Kernel?
Peripheral management- oversees system devices which include I/O devices and storage devices. Ensures data exchanges between devices and applications, handling information flow Memory management (RAM)- Kernel allocates and deallocates memory for processes by keeping track of the sections of memory. Stores active processes in memory, releases memory when processing ends Process management (CPU)- Kernel allocates time to each process. After a process completes its execution, the Kernel starts the next one and assesses it’s state (ready, running, blocked) Interrupt handling (CPU instructions)- Kernel manages task priorities, allowing high-priority tasks to take precedence. Handles system calls (essentially software interrupts)
34
What is the Commutative Law?
Law that switches order of expression A.B = B.A A+B=B+A
35
What is the Idempotent Law?
Law that removes repetition A+A=A A.A+A
36
What is the complement Law?
Law that inverts something equal to the term (cancelled if there are two NOT’s over a term) A.¬A=0 A+¬A=1
37
What is the Identity Law?
Law that simplifies statements down to A, whether a statement is AND’d with a 1 or OR’d with a 0 A.1=A A+0=A
38
What is the Annulment Law?
Law that simplifies statements down to a 0, whether it is AND’d with a 0 or OR’d with a 1 A.0=0 A+1=1
39
What is the Absorption Law?
Law that reduces a bracket to 1 value A.(A+B)=A A+(A.B)=A
40
What is the Association Law?
Law that separates brackets that use the same operator inside and outside the bracket A.(B.C)=A.B.C A+(B+C)=A+B+C
41
What is the Distribution Law?
A law that uses the value outside the bracket and multiplies with bow values inside the brackets, forming two new brackets which are linked by the operator formally inside the bracket A+(B.C)=(A+B).(A+C) A.(B+C)=(A.B)+(A.C)
42
What is De Morgan’s Law?
“Split the line, change the sign” ¬(A.B)=¬A+¬B ¬(A+B)=¬A.¬B