Edited, memorised or added to reading list

on 22-Oct-2019 (Tue)

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Flashcard 3842579500300

Question
In linux, for ssh port forwarding, in [...] forwarding you are accessing a service on a remote machine (sometimes through a bastion server) whereas in [...] forwarding you are allowing someone to access your local machine via a remote machine. <----LOOKING FOR 2 DIFFERENT WORDS HERE!
Answer
local, remote


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SSH Tunnel - Local and Remote Port Forwarding Explained With Examples - Trackets Blog
g Made Easy We're building a tool to help businesses reach out to their customers more easily. It's called SendingBee and it's going to be awesome. SSH Tunnel - Local and Remote Port Forwarding <span>Explained With Examples There are two ways to create an SSH tunnel, local and remote port forwarding (there’s also dynamic forwarding, but we won’t cover that here). The best way to understand these is by an e







Flashcard 4462028918028

Question
In AWS IAM, the JSON-defined policies contain an array of Statements, each having the keys: Effect, [...] and Resource.
Answer

Action

^^^ e.g.: To allow a user to rotate their own access key, you have Effect is "Allow" (can either be "Allow" or "Deny"), the Action is anything related to Accesskey (e.g. Create, Delete, etc) and the Resource is just their own IAM user.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iam:*AccessKey*"
            ],
            "Resource": [
                "arn:aws:iam::*:user/${aws:username}"
            ]
        }
    ]
}


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Flashcard 4478462201100

Question
In AWS, you cannot use Security Group rules to restrict a specific IP (SG rules are "Allow" only, not "Deny"), so for this case you should use a VPC [...] [...] [...] [...] instead.
Answer
Network Access Control List (NACL)


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Flashcard 4479414308108

Question
circulatory system - divisions?
Answer
the systemic circulation and the pulmonary circulation


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Flashcard 4479416143116

Question
arteries - main function?
Answer
transport blood under high pressure to the tissues


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Flashcard 4479417978124

Question
arterioles - main function?
Answer
control conduits


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Flashcard 4480253693196

Question
KAPITEL 1 Fourierreihen 1. Definition, Darstellungssatz
Answer
F ourierreihen


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Flashcard 4480254741772

Question
Sei L eine feste positive Zahl. Fourierreihen sind Reihen der Form
Answer
[default - edit me]


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Flashcard 4480258673932



Tags
#has-images
Question
sdasd
Answer
asdasdsadasdasd


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Flashcard 4480262081804

Question
When a table is created in SQL, this is designated on the primary key.
Answer
what is an index?


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Flashcard 4480264178956

Question
just as they can be used in designating a primary key, multiple of these can be used in creating an index.
Answer
what are columns?


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Flashcard 4480266276108

Question
In SQL, this does not necessarily indicate that there is no value for a particular data field.
Answer
what is null?


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Flashcard 4480268373260

Question
After the column description, this can be entered to indicate that null values are not acceptable in SQL.
Answer
what is “not null”?


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Flashcard 4480270470412

Question
An SQL table can be designed without this default.
Answer
what is the null default?


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Flashcard 4480272567564

Question
It can be helpful to employ this in place of null values in a display of data in SQL.
Answer
what is a descriptive name?


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Flashcard 4480274664716

Question
UDF stands for this in SQL.
Answer
what is "User-Defined Function?"


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Flashcard 4480276761868

Question
what SQL statment is used to define a UDF?
Answer
what is CREATE FUNCTION?


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Flashcard 4480278859020

Question
this can increase the number of times SQL must refer to an index.
Answer
what is normalization?


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Flashcard 4480280956172

Question
SQL will conduct data searches based on the primary key index unless this is specified.
Answer
what is another index?


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Flashcard 4480283053324

Question
Text-based descriptive data (such as comments, notes, and descrip- tions) cannot be used in predictive models without first being converted to this.
Answer
what is a simpler form?


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Flashcard 4480285150476

Question
Data scientists accomplish this by searching for patterns in strings of raw data, which can be manipu- lated with a computer program’s string functions.
Answer
what is preparing text-based descriptive data for predictive modeling?


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Flashcard 4480287247628

Question
the number of characters in the string are returned by this function in SQL.
Answer
what is LEN (or LENGTH) ?


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Flashcard 4480289344780

Question
This function is useful if a data scientist needs to know the length of the data field in SQL.
Answer
what is LEN (or LENGTH)?


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Flashcard 4480291441932

Question
to find the index of a string within another string in SQL, this function can be used.
Answer
what is FIELD?


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Flashcard 4480293539084

Question
o combine two different strings into one in SQL, this function is used.
Answer
what is CONCAT?


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Flashcard 4480295636236

Question
this function extracts characters from the left of a string in SQL
Answer
what is LEFT?


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Flashcard 4480297733388

Question
this function extracts characters from the right of a string in SQL.
Answer
what is RIGHT?


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Flashcard 4480299830540

Question
this function extracts a substring of a specific number of characters from a string in SQL.
Answer
what is SUBSTRING?


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Flashcard 4480301927692

Question
Perl stands for this.
Answer
what is Practical Extraction and Report Language?


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Flashcard 4480304024844

Question
Perl consistently uses these to find specific text.
Answer
what are regular expressions?


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Flashcard 4480306121996

Question
This operator in Perl returns a true or false value based on whether it finds a match for the regular expression that fol- lows the operator.
Answer
what is "m//" ?


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Flashcard 4480308219148

Question
Perl needs to know where one of these begins and ends.
Answer
what is a regular expression?


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Flashcard 4480310316300

Question
to indicate both the beginning and end of regular expressions, these are typically used.
Answer
What are slash marks (/) ?


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Flashcard 4480312413452

Question
any pos- sible match will be returned by these regular expressions.
Answer
what are greedy regular expressions?


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Flashcard 4480314510604

Question
Perl’s regular expressions are described as this.
Answer
what is greedy?


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Flashcard 4480316607756

Question
Perl has functions that check for subpatterns. This can be used to find matches
Answer
what is a lookahead?


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Flashcard 4480318704908

Question
to create one regular expres- sion to change part of the expression slightly in each instance in which it applies, this can be used.
Answer
what is a backreference?


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Flashcard 4480320802060

Question
A Perl regular expression can be used to find one out of a list of these.
Answer
what are alternatives?


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Flashcard 4480322899212

Question
this kind of function allows a data scientist to search for the same regular function in every entry in a list. It can be used to return all the matches, or it can be used to simply count the number of matches.
Answer
what is a grep function?


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Flashcard 4480324996364

Question
in Perl, this operator is similar to the m / / / operator except that it can replace each match found.
Answer
what is s/// ?


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Flashcard 4480327093516

Question
in Perl, this function can split a string and return a list of strings.
Answer
what is the Split function?


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Flashcard 4480329190668

Question
these are the default type of regular expression used in R.
Answer
what are extended regular expressions?


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Flashcard 4480331287820

Question
in addition to the default, R can use this type of regular expression.
Answer
what are Perl-like regular expressions?


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Flashcard 4480347540748

Question
In AWS (and computing in general), [...]s are big magnetic disk drives (that you put in computer) that store lots of data but are slow on read/write, whereas [...]s are more compact (non-magnetic) disks that store less data but are fast on read/wirte. <-- LOOKING FOR DIFFERENT ACRONYM FOR EACH OCULSION
Answer
HDD (Hard Disk Drives) / SSD (Solid State Drives)


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Flashcard 4480350424332

Question
In AWS, there are 5 types of EBS storage/disk Volumes you can attach to your EC2 instance: [...] [...] [...] (API code: [...]), Provisioned IOPS SSD (API code: io1), Throughput Optimized HDD (API code: st1), COLD HDD (API code: sc1), and Magnetic (API code: standard)
Answer

General Puporpose SSD (API code: gp2)

^^ General Purpose SSD (gp2), is for most workloads (is default)
^^^ Provisioned IOPS (input/outputs per second) SSDS (io1), is for read/write intensive workloads, e.g. databases
^^^^ Throughput optimized HDD (st1), is for big data and data warehousing, because magnetic HDD disks are for large data sizes but slow read/write
^^^^^ Cold HDD (sc1), is for things like File Servers (less read/writes), even slower than Throughput Optimized HDD
^^^^^^ Magnetic (standard) is the slowest so is for data archiving (if you choose not use glacier)


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Flashcard 4480352521484

Question
In AWS, there are 5 types of EBS storage/disk Volumes you can attach to your EC2 instance: General Puporpose SSD (API code: gp2), [...] [...] [...] (API code: [...] ), Throughput Optimized HDD (API code: st1), COLD HDD (API code: sc1), and Magnetic (API code: standard)
Answer

Provisioned IOPS SSD (API code: io1)

^^ General Purpose SSD (gp2), is for most workloads (is default)
^^^ Provisioned IOPS (input/outputs per second) SSDS (io1), is for read/write intensive workloads, e.g. databases
^^^^ Throughput optimized HDD (st1), is for big data and data warehousing, because magnetic HDD disks are for large data sizes but slow read/write
^^^^^ Cold HDD (sc1), is for things like File Servers (less read/writes), even slower than Throughput Optimized HDD
^^^^^^ Magnetic (standard) is the slowest so is for data archiving (if you choose not use glacier)


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Flashcard 4480354618636

Question
In AWS, there are 5 types of EBS storage/disk Volumes you can attach to your EC2 instance: General Puporpose SSD (API code: gp2), Provisioned IOPS SSD (API code: io1), [...] [...] [...] (API code: [...] ), COLD HDD (API code: sc1), and Magnetic (API code: standard)
Answer

Throughput Optimized HDD (API code: st1)

^^ General Purpose SSD (gp2), is for most workloads (is default)
^^^ Provisioned IOPS (input/outputs per second) SSDS (io1), is for read/write intensive workloads, e.g. databases
^^^^ Throughput optimized HDD (st1), is for big data and data warehousing, because magnetic HDD disks are for large data sizes but slow read/write
^^^^^ Cold HDD (sc1), is for things like File Servers (less read/writes), even slower than Throughput Optimized HDD
^^^^^^ Magnetic (standard) is the slowest so is for data archiving (if you choose not use glacier)


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Flashcard 4480356715788

Question
In AWS, there are 5 types of EBS storage/disk Volumes you can attach to your EC2 instance: General Puporpose SSD (API code: gp2), Provisioned IOPS SSD (API code: io1), Throughput Optimized HDD (API code: st1), [...] [...] (API code: [...]), and Magnetic (API code: standard)
Answer

Cold HDD (API code: sc1)

^^ General Purpose SSD (gp2), is for most workloads (is default)
^^^ Provisioned IOPS (input/outputs per second) SSDS (io1), is for read/write intensive workloads, e.g. databases
^^^^ Throughput optimized HDD (st1), is for big data and data warehousing, because magnetic HDD disks are for large data sizes but slow read/write
^^^^^ Cold HDD (sc1), is for things like File Servers (less read/writes), even slower than Throughput Optimized HDD
^^^^^^ Magnetic (standard) is the slowest so is for data archiving (if you choose not use glacier)


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Flashcard 4480358812940

Question
In AWS, there are 5 types of EBS storage/disk Volumes you can attach to your EC2 instance: General Puporpose SSD (API code: gp2), Provisioned IOPS SSD (API code: io1), Throughput Optimized HDD (API code: st1), COLD HDD (API code: sc1), and [...] (API code: [...] )
Answer

Magnetic (API code: standard)

^^ General Purpose SSD (gp2), is for most workloads (is default)
^^^ Provisioned IOPS (input/outputs per second) SSDS (io1), is for read/write intensive workloads, e.g. databases
^^^^ Throughput optimized HDD (st1), is for big data and data warehousing, because magnetic HDD disks are for large data sizes but slow read/write
^^^^^ Cold HDD (sc1), is for things like File Servers (less read/writes), even slower than Throughput Optimized HDD
^^^^^^ Magnetic (standard) is the slowest so is for data archiving (if you choose not use glacier)


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Flashcard 4480360910092

Question
In AWS, for EBS Volumes, [...] [...] [...] , is the default volume type used for most workloads
Answer
General Purpose SSD (API code: gp2)


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Flashcard 4480363007244

Question
In AWS, you would attached EBS volume of type Provisioned IOPS (Input/Outputs Per Second) SSDS (API code: io1), to your EC2 instance if you are running a [...] on the EC2
Answer

Database

^^where you need fast read/writes


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Flashcard 4480365104396

Question
In AWS, you would attached EBS volume of type Throughput Optimized HDD (API code: st1), to your EC2 instance if you are using the EC2 instance as a [...] [...]
Answer

Data Warehouse

^^because magnetic HDD disks are for large data sizes but slow read/write, but Throughput Optimized HDD is the fastest HDD type


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Flashcard 4480367201548

Question
In AWS, you would attached EBS volume of type Cold HDD (API code: sc1) to your EC2 instance if you are using the EC2 instance as a [...] [...] for example
Answer

File Server

^^^ Becuase you get lots of storage with HDD but you have less read/writes for File Server so slowness of Cold HDD is ok (Throughput Optimized HDD woud be too agresive for this case)


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Flashcard 4480369298700

Question
In AWS, you would choose EBS volume type of Magnetic (standard) to attached to your EC2 instance, if you were using your EC2 instance for [...] [...]
Answer

Data Archiving

^^ since Magnetic is the slowest volume type so is for data archiving (if you choose not use glacier) it is good, since it offers lots of storage space and you do not care about read/write speed


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