The DEFAULT command defines a default value for a column when no value is given
<h3>How to determine the command?</h3>
In SQL and other related query languages, a column can be set to have a default value.
This is done using the constraint:
default("some text here")
Hence, the DEFAULT command defines a default value for a column when no value is given
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Answer:
See Explaination
Explanation:
This assume that input is a file and is given on command line. Please note this will ot print lines with frederick as thats what I feel question is asking for
#!/usr/bin/perl -w
open(FILE, $ARGV[0]) or die("Could not open the file $ARGV[0]");
while ($line = <FILE>){
if($line=~/\s+fred\s+/)
{
print $line;
}
}
close(FILE);
Simulation exists the imitation of the operation of a real-world process or system over time.
<h3>What is meant by Simulation?</h3>
A simulation exists an ongoing replica of how a system or process might work in the actual world. Models must be used in simulations; the model reflects the essential traits or behaviors of the chosen system or process, whilst the simulation depicts the model's development over time.
By enabling the testing of various scenarios or process improvements, a simulation is a model that replicates the operation of a current or proposed system. It provides evidence for decision-making. For a more immersive experience, this can be combined with virtual reality technology.
Therefore, the correct answer is option c) Simulation is the imitation of the operation of a real-world process or system over time.
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List and dictionary data structures keep track some of our common information that we need in the following way.
Explanation:
Every programming language has provision for data structures. In the Python programming language, there are a total of 4 inbuilt data structures. These are namely list, tuple, dictionary, and set. Each of them is unique in its own right.
List
- A data structure that stores an ordered collection of items in Python is called a list. In other words, a list holds a sequence of items. You need to put all the items, separated by commas, in square brackets to let Python know that a list has been specified. The general syntax of a list is:
- some_list = [item 1, item 2, item 3,….., item n]
- After creating a list in Python, it is possible to search, add, and remove items from the list.
Dictionary
- It stores data in the form of key-value pairs. The keys defined for a dictionary need to be unique. Though values in a dictionary can be mutable or immutable objects, only immutable objects are allowed for keys.
- A dictionary in Python is defined using key-value pairs, separated by commas, enclosed within curly braces. The key and value are separated using a colon.
- The general syntax of a dictionary is: some_dictionary ={key 1 : value 1, key 2 : value 2, key 3 : value 3,…., key n : value n}
When you are making fun of someone or telling them something that puts them down over & over. - hopes this helps :P