True or False? Security code is almost always open source! True False

Try making a character (string) variable and a logical variable . Try creating a variable with a "missing" value NA. You can cal

quester [9]

Answer:

The solution code is written in R script.

#string variable
character_str<- "Hello World"
#logical variable
logic <- a > b
#Missing value
myVec <-c(1, 2, 3, NA)
#Use class to check data type
class(character_str)
class(logic)
class(myVec)

Explanation:

A string variable is a variable that hold a string (the letters enclosed within quotation marks) (Line 2)

A logical variable is a variable that hold a logical value (either True or False). The logical value is created by comparing two variables (Line 5).

In R, missing value is an unknown value which is represented by NA symbol (Line 8).

We can use in-built method class  to check for the variable type in R (Line 11-13). For example, the output of class(character_str) is "character"

8 0

2 years ago

Write a program that prompts the user to enter an oligonucleotide sequence, such as TATGAGCCCGTA.

Alexxx [7]

Answer:

Explanation:

The following code is written in Python. It continues looping and asking the user for an oligonucleotide sequence and as long as it is valid it outputs the reverse complement of the sequence. Otherwise it exits the loop

letters = {'A', 'C', 'G', 'T'}

reloop = True

while reloop:

sequence = input("Enter oligonucleotide sequence: ")

for x in sequence:

if x not in letters:

reloop = False;

break

if reloop == False:

break

newSequence = ""

for x in sequence:

if x == 'A':

newSequence += 'T'

elif x == 'T':

newSequence += 'A'

elif x == 'C':

newSequence += 'G'

elif x == 'G':

newSequence += 'C'

print("Reverse Complement: " + newSequence)

7 0

2 years ago

When giving a presentation it is better to ___________

Romashka-Z-Leto [24]

C) Always better to give your information and end on time.

6 0

2 years ago

Select the best answer to the following question.

Fittoniya [83]

Answer:

I think its called "cloud computing"

8 0

2 years ago

For each of the following application areas state whether or not the tree data structure appears to be a good fit for use as a s

Cerrena [4.2K]

Answer:

a) Chess game moves:- Tree data structure is not a good fit.

b) Public transportation paths:- Tree data structure is not a good fit.

c) Relationshi[p among computer files and folders:- Tree data structure is a good fit.

d) Genealogical information:- Tree data structure is a good fit.

e) Parts of books:- Tree data structure is a good fit.

f) Programming language history:- Tree data structure is not a good fit.

g) Mathematical expression:- Tree data structure is a good fit.

Explanation:

a) Chess game moves:- Tree data structure is not a good fit. Since in tree data structure moving backward or sharing the node is not that much easy. Presume, In chess, you have to check any box is empty or not. Here, Graph is the best fit.

b) Public transportation paths:- Tree data structure is not a good fit. whenever shortest path, routes, broadcast come always graph is a good option. Because in the tree you don't know how many time you visit that node

c) Relationshi[p among computer files and folders:- Tree data structure is a good fit. Since they have a predefined route. Go to 'c' drive. Open a particular folder and open a particular file.

d) Genealogical information:- Tree data structure is a good fit. Since genealogical information also has a predefined route. Here, the Graph is not suitable.

e) Parts of books:- Tree data structure is a good fit. Since manages the chapters and topics are not that much complex. You can see any book index which is in a very pretty format.

f) Programming language history:- Tree data structure is not a good fit. To store the history of the programming language we need some unconditional jumps that's why the tree is not suitable.

g) Mathematical expression:- Tree data structure is a good fit. The tree is suitable in some cases. We have an expression tree for postfix, prefix.

5 0

2 years ago