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3 years ago

Write a Java method to delete a record from a B-tree of order n.

Computers and Technology

1 answer:

max2010maxim [7]3 years ago

6 0

Answer:

Deleting a record on a B-tree consists of three main events:

- Searching the node where the key to be deleted exists

- Deleting the key

- Balancing the tree if required

Explanation:

q = NULL;

p = tree;

while (p) {

i = nodesearch(p, key);

q = p;

if (i < used(p) -1 && key == k(p,i)) {

found = TRUE;

position = i;

break;

}

p = son(p,i);

}

if (!found)

else if (subtree(p)) {

if (used(p) > ((n-1)/2)+1)

delkey (p, position, key);

else {

replace (p, position, fsucc(p));

p0 r1 p1 r2 p2 r3 ……. pn-1 rn-1 pn

q = &fsucc(p);

qpos = index of fsucc;

if (used(rbrother(p)) > ((n-1)/2)+1)

replace (q, qpos, sonsucc(q));

else

while (q && used(q) < (n-1)/2) {

concatenate(q, brother(q));

q = father(q);

}

else

delkey(p, position, key);

}

You might be interested in

"Write an iterative function iterPower(base, exp) that calculates the exponential baseexp by simply using successive multiplicat

sp2606 [1]

Answer:

I am writing the function using Python. Let me know if you want the program in some other programming language.

def iterPower(base, exp):

baseexp = 1

while exp > 0:

baseexp = baseexp*base

exp= exp - 1

return baseexp

base = 3

exp = 2

print(iterPower(base, exp))

Explanation:

The function name is iterPower which takes two parameters base and exp. base variable here is the number which is being multiplied and this number is multiplied exponential times which is specified in exp variable.
baseexp is a variable that stores the result and then returns the result of successive multiplication.
while loop body keeps executing until the value of exp is greater than 0. So it will keep doing successive multiplication of the base, exp times until value of exp becomes 0.
The baseexp keeps storing the multiplication of the base and exp keeps decrements by 1 at each iteration until it becomes 0 which will break the loop and the result of successive multiplication stored in baseexp will be displayed in the output.
Here we gave the value of 3 to base and 2 to exp and then print(iterPower(base, exp)) statement calls the iterPower function which calculates the exponential of these given values.
Lets see how each iteration works:

1st iteration

baseexp = 1

exp>0 True because exp=2 which is greater than 0

baseexp = baseexp*base

= 1*3 = 3

So baseexp = 3

exp = exp - 1

= 2 - 1 = 1

exp = 1

2nd iteration

baseexp = 3

exp>0 True because exp=1 which is greater than 0

baseexp = baseexp*base

= 3*3 = 9

So baseexp = 9

exp = exp - 1

= 1-1 = 0

exp = 0

Here the loop will break now when it reaches third iteration because value of exp is 0 and the loop condition evaluates to false now.
return baseexp statement will return the value stored in baseexp which is 9
So the output of the above program is 9.

5 0

3 years ago

A company wants to publish Knowledge articles to its Customer Community. The articles should be organized for easy navigation by

olchik [2.2K]

Answer:

Define Topics for each Knowledge article

Explanation:

Knowledge article has been written about the services or products that a company offers. It is the information related to some particular product or service. The information contain the knowledge about products, ingredients, how to use the product etc.

To provide this information to the community members, a consultant recommend that, define topic for each knowledge article. So that, a particular person can find this information by searching through topic name.

5 0

3 years ago

A company wants to use online methods to target more customers. It decides to conduct a market research by collecting the data o

Ronch [10]

Answer:

They could use a CRM

A CRM tool lets you store customer and prospect contact information, identify sales opportunities, record service issues, and manage marketing campaigns, all in one central location — and make information about every customer interaction available to anyone at your company who might need it.

They Could Use PDC

The term “primary data” refers to data you collect yourself, rather than data you gather after another party initially recorded it. Primary data is information obtained directly from the source. You will be the first party to use this exact set of data.

They Could Use Quantitative vs. Qualitative Data

Quantitative data comes in the form of numbers, quantities and values. It describes things in concrete and easily measurable terms. Examples include the number of customers who bought a given product, the rating a customer gave a product out of five stars and the amount of time a visitor spent on your website.

Why Should I Track Users Data:

To ensure it's going smoothly, it's important to keep track of data that directly correlates to the potential success of your business. Key performance and financial metrics can help you address any problems with your business before they occur

8 0

3 years ago

Python coding beginners question

Llana [10]

Answer:

i really don't know

4 0

3 years ago

Read 2 more answers

What special case exists when managing linked lists?

tiny-mole [99]

Explanation:

The special case that exists in linked list when we are managing them is when we are dealing with the first element of the list.

When we create a linked list we create a first node separately.

If we delete or add element in front of the first element we have to carefully handle that case.

Hence the special case is when we are dealing with the first element of the list.

6 0

2 years ago