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1. What is Data Science?
Answer:
Data Science is an interdisciplinary field that uses scientific methods, statistics, algorithms, and computing techniques to extract knowledge and insights from data for decision-making.
2. Differentiate between structured and unstructured data.
Answer:
Structured Data
Unstructured Data

Organized in rows and columns
No predefined format

Easy to store in databases
Difficult to analyze

Example: Excel sheets
Example: Images, videos, emails

3. What is data cleaning?
Answer:
Data

RM simple txt file that introd. and explains a SW proj, how to install, use and collab. begin doc before you start proj, at root folder, top level of proj. Markdown lightweight txt to html markup lang. easy to r and w, supported by many tools.

Version Control Systems (VCS) local - ev is saved on personal comp. fast, simple, full control but no collab and risk of data loss; centralized one central server holding the proj. Every dev can r and w, maintains only the current version in their wd; easy

A subroutine is a group of instructions written to perform a specific task. It can be called from different parts of a program using the CALL instruction, and after execution it returns to the main program using the RET instruction.

CALL 2500H ; Call subroutine at address 2500H ...

2500H: INR A ; Increment accumulator RET ; Return to main program

CALL 2500H transfers control to address 2500H.

The instructions at 2500H are executed.

RET returns control to the instruction immediately after CALL.

Unconditional

# what is electronic backing ? what are the some of the retails and wholesale electronic banking services in nepal ? explain 

-> Electronic Banking (E-Banking) is the delivery of banking services through electronic devices and communication networks, allowing customers to perform banking transactions without visiting a bank branch. It enables customers to access their accounts, transfer funds, pay bills, and use other banking services anytime and anywhere using the internet, mobile phones,

Grinding Process, Grinding Wheel & Wheel Wear
Grinding Process:
Grinding is a material removal process in which a rotating wheel with abrasive particles removes material from the workpiece surface. Key elements involved: (1) Grinding wheel, (2) Workpiece, (3) Relative motion between tool and workpiece, (4) Coolant to reduce heat. The grinding wheel rotates at high speed; abrasive particles present on it act as tiny cutting tools, each removing a small amount of material from the workpiece.
Types

Chloroquine phosphate

it is a synthetic 4-aminoquinoline derivative whose chemical structure consists of a quinolinewith a chlorine atom at position 7 and an aliphatic diamine chain at position 4. Clinically, it is used for the prevention and treatment of susceptible malaria infections (caused by Plasmodium vivax, P. malariae, P. ovale, and P. falciparum) and for the treatment of extraintestinal amebiasis. It is also employed as a second-line, disease-modifying antirheumatic drug (DMARD) for rheumatoid

Rights of unpaid Seller
An unpaid seller is a seller who has not received the full prize of the goods sold.
There are some important rights given below:
Right of Lien
The unpaid seller has the right to retain possession of the goods until the buyer pays the price in full. 
Right of stoppage in Transit
If the buyer becomes insolvent, the seller can stop the goods while they are in transit and regain possession of them.
Right of resale
The seller can resell the goods under certain circumstances, especially

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