How will you improve the performance of an application by multi-threading in Java?

In an environment with more than one CPU, we can parallelize the computation tasks on multiple CPUs. This leads to parallel processing of a bigger task that takes lesser time due to multiple threads dividing the work among themselves. One example is that if we have to process 1000 data files and calculate the sum of numbers in each file. If each file takes 5 minutes, then 1000 files will take 5000 minutes for processing.

But by using multi-threading we can process these files in 10 parallel threads. So each thread will take 100 files each. Since now work is happening in 10 parallel threads, the time taken will be around 500 minutes.

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C Program to find factorial of a number using functions.

#include<stdio.h> #include<conio.h> void main() { int a,f; int fact(int); clrscr(); printf(“enter a no: ”); scanf(“%d”,&a); f=fact(a); printf(“factorial= %d”,f); getch(); } int fact(int x) { int fac=1,i; for(i=x;i>=1;i--) fac=fac*i; return(fac); }

AirBnB Infographic Journey to IPO

Full Post at https://techpomelo.com/2020/10/infographics-airbnb-milestone-journey-to-ipo/

Defination of the essential properties of operating systems

Define the essential properties of the following types of operating sys-tems: Batch Interactive Time sharing Real time Network Parallel Distributed Clustered Handheld ANSWERS: a. Batch processing:- Jobs with similar needs are batched together and run through the computer as a group by an operator or automatic job sequencer. Performance is increased by attempting to keep CPU and I/O devices busy at all times through buffering, off-line operation, spooling, and multi-programming. Batch is good for executing large jobs that need little interaction; it can be submitted and picked up later. b. Interactive System:- This system is composed of many short transactions where the results of the next transaction may be unpredictable. Response time needs to be short (seconds) since the user submits and waits for the result. c. Time sharing:- This systems uses CPU scheduling and multipro-gramming to provide econ...

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