Computer Concepts Module 3 Practice Exam 2026 – Complete Study Resource

When a computer is slow, a common bottleneck is not having enough memory to hold the programs and data you’re actively using. RAM is the fast, working memory the CPU uses to access data quickly. If you don’t have enough RAM, the operating system starts moving data to much slower storage ( paging ), which makes everything feel sluggish as it waits for data to be swapped back in. Installing additional RAM increases the amount of fast memory available, reducing or eliminating this swapping and letting programs load and run more smoothly. The other options don’t tackle this memory bottleneck: lowering the display brightness saves a bit of power but doesn’t significantly boost performance; antivirus software can consume resources and sometimes slow things down during scans; and making sure the AC adapter is connected helps with consistent power but isn’t a direct fix for general slow performance.