Desktop Application Desktop Application Performance

Question 1

What is the main cause of a desktop application's UI becoming unresponsive or 'freezing'?

Accepted Answer

A long-running operation blocking the main UI thread

Answer

Too many installed fonts

Answer

High screen resolution

Answer

Too many keyboard shortcuts defined

Question 2

What is the purpose of caching in a desktop application?

Accepted Answer

Store frequently accessed data in fast memory to avoid redundant computation or I/O

Answer

Reduce the number of open threads

Answer

Compress application binaries at runtime

Answer

Synchronize settings across devices

Question 3

What does 'startup time' optimization in a desktop application typically involve?

Accepted Answer

Deferring non-essential initialization until after the main window appears

Answer

Reducing screen resolution on launch

Answer

Disabling all background services

Answer

Pre-warming the GPU

Question 4

Which profiling tool is used on Windows to analyze CPU performance hotspots in desktop applications?

Accepted Answer

Windows Performance Analyzer (WPA) / Visual Studio Profiler

Answer

Process Explorer

Answer

Resource Monitor

Answer

Task Scheduler

Question 5

What is 'virtual scrolling' and why is it used in desktop applications with large data lists?

Accepted Answer

Rendering only visible rows instead of all rows to reduce DOM/widget overhead

Answer

Scrolling that works across multiple monitors

Answer

A scroll animation technique

Answer

Synchronizing scroll position across panes

Question 6

What is the role of the GPU in modern desktop application rendering?

Accepted Answer

Accelerate 2D/3D rendering, compositing, and animations offloaded from the CPU

Answer

Handle network packet processing

Answer

Manage application memory allocation

Answer

Process keyboard and mouse input