Difficulty: Easy
Correct Answer: 640 x 480
Explanation:
Introduction / Context:
The Video Graphics Array (VGA) standard defined baseline display capabilities for early PCs and remains a reference point in troubleshooting, compatibility modes, and embedded systems. Knowing the canonical resolution helps when configuring BIOS screens, safe-mode video, and legacy hardware.
Given Data / Assumptions:
Concept / Approach:
Standard VGA provides multiple text and graphics modes. The best-known graphics mode is 640 by 480 pixels at 60 Hz, originally with a 16-color palette in the basic spec. This resolution became the de facto safe mode for boot screens and OS fallbacks because almost all hardware can generate it reliably.
Step-by-Step Solution:
Verification / Alternative check:
Motherboard BIOS and OS “VGA mode” fallbacks consistently use 640 x 480, confirming this as the accepted baseline.
Why Other Options Are Wrong:
648 x 320 and 680 x 440 are nonstandard values. 1024 x 786 is a misspelling/mistake of 1024 x 768 (SVGA), not standard VGA. “None of the above” is unnecessary since 640 x 480 is correct.
Common Pitfalls:
Confusing VGA with SVGA or with DOS game mode 320 x 200 (Mode 13h). Ensure you distinguish “standard VGA” from later extended modes.
Final Answer:
640 x 480
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