Difficulty: Easy
Correct Answer: cls
Explanation:
Introduction / Context:Console housekeeping commands improve readability during long troubleshooting sessions. Clearing the display quickly resets the view, aiding focus and reducing confusion from previous output.
Given Data / Assumptions:
Concept / Approach:
CLS (clear screen) is an internal DOS command that clears the text display buffer and repositions the cursor at row 1, column 1 (upper-left). It requires no external executable and works immediately at any standard DOS prompt.
Step-by-Step Solution:
At the prompt, type CLS and press Enter.Observe that prior text disappears; the prompt is at the top-left.Continue with subsequent commands on a clean screen.Use as needed to maintain clarity during diagnostics.Optionally recall previous commands with F3 if needed after clearing.Verification / Alternative check:
Run TYPE on a long file, then run CLS; the screen resets. This confirms function without side effects on files or settings.
Why Other Options Are Wrong:
b: “close” is not a DOS command.
c: “quit” is not the DOS command to clear the screen; some programs use it to exit.
d: “exit” closes the command interpreter (in some environments) rather than clearing the screen.
e: Not applicable because CLS is correct.
Common Pitfalls:
Expecting CLS to clear scrollback in graphical shells—it only clears the visible console buffer.
Final Answer:
cls
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