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505. Which of the following is the expansion of EBCDIC

A. Extended bit comparable to digital interface for computer
B. Extended bootable computerised digital infrared calculator
C. Extended binary coded decimal interchange code
D. Extended binary coded decimal information code
✅ The correct answer is option C.

517. Which of the following is true concerning personal computers?

A. They decrease the demand for mainframe computers
B. They have been most successful in the home
C. The electronic spreadsheet has been a primary reason for their popularity
D. Their future is not so bright owning to the improved cost-performance ratio of minis and mainframes
✅ The correct answer is option C.

523. The operating system does all of the following except-

A. Provide a way for the user to interact with the computer.
B. Manage the central processing unit (CPU).
C. Manage memory and storage.
D. Enable users to perform a specific task as document editing.
✅ The correct answer is option D.

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