26. The operation of a digital computer is based on _____ principle.

A. counting
B. measuring
C. electronic
D. logical
E. None of the above

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27. Which of the following Indian companies designs and manufactures super- computers?

A. C-DOT
B. C-DAC
C. CMC
D. All of the above
E. None of the above

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28. Which of the following memories needs refresh?

A. SRAM
B. DRAM
C. ROM
D. All of the above
E. None of the above

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29. Which of the following is not a sequence storage device?

A. Magnetic disk
B. Magnetic tape
C. Paper tape
D. All of the above
E. None of the above

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30. The computers that we use are digital whereas we live in an analog world which means that we have to translate analog data into digital data. What is the name of the circuit which helps us in this conversion?

A. D/A converter
B. A/D converter
C. Voice recognition
D. Adapter
E. None of the above

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