211. An index register in digital computer is register to be used for
A. Performing arithmetic; and logic operations
B. Temporary storage of result
C. Counting number of times a program is executed
D. Address modification purpose

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212. A toggle operation is used
A. without a flip-flop
B. with a flip-flop
C. with a gate circuit
D. with a flip-flop and a gate circuit

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213. The op. amp. is used in
A. A/D converters
B. D/A converters
C. Shift registers
D. None of the above

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214. Read and write capabilities are available in
A. RAM
B. ROM
C. Both RAM and ROM
D. Neither RAM nor ROM

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215. Which of the following is a temporary memory?
A. RAM
B. ROM
C. Both
D. None

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216. Which of the following changes analog voltage to binary data?
A. A/D converter
B. D/A converter
C. Both
D. None of the above

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217. In the circuit shown the output will be
A. sine wave
B. square wave pulse
C. linear
D. non-linear

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