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Digital Electronics

Digital Electronics
Which of the following codes is known as the 8421 code?

 BCD code
 Gray code
 XS-3 code
 ASCII code

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Digital Electronics
For checking the parity of a digital word, it is preferable to use

 AND gates
 NOR gates
 X-OR gates
 NAND gates

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Digital Electronics
Which number system has a base of 16

 Octal
 None
 Decimal
 Hexadecimal

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Digital Electronics
Which of the following memories uses one transistor and one capacitor as basic memory unit

 None
 SRAM
 Both SRAM and DRAM
 DRAM

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Digital Electronics
A bubbled NOR gate is equivalent to a

 AND gate
 X-OR gate
 NOR gate
 NAND gate

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Digital Electronics
Which of these sets of logic gates are designated as universal gates?

 XOR, NOR, NAND.
 OR, NOT, AND.
 NOR, NAND.
 NOR, NAND, XNOR.

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