Digital Computer Electronics - Section 1 (2)

9.

Conversion of decimal number 13₁₀ to it's octal number equivalent is

A.	15 8
B.	17 8
C.	13 8
D.	11 8
E.	None of the above

Answer: Option A

Explanation:

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10.

An inverter is also called a _____ gate.

A.	NOT
B.	OR
C.	AND
D.	NAND
E.	None of the above

Answer: Option A

Explanation:

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11.

How many bits are required to encode all twenty six letters ten symbols, and ten numerals?

A.	5
B.	6
C.	2
D.	3
E.	None of the above

Answer: Option B

Explanation:

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12.

Addition of 10₂ and 11₂ is

A.	100 2
B.	101 2
C.	111 2
D.	110 2
E.	None of the above

Answer: Option B

Explanation:

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13.

De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.

A.	AND
B.	XAND
C.	XOR
D.	NOR
E.	None of the above

Answer: Option A

Explanation:

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14.

The simplified form of the Boolean expression (X + Y + XY)(X + Z) is

A.	X + Y + Z
B.	XY + YZ
C.	X + YZ
D.	XZ + Y
E.	None of the above

Answer: Option C

Explanation:

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15.

A bus is a group of _____ carrying digital signals.

A.	wires
B.	gates
C.	transistors
D.	registers
E.	None of the above

Answer: Option A

Explanation:

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16.

What logic function is obtained by adding an inverter to the inputs of an AND gate?

A.	OR
B.	NAND
C.	XOR
D.	NOR
E.	None of the above

Answer: Option D

Explanation:

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