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31. Which of the following is an octal number equal to decimal number (896)10?
A. 0061
B. 6001
C. 1006
D. 1600
ANSWER:D
SOLUTION : (896)10 = (1600)8
Step by step solution
Step 1: Divide (896)10 successively by 8 until the quotient is 0:
896/8 = 112, remainder is 0
112/8 = 14, remainder is 0
14/8 = 1, remainder is 6
1/8 = 0, remainder is 1
Step 2: Read from the bottom (MSB) to top (LSB) as 1600.
So, 1600 is the octal equivalent to the decimal number 896 (Answer).
32. Determine the decimal equivalent of (456)8 ______.
A. (203)10
B. (302)10
C. (400)10
D. (402)10
ANSWER: D
SOLUTION:The decimal equivalent of \((456)_{8}\) is \(302\).
33. LSD stands as _______.
A. Long Significant Digit
B. Least Significant Digit
C. Large Significant Digit
D. Longer Significant Decimal
ANSWER:B
SOLUTION:LSD stands for least significant digit. It is the digit that is farthest to the right in a number.
34. Two inputs A and B of NAND gate have 0 output, if ________.
A. A is 0
B. B is 0
C. Both are zero
D. Both are 1
ANSWER:C
SOLUTION:If both inputs are 0. If one input is 0 and the other input is 1.
35. Gate having output 1 only when one of its inputs is 1 is called _________.
A. AND
B. NOT
C. OR
D. NOR
ANSWER:A
SOLUTION:The AND gate gives a 1 only if all the input signals are 1. The Boolean expression for evaluating an AND signal is: Y=A.B. Explanation: An OR gate gives the result as 1 if any one of the inputs is one.
36. Gate is also known as inverter____________.
A. OR
B. NOT
C. XOR
D. NAND
ANSWER: B
SOLUTION:A gate is also known as an inverter if it’s a NOT gate. A NOT gate, or inverter, is a logic gate that implements logical negation, meaning it outputs a bit that’s the opposite of the bit that’s put into it.
37. The NAND gate is AND gate followed by ______.
A. NOT gate
B. OR gate
C. AND gate
D. NOR gate
ANSWER: A
SOLUTION: The NAND (Negated AND) gate is an AND gate followed by a NOT gate.
38. The NOR gate output will be high if the two inputs are______.
A. 00
B. 01
C. 10
D. 11
ANSWER:B
SOLUTION: The output of NOR gate is high when all inputs are low. Explanation: As we see the truth table for NOR gate : When both the input is low (0), then output is high (1).
39. Which of following are known as universal gates?
A. NAND & NOR
B. AND & OR
C. XOR & OR
D. AND
ANSWER: A
SOLUTION:NAND and NOR gates are known as universal gates because they can be used to implement any Boolean function without using any other type of gate.