Digital Arithmetic Operations and Circuits Questions and Answers

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Q51
Why is a fast-look-ahead carry circuit used in the 7483 4-bit full-adder?
  • A to decrease the cost
  • B to make it smaller
  • C to slow down the circuit
  • D to speed up the circuit
Answer: Option D
Q52
Find the 2's complement of –1101102.
  • A 1101002
  • B 1010102
  • C 0010012
  • D 0010102
Answer: Option D
Q53
What logic function is the sum output of a half-adder?
  • A AND
  • B exclusive-OR
  • C exclusive-NOR
  • D NAND
Answer: Option B
Q54
The binary adder circuit is designed to add ________ binary numbers at the same time.
  • A 2
  • B 4
  • C 6
  • D 8
Answer: Option A
Q55
An ALU is a multipurpose device capable of providing several different logic operations.
  • A TRUE
  • B FALSE
Answer: Option A
Q56
BCD arithmetic is performed using base 10 numbers.
  • A TRUE
  • B FALSE
Answer: Option B
Q57
A full adder has a carry-in.
  • A TRUE
  • B FALSE
Answer: Option A
Q58
Hexadecimal is a base 4 numbering system.
  • A TRUE
  • B FALSE
Answer: Option B
Q59
A binary sum is made up of only 1s and 0s.
  • A TRUE
  • B FALSE
Answer: Option A
Q60
Overflow indicators in ALU circuits indicate when add or subtract operations produce results that are too large to fit into four bits.
  • A TRUE
  • B FALSE
Answer: Option A

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