Electronics  Arithmetic Operations and Circuits
Exercise :: Arithmetic Operations and Circuits  Filling the Blanks
1. 
One advantage of using the 2's complement system to represent signed numbers is that you ___________. 
A. 
can perform subtraction by performing addition  B. 
can perform addition by performing subtraction  C. 
can perform division through repeated subtraction  D. 
none of the above 
Answer: Option A
Explanation:

2. 
The 1's complement of 101010_{2} is _________. 
A. 
010110_{2}  B. 
010101_{2}  C. 
110111_{2}  D. 
101011_{2} 
Answer: Option B
Explanation:

3. 
All digital systems that perform arithmetic operations must indicate _______ and ________ for numbers. 
A. 
size, base  B. 
sign, magnitude  C. 
sign, base  D. 
magnitude, base 
Answer: Option B
Explanation:

4. 
The carry propagation delay in 4bit fulladder circuits ____________. 
A. 
is normally not a consideration because the delays are usually in the nanosecond range  B. 
is cumulative for each stage and limits the speed at which arithmetic operations are performed  C. 
decreases in direct ratio to the total number of fulladder stages  D. 
increases in direct ratio to the total number of fulladder stages, but is not a factor in limiting the speed of arithmetic operations 
Answer: Option B
Explanation:

5. 
The 2's complement of 110110_{2} is _________. 
A. 
110100_{2}  B. 
101010_{2}  C. 
001011_{2}  D. 
001010_{2} 
Answer: Option D
Explanation:
