Digital Electronics  Digital Arithmetic Operations and Circuits
Exercise :: Digital Arithmetic Operations and Circuits  General Questions
11. 
The most commonly used system for representing signed binary numbers is the: 
A. 
2'scomplement system.  B. 
1'scomplement system.  C. 
10'scomplement system.  D. 
signmagnitude system. 
Answer: Option A
Explanation:

12. 
What is the major difference between halfadders and fulladders? 
A. 
Nothing basically; fulladders are made up of two halfadders.  B. 
Full adders can handle doubledigit numbers.  C. 
Full adders have a carry input capability.  D. 
Half adders can handle only singledigit numbers. 
Answer: Option C
Explanation:

13. 
The decimal value for E_{16} is: 
A. 
12_{10}  B. 
13_{10}  C. 
14_{10}  D. 
15_{10} 
Answer: Option C
Explanation:

14. 
Fastlookahead carry circuits found in most 4bit fulladder circuits: 
A. 
determine sign and magnitude  B. 
reduce propagation delay  C. 
add a 1 to complemented inputs  D. 
increase ripple delay 
Answer: Option B
Explanation:

15. 
Add the following hex numbers: 0110_{16} + 10010_{16} 
A. 
10120_{16}  B. 
10020_{16}  C. 
11120_{16}  D. 
00120_{16} 
Answer: Option A
Explanation:
