1. Which of the following is a non weighted code in which when going from one code to other only one bit is changed ?

Gray

ASCII

Excess-3

BCD

Answer: Gray

Explanation:


2. Which of the following statements is/are correct in regard to excess 3 code ?

It is a BCD code

It is an unweighted code

It is a self-complementing code

All of the above

Answer: All of the above

Explanation:


3. In (0.3125)10 = (x)2, the value of x is ?

0.0101

0.1010

0.1001

0.0010

Answer: 0.0101

Explanation:


4. The most negative number that can be represented by an 8 bit signal 2's complement system is ?

(-127)10

(-128)10

(-64)10

(-256)10

Answer: (-128)10

Explanation:


5. The largest binary number that can be obtained using 16 bits is ?

65536

65535

32768

32767

Answer: 65535

Explanation:


6. The number of digit 1 present in the binary representation of 3 x 512 + 7x64 + 5 x 8 +3 is ?

8

9

10

12

Answer: 9

Explanation:


7. The number of distinct Boolean expressions of 4 variables is ?

16

256

1024

65536

Answer: 65536

Explanation:


8. How many 1's are present in the binary representation of (4 x 4096) + (9 x 256) + (7 x 16) + 5 ?

8

9

10

11

Answer: 10

Explanation:


9. If (2.3)base 4 + (1.2)base 4 = (y)base 4 what is the value of y ?

10.1

10.01

10.2

1.02

Answer: 10.1

Explanation:


10. Given (135)base x + (144)base x = (323)base x What is the value of base x ?

5

3

12

6

Answer: 6

Explanation: