Electronics and Communication Engineering - Digital Electronics

41. 

The number of programmable 8 bit registers of 6800 are

A. 2
B. 3
C. 4
D. 5

Answer: Option A

Explanation:

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42. 

The seven bit Hamming code received is 0010001. If even parity has been used, the correct code is

A. 0010001
B. 1110001
C. 0110001
D. 0011001

Answer: Option D

Explanation:

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43. 

When two 4 bit parallel adders are cascaded we get

A. 4 bit parallel adder
B. 8 bit parallel adder
C. 16 bit parallel adder
D. none of the above

Answer: Option B

Explanation:

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44. 

Consider the following features:

  1. negative operands cannot be used
  2. when immediate operand changes, the program should be reassembled
  3. the program is difficult to read
  4. the size of operand is restricted by word length of the computer
Disadvantages of immediate addressing include

A. 1 and 2
B. 2 and 4
C. 2 and 3
D. 1 and 4

Answer: Option B

Explanation:

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45. 

Which binary addition is incorrect?

A. 1101.1 + 1011.1 = 11001.0
B. 101101 + 1101101 + 1100011
C. 0.0011 + 0.1110 + 1.0001
D. 1100.001 + 1011.011 = 10111.100

Answer: Option D

Explanation:

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