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MCQs

Total Questions : 88 | Page 1 of 9 pages
Question 1.  For a 4-bit parallel adder, if the carry-in is connected to a logical HIGH, the result is:
  1.    the same as if the carry-in is tied LOW since the least significant carry-in is ignored.
  2.    that carry-out will always be HIGH.
  3.    a one will be added to the final result.
  4.    the carry-out is ignored.
 Discuss Question
Answer: Option C. -> a one will be added to the final result.
Question 2.  Solving –11 + (–2) will yield which two's-complement answer?
  1.    1110 1101
  2.    1111 1001
  3.    1111 0011
  4.    1110 1001
 Discuss Question
Answer: Option C. -> 1111 0011
Question 3.  Perform subtraction on each of the following binary numbers by taking the two's-complement of the number being subtracted and then adding it to the first number.
01001 01100
00011 00111
  1.    01100 10011
  2.    00110 00101
  3.    10110 10101
  4.    00111 00100
 Discuss Question
Answer: Option B. -> 00110 00101
Question 4.  
Multiply the following binary numbers.
1010 1011 1001
×0011 ×0111 ×1010
  1.    0001 1110 0100 1101 0101 1011
  2.    0001 1110 0100 1100 0101 1010
  3.    0001 1110 0100 1101 0101 1010
  4.    0001 1101 0100 1101 0101 1010
 Discuss Question
Answer: Option C. -> 0001 1110 0100 1101 0101 1010
Question 5.  What is the first thing you will need if you are going to use a macrofunction?
  1.    A complicated design project
  2.    An experienced design engineer
  3.    Good documentation
  4.    Experience in HDL
 Discuss Question
Answer: Option C. -> Good documentation
Question 6.  Add the following BCD numbers.
0110 0111 1001
0101 1000 1000
  1.    0000 1011 0000 1111 0001 0001
  2.    0001 0001 0001 0101 0001 0001
  3.    0000 1011 0000 1111 0001 0111
  4.    0001 0001 0001 0101 0001 0111
 Discuss Question
Answer: Option D. -> 0001 0001 0001 0101 0001 0111
Question 7.  
Add the following hexadecimal numbers.
3C 14 3B
+25 +28 +DC
  1.    60 3C 116
  2.    62 3C 118
  3.    61 3C 117
  4.    61 3D 117
 Discuss Question
Answer: Option C. -> 61 3C 117
Question 8.  What are constants in VHDL code?
  1.    Fixed numbers represented by a name
  2.    Fixed variables used in functions
  3.    Fixed number types
  4.    Constants do not exist in VHDL code.
 Discuss Question
Answer: Option A. -> Fixed numbers represented by a name
Question 9. . The 2's-complement system is to be used to add the signed binary numbers 11110010 and 11110011. Determine, in decimal, the sign and value of each number and their sum.
  1.    –113 and –114, –227
  2.    –14 and –13, –27
  3.    –11 and –16, –27
  4.    –27 and –13, –40
 Discuss Question
Answer: Option B. -> –14 and –13, –27
Question 10.  Solve this BCD problem: 0100 + 0110 =
  1.    00010000BCD
  2.    00010111BCD
  3.    00001011BCD
  4.    00010011BCD
 Discuss Question
Answer: Option A. -> 00010000BCD

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