Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Consider the following statements:1. A decode...
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Consider the following statements:
1. A decoder with a data input is called a demultiplexer.
2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.
3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.
4. The Gray code is not a BCD-type code.
Which of the statements given above are not correct?
1. A decoder with a data input is called a demultiplexer.
2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.
3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.
4. The Gray code is not a BCD-type code.
Which of the statements given above are not correct?
- a)1,3 and 4
- b)1 and 3 only
- c)2 and 3 only
- d)2 and 4 only
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements:1. A decoder with a data input is ca...
The correct answer is option C: 2 and 3 only.
Let's analyze each statement to understand why.
1. A decoder with a data input is called a demultiplexer.
- This statement is correct. A decoder is a combinational logic circuit that converts coded inputs into coded outputs. When a single input line is used to select one of the multiple output lines, it is called a demultiplexer.
2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.
- This statement is incorrect. An octal decoder has three inputs, which means it has eight combinations of inputs (2^3 = 8). If the decoder has active-LOW outputs, it will output seven HIGHs and one LOW for each combination of inputs. The number of HIGHs and LOWs are complementary to each other.
3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.
- This statement is incorrect. A hexadecimal decoder is a combinational logic circuit that converts a four-bit input into a ten-line output. It is sometimes called a 4-line-to-16-line decoder because it has four input lines and sixteen output lines. The output lines correspond to the sixteen possible combinations of a four-bit input.
4. The Gray code is not a BCD-type code.
- This statement is correct. The Gray code is a binary numeral system where two successive values differ in only one bit. It is used in various applications, such as minimizing errors in digital communication and reducing the complexity of analog-to-digital converters. On the other hand, BCD (Binary Coded Decimal) is a binary representation of decimal numbers, where each decimal digit is represented by a four-bit binary code. The Gray code and BCD are different encoding schemes.
In conclusion, statements 2 and 3 are incorrect, while statements 1 and 4 are correct. Therefore, the correct answer is option C: 2 and 3 only.
Let's analyze each statement to understand why.
1. A decoder with a data input is called a demultiplexer.
- This statement is correct. A decoder is a combinational logic circuit that converts coded inputs into coded outputs. When a single input line is used to select one of the multiple output lines, it is called a demultiplexer.
2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.
- This statement is incorrect. An octal decoder has three inputs, which means it has eight combinations of inputs (2^3 = 8). If the decoder has active-LOW outputs, it will output seven HIGHs and one LOW for each combination of inputs. The number of HIGHs and LOWs are complementary to each other.
3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.
- This statement is incorrect. A hexadecimal decoder is a combinational logic circuit that converts a four-bit input into a ten-line output. It is sometimes called a 4-line-to-16-line decoder because it has four input lines and sixteen output lines. The output lines correspond to the sixteen possible combinations of a four-bit input.
4. The Gray code is not a BCD-type code.
- This statement is correct. The Gray code is a binary numeral system where two successive values differ in only one bit. It is used in various applications, such as minimizing errors in digital communication and reducing the complexity of analog-to-digital converters. On the other hand, BCD (Binary Coded Decimal) is a binary representation of decimal numbers, where each decimal digit is represented by a four-bit binary code. The Gray code and BCD are different encoding schemes.
In conclusion, statements 2 and 3 are incorrect, while statements 1 and 4 are correct. Therefore, the correct answer is option C: 2 and 3 only.
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Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer?
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Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer?.
Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Consider the following statements:1. A decoder with a data input is called a demultiplexer.2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.4. The Gray code is not a BCD-type code.Which of the statements given above are not correct?a)1,3 and 4b)1 and 3 onlyc)2 and 3 onlyd)2 and 4 onlyCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
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