DSSSB TGT CS Mock 02 – Question 101

Question:

What is the 2’s complement representation of the decimal number -27 in an 8-bit register?

एक 8-बिट रजिस्टर में दशमलव संख्या -27 का 2’s कॉम्प्लिमेंट (पूरक) निरूपण क्या होगा?

Options:

  • 11100101
  • 11100100
  • 00011011
  • 11011011
  • 11100101
  • 11100100
  • 00011011
  • 11011011

Correct Answer: a)

Explanation:

1. Positive 27 in 8-bit binary: \(27 = 16 + 8 + 2 + 1 = 00011011_2\).
2. 1’s complement (invert bits): \(11100100_2\).
3. 2’s complement (add 1): \(11100100 + 1 = 11100101_2\) (Option a).

1. +27 का 8-बिट बाइनरी: \(00011011_2\).
2. 1’s पूरक (उलटने पर): \(11100100_2\).
3. 2’s पूरक (+1 जोड़ने पर): \(11100101_2\) (विकल्प a)।

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