UGC NET CS 2004 Dec-Paper-2
November 7, 2023UGC NET CS 2004 Dec-Paper-2
November 7, 2023UGC NET CS 2004 Dec-Paper-2
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Question 6
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An example of a binary number which is equal to its 2 ’s complement is :
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1100
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1001
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1000
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1111
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Question 6 Explanation:
Option-A: 1100 convert into 2’s complement is
1100
1’s complement: 0011
2’s complement: 1
——–
0100
Option-B: 1001 convert into 2’s complement is
1001
1’s complement: 0110
2’s complement:
1
——–
0111
———
Option-C: 1000 convert into 2’s complement is
1000
1’s complement: 0111
2’s complement:
1
——–
1000
———
Option-D: 1111 convert into 2’s complement is
1111
1’s complement: 0000
2’s complement:
1
——–
0001
———
So, Option-C is correct answer.
1100
1’s complement: 0011
2’s complement: 1
——–
0100
Option-B: 1001 convert into 2’s complement is
1001
1’s complement: 0110
2’s complement:
1
——–
0111
———
Option-C: 1000 convert into 2’s complement is
1000
1’s complement: 0111
2’s complement:
1
——–
1000
———
Option-D: 1111 convert into 2’s complement is
1111
1’s complement: 0000
2’s complement:
1
——–
0001
———
So, Option-C is correct answer.
Correct Answer: C
Question 6 Explanation:
Option-A: 1100 convert into 2’s complement is
1100
1’s complement: 0011
2’s complement: 1
——–
0100
Option-B: 1001 convert into 2’s complement is
1001
1’s complement: 0110
2’s complement:
1
——–
0111
———
Option-C: 1000 convert into 2’s complement is
1000
1’s complement: 0111
2’s complement:
1
——–
1000
———
Option-D: 1111 convert into 2’s complement is
1111
1’s complement: 0000
2’s complement:
1
——–
0001
———
So, Option-C is correct answer.
1100
1’s complement: 0011
2’s complement: 1
——–
0100
Option-B: 1001 convert into 2’s complement is
1001
1’s complement: 0110
2’s complement:
1
——–
0111
———
Option-C: 1000 convert into 2’s complement is
1000
1’s complement: 0111
2’s complement:
1
——–
1000
———
Option-D: 1111 convert into 2’s complement is
1111
1’s complement: 0000
2’s complement:
1
——–
0001
———
So, Option-C is correct answer.