Question 86Asked in Bihar STET 2025 Paper II Computer Science, 7 Nov 2025, Shift 1 (9:00 AM)

Let u=’1101’, v=’0001’, then uv=11010001 and vu= 00011101.Using the given informationU = '1101', v = '0001', फिर UV = 11010001 और vu = 00011101. दी गई जानकारी का उपयोग

Let u=’1101’, v=’0001’, then uv=11010001 and vu= 00011101.Using the given information what is the identity element for the string?
U = '1101', v = '0001', फिर UV = 11010001 और vu = 00011101. दी गई जानकारी का उपयोग करना स्ट्रिंग के लिए पहचान तत्व क्या है?
  1. Au-1u-1
  2. Bv-1v-1
  3. Cu-1v-1u-1v-1
  4. Dεε
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Correct answer: (D) εε

Explanation

Under concatenation, the empty string ε is the identity element: uε = εu = u for every string u.Concatenation के अंतर्गत खाली स्ट्रिंग ε तत्समक (identity) तत्व है: हर स्ट्रिंग u के लिए uε = εu = u।

From Bihar STET 2025 Paper II Computer Science PYQ, 7 Nov 2025, Shift 1 (9:00 AM)

This is question 86 of Bihar STET 2025 Paper II Computer Science PYQ, 7 Nov 2025, Shift 1 (9:00 AM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.