IT प्रवेश – B.Sc. CSIT, BIT, BCA
IT प्रवेश – B.Sc. CSIT, BIT, BCA
IT Entrance – B.Sc. CSIT, BIT & BCA · २,५७८ प्रश्न
२,५७८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
IT प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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The value of cos²(θ) + sin²(θ) is:
सही उत्तर: ख) 1
This fundamental trigonometric identity states that cos²(θ) + sin²(θ) = 1. The other options are incorrect because they do not reflect this established mathematical rule.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The derivative of f(x) = x³ + 2x² - 5x + 7 at x = 2 का मान क्या है?
सही उत्तर: ख) 29
To find the derivative, we apply the power rule: f'(x) = 3x² + 4x - 5. Evaluating this at x=2 gives 3(2)² + 4(2) - 5 = 12 + 8 - 5 = 15. Option 21 is incorrect as it is a miscalculation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If log₂ x + log₂ y = 4, and x = 8, then y का मान क्या है?
सही उत्तर: ख) 4
Using logarithm properties: log₂ (x * y) = 4. Substituting x=8 gives log₂ (8*y) = 4, so 8*y = 2⁴ = 16. Therefore, y = 2. Options 4 and 8 are too large given the initial values.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the sum of the first n natural numbers is 165, then n का मान क्या है?
सही उत्तर: घ) 30
The formula for the sum of the first n natural numbers is n(n+1)/2. Setting this equal to 165 and solving for n gives n = 25. The most tempting incorrect option, 15, comes from a simple miscalculation when applying the formula.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 8-bit unsigned integer 1000 in binary is equal to which decimal value? (a) 64 (b) 256 (c) 128 (d) 255
सही उत्तर: घ) 255
Converting binary 1000 to decimal: (1 * 2^3) + (0 * 2^2) + (0 * 2^1) + (0 * 2^0) = 8. Option (a) is the correct answer, because it represents 8 as a hexadecimal number.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In computer architecture, what does ALU stand for? (a) Advanced Logic Unit (b) Arithmetic and Logic Unit (c) Automated Language Understanding (d) Analytical Learning Utility
सही उत्तर: ख) Arithmetic and Logic Unit
ALU stands for Arithmetic and Logic Unit. It is the part of a CPU that performs arithmetic operations (addition, subtraction, etc.) and logical operations (AND, OR, NOT, etc.). Options (a), (c) and (d) are incorrect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The hexadecimal number 7B4 is equal to which decimal number? (a) 2864 (b) 3194 (c) 3046 (d) 514
सही उत्तर: ग) 3046
Hexadecimal uses base-16. Converting 7B4 from hexadecimal to decimal: (7 * 16^2) + (11 * 16^1) + (4 * 16^0) = (7 * 256) + (11 * 16) + 4 = 1792 + 176 + 4 = 1972. Option (a) is incorrect. Option (b) is the correct answer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the output of the following C code? `int i = 5; for (i = 0; i < 5; i++); printf("%d", i);` (a) 5 (b) 0 (c) 1 (d) Error
सही उत्तर: क) 5
The loop increments `i` by 1 in each iteration. However, the increment step is omitted, so the condition `i < 5` will always be true after the initial value of `i = 5`. Therefore, `i` retains its value of 5 and is printed. Options (b), (c) and (d) are incorrect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The decimal number 11001010 is equivalent to which binary number? (a) 101010 (b) 1010010 (c) 110100 (d) 1001010
सही उत्तर: ख) 1010010
Binary numbers are based on powers of 2. Converting 11001010 to binary reveals that it is equivalent to 1010010. Option (a) incorrectly represents the binary value. Options (c) and (d) have incorrect digits.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In computer programming, what does the term 'loop' primarily refer to?
सही उत्तर: ख) B. A sequence of instructions that is repeatedly executed until a specific condition is met.
A loop allows you to repeat a block of code multiple times based on a certain condition or number of iterations, automating repetitive tasks in programming.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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