त्रिवि IT प्रवेश BIT र BCA प्रवेश तयारी
त्रिवि IT प्रवेश – BIT र BCA प्रवेश
TU BIT & BCA Entrance · TU IT Entrance (B.Sc. CSIT, BIT, BCA)
२,६०७ 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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A uniform rod of length L and mass M is placed on a smooth horizontal surface. What is the net torque about the center of the rod? (भौतिक विज्ञान)
सही उत्तर: क) 0 Nm
Torque (τ) = Force * Distance. Since the rod is in equilibrium, the forces are balanced. The force due to gravity acts downwards at a distance L/2 from the center. Therefore, τ = Mg(L/2). However, as the rod is on a smooth horizontal surface, the net torque about the center of the rod must be zero because there's no rotational force. The other options present calculated torque values based on different distances, leading to incorrect outcomes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A stone is dropped vertically downwards from the top of a building with height 'h'. The velocity just before hitting the ground is v. Taking g = 9.8 m/s², find the relationship between h and v (भौतिक विज्ञान).
सही उत्तर: ख) v = gh
Using the equation of motion: v² = u² + 2as, where 'u' is initial velocity (0), 'a' is acceleration due to gravity (g), and 's' is distance (h). Therefore, v² = 0 + 2gh, implying v = √(2gh). Hence, the relationship between h and v is v = √2gh.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The refractive index of a glass is 1.5. If a light ray enters the glass from air at an angle of incidence of 30 degrees, what will be the angle of refraction? (भौतिक विज्ञान)
सही उत्तर: क) 30 degrees
Snell's Law states n₁sinθ₁ = n₂sinθ₂, where n₁ and n₂ are refractive indices and θ₁ and θ₂ are the angles of incidence and refraction. Here, n₁ = 1 (air), θ₁ = 30°, and n₂ = 1.5. So, sinθ₂ = (1.5 * sin30°) / 1 = 1.5 * 0.5 = 0.75. Therefore, θ₂ = arcsin(0.75) ≈ 48.2 degrees, closest to 48 which is not an option. We can assume there's a slight error in the question provided options.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A light bulb consumes 60 Watts of power when operating at 240 Volts AC. What is the current flowing through the bulb? (भौतिक विज्ञान)
सही उत्तर: ख) 0.30 A
The power (P) is given by P = V * I, where V is voltage and I is current. Rearranging the formula to solve for current: I = P / V. Therefore, I = 60W / 240V = 0.25 A. The other options are incorrect because they do not correctly apply this fundamental electrical relationship.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What does the term 'debugging' mean in software development? (a) Designing a new program. (b) Fixing errors or defects in a program’s code. (c) Optimizing a program for performance. (d) Testing a program to ensure it meets requirements.
सही उत्तर: ख) (b) Fixing errors or defects in a program’s code.
Debugging is the process of identifying and correcting errors (bugs) within a computer program's source code. Option (a) describes software design. Option (c) describes optimization. Option (d) refers to testing.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following best describes the concept of 'recursion' in programming? (a) Using loops to repeat code. (b) A function calling itself within its own definition. (c) Creating multiple instances of a program. (d) Passing data between different functions.
सही उत्तर: ख) (b) A function calling itself within its own definition.
Recursion is a programming technique where a function calls itself repeatedly to solve a problem. This is fundamentally different from loops. Option (a) describes iterative control flow. Option (c) involves multiple processes. Option (d) relates to function arguments.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In computer networking, what does 'IP addressing' refer to? (a) A method of encrypting data packets. (b) The process of assigning unique numerical addresses to devices on a network. (c) A type of wireless communication protocol. (d) The physical cables used to connect computers.
सही उत्तर: ख) (b) The process of assigning unique numerical addresses to devices on a network.
IP addressing (Internet Protocol addressing) is the system used to uniquely identify and locate each device connected to a network. Option (a) describes encryption. Option (c) refers to Wi-Fi. Option (d) deals with cabling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the output of the following C code snippet? `int x = 10; float y = 2.5; int result = x * (int)y; printf("%d", result);` (a) 25 (b) 10 (c) 24 (d) Compilation error
सही उत्तर: घ) (d) Compilation error
The code performs integer multiplication with implicit type conversion. The float `y` (2.5) is cast to an integer during the calculation (`(int)y`). This truncation results in `y` becoming 2 before the multiplication takes place, so `x * 2 = 20`. Therefore, the output is 20.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If f(x) = x³ - 6x² + 9x + 5, find f'(3).
सही उत्तर: क) 12
First, find the derivative of f(x): f'(x) = 3x² - 12x + 9. Then substitute x=3: f'(3) = 3(3)² - 12(3) + 9 = 27 - 36 + 9 = 0. The correct answer is '0'. Options '12', '18', '24' and '30' are incorrect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The area of the triangle formed by the points (0, 0), (1, 1) and (2, 0) is:
सही उत्तर: क) 1
The area of a triangle with vertices at (0, 0), (x₁, y₁) and (x₂, y₂) can be calculated using the formula Area = (1/2)|x₁y₂ - x₂y₁|. In this case, Area = (1/2)|(1)(0) - (2)(1)| = (1/2)|-2| = 1. Option '2' is incorrect, and options '3' and '4' also do not represent the correct area.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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