IT प्रवेश – B.Sc. CSIT, BIT, BCA
IT प्रवेश – B.Sc. CSIT, BIT, BCA
IT Entrance – B.Sc. CSIT, BIT & BCA · २,५८४ प्रश्न
२,५८४ 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 car travels at a constant speed of 20m/s for 10 seconds and then accelerates uniformly to a speed of 30m/s over the next 5 seconds. What is the average velocity of the car during this entire journey? (एक कारले लगातार 20 मिटर/सेकन्डको गतिमा 10 सेकेन्ड र त्यसपछि 5 सेकेन्ड सम्म समानुपातिक गतिमा 30 मिटर/सेकन्ड सम्म त्वरण गर्दछ। यो सम्पूर्ण यात्रा अवधिमा कारको औसत वेग कस्तो हुन्छ?)
सही उत्तर: घ) 30 m/s
The journey is divided into two parts: constant speed and uniform acceleration. The total distance traveled can be calculated using the average velocity over the entire time (15 seconds) and then converted to velocity. Option 3, 27.5 m/s, is derived by correctly calculating the distances in each phase and averaging them.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A block of mass 2 kg slides down an inclined plane with an angle of 30 degrees. If the coefficient of kinetic friction between the block and the plane is 0.2, what is the acceleration of the block down the incline? (भौतिक विज्ञानमा 30 को कोणीय कोण भएको आनलाइन तल मा स्लाइड भइरहेको 2 किग्रा भारोन्मेष को एकBlock को त्वरण के हो?)
सही उत्तर: ख) 1.2 m/s²
The acceleration is calculated using sin(30°) = frictional force / (mg cos(30°)). The most tempting option, 0.6 m/s², results from a misapplication of the cosine term. The correct calculation involves resolving forces and correctly applying Newton's second law.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The perpendicular distance from the point (4, 6) to the line 2x + 3y - 5 = 0 is:
सही उत्तर: क) √13
We use the formula for the distance between a point and a line: d = |Ax₀ + By₀ + C| / √(A² + B²), where (x₀, y₀) is the point and Ax + By + C = 0 is the line. In this case, (4,6) and the line 2x + 3y - 5 = 0. So d = |2(4) + 3(6) - 5| / √(2² + 3²) = |8 + 18 - 5| / √13 = |21| / √13 = 21/√13 ≈ 5. The other options are incorrect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If f(x) = x³ - 2x + 1, then find f'(3).
सही उत्तर: क) 18
First, we find the derivative of f(x): f'(x) = 3x² - 2. Then, we evaluate f'(3): f'(3) = 3(3)² - 2 = 3(9) - 2 = 27 - 2 = 25. The other options do not represent the correct calculation of the derivative at x=3.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Evaluate the limit: lim(x→1) (x² - 1)/(x - 1).
सही उत्तर: क) 1
As x approaches 1, the expression becomes (1-1)/(1-1) = 0/0, which is an indeterminate form. However, we can factor and cancel to get lim(x→1) (x-1)(x+1)/(x-1) = lim(x→1) (x+1) = 2. The other options are incorrect because they do not result from the proper algebraic simplification.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If a random integer between 1 and 100 is selected, what is the probability that it is divisible by both 3 and 7?
सही उत्तर: क) 1/14
A number divisible by both 3 and 7 must be divisible by their least common multiple (LCM). LCM(3,7) = 21. The numbers between 1 and 100 that are divisible by 21 are 21, 42, 63, 84. There are 4 such numbers. So the probability is 4/100 = 1/25. None of the options are equal to 1/25.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a relational database, a primary key: (A) Can contain duplicate values (B) Uniquely identifies each record in a table (C) Is used to index the table for faster retrieval (D) Must be of data type VARCHAR
सही उत्तर: ख) (B) Uniquely identifies each record in a table
A primary key in a relational database is fundamentally designed to ensure that each row (record) within a table is uniquely identified. Option (B) accurately describes this function. Options A, C and D present incorrect characteristics of primary keys.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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HTML stands for: (A) Hyper Text Markup Language (B) High Tech Machine Language (C) Hardware Transfer Method Layer (D) Hyperlink and Text Management Language
सही उत्तर: क) (A) Hyper Text Markup Language
HTML (Hyper Text Markup Language) is the standard markup language for creating web pages. The correct definition is given in option (A). Options B, C, and D are either incorrect acronyms or represent unrelated technologies.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Optical fibre cable transmits data in the form of: (A) Electrical signals (B) Electromagnetic waves (C) Light pulses (D) Sound vibrations
सही उत्तर: ग) (C) Light pulses
Optical fibre cables transmit data using light pulses through a core of glass or plastic. This utilizes the principle of total internal reflection. Options (A), (B), and (D) describe different transmission mediums, while (C) accurately reflects how fiber optics function. This information is consistent with established practices in telecommunications.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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यदि f(x) = (x − 1)(x − 2)(x − 3) हो, तब f'(1) को खोज्नुहोस्।
सही उत्तर: क) -6
f(x) लाई x=1 मा derivative गरेर f'(1) प्राप्त हुन्छ। यसको उत्तर -2 छ, जबकि अन्य विकल्पहरू सही नहुँकन सम्बद्ध देखिन्छन्।
💬 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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