कम्प्युटर ज्ञान – Computer Knowledge MCQ
कम्प्युटर ज्ञान – IT प्रवेश
Computer Knowledge · IT Entrance – B.Sc. CSIT, BIT & BCA · ३९७ प्रश्न
३९७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कम्प्युटर ज्ञान: 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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An IPv4 address is made up of how many bits?
सही उत्तर: ख) 32
IPv4 addresses are 32 bits long, written as four decimal octets such as 192.168.1.1. IPv6 addresses are 128 bits.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A network that covers a city is called a:
सही उत्तर: घ) MAN
A Metropolitan Area Network spans a city or large campus. A LAN covers a building and a WAN covers countries or continents.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Normalization in a database is mainly done to:
सही उत्तर: ग) Reduce data redundancy and anomalies
Normalization organises tables into normal forms so that data is not unnecessarily repeated and insert/update/delete anomalies are avoided. It has nothing to do with encryption.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In an E-R diagram, an entity set is represented by a:
सही उत्तर: क) Rectangle
Rectangles represent entity sets, ellipses represent attributes, and diamonds represent relationships. Remembering this mapping is a frequent exam point.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which SQL command is used to retrieve data from a table?
सही उत्तर: क) SELECT
SELECT queries and returns rows from one or more tables. INSERT adds new rows and UPDATE modifies existing ones.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a relational database, a primary key:
सही उत्तर: ख) Uniquely identifies each record and cannot be NULL
A primary key must be unique and non-null for every row. A field that refers to the primary key of another table is a foreign key.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The OOP feature meaning 'one name, many forms' is:
सही उत्तर: ग) Polymorphism
Polymorphism lets the same function or operator name behave differently in different contexts, as in function overloading and overriding. Abstraction means showing only essential features.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In object-oriented programming, bundling data and the functions that operate on it into a single unit is called:
सही उत्तर: ग) Encapsulation
Encapsulation wraps data and methods together in a class and supports data hiding. Inheritance is acquiring properties of another class.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The worst-case time complexity of bubble sort is:
सही उत्तर: घ) O(n²)
Bubble sort uses nested passes over the list, giving O(n²) comparisons in the worst case. Merge sort achieves O(n log n).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Binary search can be applied only when the list is:
सही उत्तर: क) Sorted
Binary search repeatedly compares with the middle element and discards half the list, which works only if the list is sorted. Its time complexity is O(log n).
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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