कम्प्युटर ज्ञान – Computer Knowledge MCQ
कम्प्युटर ज्ञान – IT प्रवेश
Computer Knowledge · IT Entrance – B.Sc. CSIT, BIT & BCA · ३८७ प्रश्न
३८७ 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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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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The term ‘bandwidth’ in computer networking refers to:
सही उत्तर: ख) B. The maximum rate at which data can be transmitted over a connection.
Bandwidth is the capacity of a transmission medium – typically measured in bits per second (bps) – which determines how much data can be transferred within a given timeframe. It’s not about cable size or security measures.
💬 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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Which term describes the process where a computer’s memory is accessed in a sequential order?
सही उत्तर: ख) Random Access Memory (RAM)
RAM utilizes random access, meaning any location can be accessed directly and quickly. DMA allows external devices to access RAM without the CPU's intervention; serial communication deals with data transmission; cache memory is a smaller, faster memory used for frequently accessed data.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What does a ‘loop’ primarily accomplish in programming?
सही उत्तर: ख) To execute a block of code repeatedly
A loop is fundamental to repetitive execution of code blocks. The other options relate to different programming concepts like data types, data storage, and input handling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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