डाटाबेस र DBMS – Database & DBMS MCQ
डाटाबेस र DBMS – कम्प्युटर र IT
Database & DBMS · Computer & IT (Technical) · ५६३ प्रश्न
५६३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
डाटाबेस र DBMS: 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 backup that copies only the data changed since the last full backup (regardless of any other backups in between) is a:
सही उत्तर: ग) Differential backup
Differential backups grow until the next full backup; incremental backups copy only changes since the most recent backup of any type.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In SQL, granting a privilege WITH GRANT OPTION means that the receiving user:
सही उत्तर: ख) Can pass the same privilege on to other users
For example GRANT SELECT ON emp TO ram WITH GRANT OPTION lets ram grant SELECT on emp to others.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Discovering hidden patterns, such as items often bought together, from large volumes of data is called:
सही उत्तर: क) Data mining
Data mining applies techniques like association rules, clustering and classification to find useful patterns.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In OLAP, moving from yearly sales figures down to monthly or daily figures is called:
सही उत्तर: घ) Drill-down
Drill-down moves to more detailed data along a dimension hierarchy; roll-up aggregates to a higher level.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a snowflake schema, unlike a star schema:
सही उत्तर: ग) Dimension tables are normalized into further related tables
Snowflaking splits dimensions into sub-dimensions, reducing redundancy at the cost of extra joins.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A small, subject-specific subset of a data warehouse, designed for one department such as sales, is a:
सही उत्तर: ख) Data mart
A data mart focuses on a single business area and is smaller and simpler than the enterprise data warehouse.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In data warehousing, the process of extracting data from sources, converting it to a consistent format and loading it into the warehouse is called:
सही उत्तर: क) ETL
ETL stands for Extract, Transform and Load.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Splitting a large database horizontally across many servers, each holding a portion of the data, to scale out is called:
सही उत्तर: घ) Sharding
Sharding distributes rows among servers by a shard key so that load and storage are spread out.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Many NoSQL systems follow the BASE model instead of ACID. In BASE, 'E' stands for:
सही उत्तर: ग) Eventual consistency
BASE means Basically Available, Soft state, Eventually consistent: replicas may differ briefly but converge over time.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Apache Cassandra is an example of which type of NoSQL database?
सही उत्तर: ख) Wide-column (column-family) store
Cassandra organises data into column families across many nodes and is designed for high write throughput and availability.
💬 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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