Q71. What is partitioning and why does it matter for big data?
Partitioning splits a large dataset into smaller physical chunks so queries and maintenance target only relevant data. Common strategies are range (by date), list (by reg...
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Q72. Write an aggregation pipeline that returns the top three products by revenue.
Pipelines pass documents through stages, transforming them step by step. ```js db.orders.aggregate([ { $match: { status: "paid" } }, { $unwind: "$items" }, { $group: { _i...
Q73. What are build artefacts and why version them?
A build artefact is the immutable output of a build: a container image, JAR, binary, or package. Versioning means each artefact has a unique, traceable identifier. Why: -...
Q74. When would you use Azure Functions versus App Service?
Both can host code, but they optimise for different workloads. Azure Functions is serverless and event-driven: - Consumption or Premium plans scale to zero and bill per e...
Q75. Compare write-through, write-behind and write-around caching.
- Write-through: write to the cache and the database in the same operation, synchronously. The cache stays fresh and reads are fast, but writes are slower and every write...
Q76. How do you version a public REST API?
Common strategies: - URI path versioning: `https://api.example.com/v1/orders`. Most visible and easiest to route and cache, at the cost of polluting the URL. - Query para...
Q77. How do you write a custom Tailwind plugin?
A plugin is a function passed to plugins in the config. It receives helpers including addUtilities, addComponents, addBase, addVariant, matchUtilities and theme. ```js co...
Q78. When should you use the OnPush change detection strategy?
With the default strategy Angular checks a component on every change-detection run triggered by any event, timer or XHR inside the zone. ChangeDetectionStrategy.OnPush te...
Q79. Explain the difference between computed, watch and watchEffect.
computed derives a cached value from reactive dependencies. The getter re-evaluates only when a dependency changes and something reads the value, which makes it ideal for...
Q80. What is RAII and why is it central to modern C++?
RAII, Resource Acquisition Is Initialisation, binds a resource's lifetime to an object's lifetime: acquire in the constructor and release in the destructor. Because destr...