YARN manages cluster resources through Resource Manager. Its main functions are? (Multiple choice)

Question

Options

• ACluster resource scheduling
• BApplication Management
• CLog management
• DNone of the above statements are true

• A
  75% (30)
• C
  18% (7)
• D
  8% (3)

Explanation

YARN's Resource Manager serves two core functions: cluster resource scheduling (A) - tracking available CPU, memory, and other resources across nodes and allocating them to applications - and application management (B) - accepting job submissions, launching ApplicationMasters, and tracking application lifecycles. These two responsibilities are the fundamental reason the Resource Manager exists as a component separate from the NodeManagers.

C (Log management) is wrong because log aggregation is handled by the NodeManager and the YARN Timeline Server/log aggregation service, not the Resource Manager itself. D is wrong by elimination since A and B are both correct.

Memory tip: Think of the Resource Manager as a hotel manager - it handles room inventory (cluster resources = A) and guest check-in/check-out (application lifecycle = B), but it doesn't clean the rooms (log management = the housekeeping staff/NodeManagers).

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