Quick Revision

GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Fundamentals → Introduction to Computer 21

How many host addresses does /26 provide?
62
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OSI model has how many layers?
7
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Which OSI layer handles routing?
Layer 3 (Network — IP)
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TLS operates between which OSI layers?
L4 and L7 (between Transport and Application)
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Ethernet frame standard MTU is?
1500 bytes
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Which routing protocol uses hop count metric?
RIP (Routing Information Protocol — max 15 hops)
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OSPF cost is based on?
Interface bandwidth (reference bandwidth / link bandwidth)
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VLAN ID range in 802.1Q is?
1-4094
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802.1X authentication uses?
EAP (Extensible Authentication Protocol) via RADIUS server
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RADIUS provides?
Centralized authentication, authorization, and accounting (AAA)
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WPA3 protects against deauth attacks using?
PMF (Protected Management Frames — 802.11w)
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Captive portal is?
Web page requiring authentication before internet access (hotels, hotspots)
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Cloud bursting allows?
Apps in private cloud to burst to public cloud during peak demand
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Kubernetes HPA scales based on?
CPU/memory utilization or custom metrics
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Kubernetes Cluster Autoscaler?
Automatically adjusts number of nodes based on pod resource requests
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Kubernetes Rolling Update?
Gradually replaces old pods with new — maintains availability
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OCI (Open Container Initiative) defines standards for?
Container image format and runtime specification
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containerd is?
Industry-standard container runtime managing container lifecycle
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CNI in Kubernetes provides?
Network plugin standard for pod networking (Flannel, Calico, Cilium)
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Prometheus is used for?
Metrics collection and alerting with time-series database
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RMSSSB full form is?
Rajasthan Ministerial and Subordinate Service Selection Board
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