Connect with fellow learners in the PlacePrep Discord communityㆍ Join now →

R's PlacePrep

Popular drives

TCSNQT (National Qualifier Test)InfosysIRT (InfyTQ Recruitment Test)AccentureCognitive & Technical Assessment

Also hiring

WiproNLTH (National Level Talent Hunt)CognizantGenC Assessment CapgeminiGame-Based Assessment

Browse all 14 companies TCS NQT 2026

Real placement papers from the drives you are actually sitting for

14 companies · 48 papersStart practising

Select your branch

Computer Science & EngineeringBEU previous year papers and solutions Mechanical EngineeringBEU previous year papers and solutions Electrical & Electronics EngineeringBEU previous year papers and solutions

More branches

Civil EngineeringBEU previous year papers and solutions Aeronautical EngineeringBEU previous year papers and solutions

All branches Computer Science

Previous year questions

University papers, sorted by subject and year with worked solutions

BEU Solved PapersOpen the archive

Core CS

Data Structures & AlgorithmsComplexity analysis up to graphs and DP.Operating SystemsProcesses, scheduling, memory and concurrency.Database Management SystemsRelational modelling, transactions and indexing.Computer NetworksFrom wires and radio waves up to the web.

Learn & scale

AI Inference EngineeringQuantization, batching and KV caching in production.System DesignScalable systems from first principles.Context EngineeringDesigning the context that LLMs actually reason over.Docker & KubernetesContainers and orchestration, explained.

All 15 courses Authors

Structured courses that start at zero and end somewhere useful

15 courses · free foreverBrowse courses

Companies PYQ Learn

Computer Networks

Foundations of Networking4

Physical Layer & Signals3

Data Link Layer6

Network Layer & Routing6

IP addresses and the math of subnetting
IP fragmentation, when a packet is too big for the road
How routers find a path across the internet
Flooding, distance vector, and link state routing compared
DHCP and ICMP: the IP layer's helper protocols
NAT, and why we ran out of IP addresses

Transport Layer5

Application Layer & The Web4

Wireless, Security & Performance3

Lessons

Contribute, invite only

Computer Networks

Foundations of Networking4

Physical Layer & Signals3

Data Link Layer6

Network Layer & Routing6

IP addresses and the math of subnetting
IP fragmentation, when a packet is too big for the road
How routers find a path across the internet
Flooding, distance vector, and link state routing compared
DHCP and ICMP: the IP layer's helper protocols
NAT, and why we ran out of IP addresses

Transport Layer5

Application Layer & The Web4

Wireless, Security & Performance3

Learn Computer Networks Network Layer & Routing

Contribute, invite only

How routers find a path across the internet

What a router actually does with every packet, and how routing tables and simple shortest-path math decide which way traffic flows.

9 min readUpdated 2026-09-03computer-networksnetwork-layerroutingrouters