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

Operating Systems

Foundations of Operating Systems3

Processes & Threads4

Inter-Process Communication3

Concurrency & Synchronization4

CPU Scheduling4

I/O & Disk Scheduling3

Memory Management4

Virtual Memory3

Building Your Own OS in C++6

Setting up your toolchain and booting your very first kernel
Building a real screen driver, and setting up the GDT
Handling interrupts, the IDT, and a real keyboard driver
Managing physical memory, and turning on paging
Real multitasking — implementing your own scheduler and context switch
A simple shell, a toy file system, and where to go from here

Lessons

Contribute, invite only

Operating Systems

Foundations of Operating Systems3

Processes & Threads4

Inter-Process Communication3

Concurrency & Synchronization4

CPU Scheduling4

I/O & Disk Scheduling3

Memory Management4

Virtual Memory3

Building Your Own OS in C++6

Setting up your toolchain and booting your very first kernel
Building a real screen driver, and setting up the GDT
Handling interrupts, the IDT, and a real keyboard driver
Managing physical memory, and turning on paging
Real multitasking — implementing your own scheduler and context switch
A simple shell, a toy file system, and where to go from here

Learn Operating Systems Building Your Own OS in C++

Contribute, invite only

Building a real screen driver, and setting up the GDT

Turning one hardcoded print statement into a proper terminal driver, and understanding the segmentation table every x86 kernel must set up.

11 min readUpdated 2026-09-03operating-systemsosdevcppvgagdt