Let's look at the basic things you must know if you are interviewing for a software engineering position: Programming in a language of your choice: You should have a strong hold on at least one programming language. You should be quickly able to understand a reasonably complex piece of code and mentally dry run them. You should be able to code a complex scenario in the said language. Problem solving/ Algorithms: Algorithms in itself is a huge field. You are expected to know about basic algorithms. You will be at a great advantage if you know about basic problem solving approaches. The above 2 topics make up for 50-75% of a software engineering interview process. System Design: This is extremely important if you are an experienced software engineer. You need to be good at: Understanding the requirements of a system Designing scalable, fault-tolerant systems (Horizontal vs. vertical scaling ) Basics of the following: Operating Systems: Threads and Processes, Thread synchronization primitives ( semaphores and mutex), Memory management ( Paging, Swapping ) Databases: Querying a Relational DBMS, Indexing, Primary and Foreign Key constraints, Normalisation, Internal storage Networks: Network Layers, TCP, and UDP, TCP packet structure, Packet routing, Subnetting Web: Cookies, Session management, Caching, Http / Https Where to learn them: Programming in a language of your choice: I will assume you know the basics of programming in at least one language.
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