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I will cover the most important topics asked in interviews cs core. Most important topics related to OS/DBMS/OOPS/CN.

CONTENT OF THIS POST :
Most important topics related to OS/DBMS/OOPS/CN.

Important Topic for OS

• Process (Attributes, state, life cycle, PCB) vs Thread.
• Scheduling Algorihtms
• Multiprogramming vs Multiprocessing vs Multitasking vs Multithreading.
• Memory Allocation
  a) Fixed Partioning
  b) Dynamic Partioning
  c) Paging
  d) Segmentation
• Internal and External Fragmentation.
• Memory Allocation Technique.
• Page replacement Algos
• Deadlock
• Critical section problem
• Mutex vs Semaphore

Important Topic for DBMS

• Advantage of DBMS
• All type of Keys
• Normalization
• SQL queries
• Relational Algebra
• Joins
• Trigger, cursor, view
• Dirty read problem
• Conflict serializable vs View serializable.
• ACID properties.
• Indexing | Indexing methods

Important Topic for COMPUTER NETWORK

• Network Topology
• Switch hub router bridge
• Transmission modes
• ipv4 vs ipv6
• subnetting in IP
• OSI layer
• TCP/IP model
• TCP vs UDP
• DNS DHCP FTP HTTP vs HTTPS SMTP SNMP
• Flow vs Error control

Important Topic for OOPS

• Class and Objects.
• Feature/characteristics of OOPs.
• Compile time and Runtime polymorphism.
• Variable scopes.
• static (variables, Functions, Objects).
• Inheritence (Type and Mode)
• Virtual (Functions and Class)
• Abstract class and Interface.
• Friend function and Friend class.
• Call by value, refrence.
• This pointer
• Abstraction
• Exception Handling
• Constructor and Destructor.
• Copy constructor
• copy assignemnt operator
• Refrences variable
• Const (variable, Function, Arguement)
• Overloading (Function, Constructor, Operator)
• Function overriding and Inline function.

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