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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.

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Database Management Systems

Foundations of DBMS6

Relational Model, Algebra & Calculus6

Integrity Constraints & Normal Forms6

File Organization & Indexing7

Transactions & Concurrency Control9

Transactions and the ACID properties
Schedules and serializability
Conflict serializability and view serializability
Lock-based concurrency control
SQL isolation levels and multiple granularity locking
Timestamp ordering and optimistic concurrency control
Multiversion Concurrency Control (MVCC)
Deadlock handling in databases
Crash recovery and write-ahead logging

Query Processing, Optimization & Distributed DBs5

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Database Management Systems

Foundations of DBMS6

Relational Model, Algebra & Calculus6

Integrity Constraints & Normal Forms6

File Organization & Indexing7

Transactions & Concurrency Control9

Transactions and the ACID properties
Schedules and serializability
Conflict serializability and view serializability
Lock-based concurrency control
SQL isolation levels and multiple granularity locking
Timestamp ordering and optimistic concurrency control
Multiversion Concurrency Control (MVCC)
Deadlock handling in databases
Crash recovery and write-ahead logging

Query Processing, Optimization & Distributed DBs5

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Lock-based concurrency control

Shared and exclusive locks, the two-phase locking protocol and why it guarantees conflict serializability, plus strict 2PL and the anomalies plain locking still allows.

10 min readUpdated 2026-09-04dbmslockingtwo-phase-locking