Govt. Exams
ACID stands for Atomicity, Consistency, Isolation, and Durability. Isolation ensures concurrent transactions don't interfere with each other.
The two main types of polymorphism are compile-time (static overloading) and runtime (dynamic overriding). Sequential polymorphism is not a recognized OOP concept.
NullPointerException occurs when trying to call methods or access properties on a null object reference, which has no actual instance allocated in memory.
DFS complexity = O(V + E) = O(10 + 15) = O(25). This includes visiting each vertex once and exploring each edge once.
GET is the HTTP method for safe, idempotent data retrieval without modifying server state. POST creates resources, PUT updates, and DELETE removes resources.
Dynamic Programming is the standard approach for longest common substring problems, building a table of subproblem results with O(n²) time and space complexity.
INNER JOIN returns only rows where there is a match in both tables based on the specified join condition, excluding non-matching rows.
Maximum height occurs in a skewed (linear) tree where height = n - 1 = 7 - 1 = 6. Minimum height would be 2 for a balanced tree.
Agile embraces changing requirements even late in development. Fixed scope with no flexibility contradicts Agile's core principle of adaptability.
In a circular queue, number of elements = (rear - front + 1) = (8 - 3 + 1) = 6 elements.
