Question
Which data structure is most commonly used to
efficiently implement a priority queue?Solution
Heaps (specifically binary heaps) are the most common and efficient data structure for implementing priority queues, allowing O(log n) time complexity for insertion and deletion of elements.
The "Dirty Read" problem occurs when:
Which SQL statement is used to remove all rows from a table without logging individual row deletions?
What is the output of the following pseudo-code?Â
 ```
  count = 0
  for i from 1 to 3:
    for j from 1 t...
What is referential integrity?
Which deadlock prevention scheme allows older transactions to preempt younger ones?
What will be the output of the following Python code:
a=[1,2,3,4,5,6]
print(a[-1],a[-1:],a[:-1])
A software defect that causes a program to produce incorrect output without crashing or displaying an error message is typically classified as a:Â
Which of the following commands are used to put a restriction on the number of rows returned from a query?
Which of the following is a type of database index?
A relation is in 2NF if:
