Register

CIL 2026 | System | Question: 93

• edited by
21 views
1 1 vote

Which operation in Relational Algebra is used to retrieve specific columns from a relation?

  1. Cartesian Product $(*)$
  2. Projection $(\pi)$
  3. Intersection $(\cap)$
  4. Selection $(\sigma)$

     

Please log in or register to answer this question.

Voting & Accepting an answer helps improve the community
← Previous · CIL 2026 | System | ...Next → · CIL 2026 | System | ...
← Previous in category · CIL 2026 | System | ...Next in category → · CIL 2026 | System | ...
Position:
Show:

Related questions

1 1 vote
0 0 answers
27
27 views
Shubham Sharma 2 asked Sep 15
27 views
CIL 2026 | System | Question: 1
What is the initial value of top in an empty stack implemented using an array?$0$$-1$$1$Depends on stack size
0 0 votes
0 0 answers
17
17 views
Shubham Sharma 2 asked Sep 15
17 views
CIL 2026 | System | Question: 2
A banking transaction commits successfully, but a system crash occurs immediately afterward. Which mechanism ensures durability?LockingPartial commitTransaction isolation...
0 0 votes
0 0 answers
20
20 views
Shubham Sharma 2 asked Sep 15
20 views
CIL 2026 | System | Question: 3
Consider a finite state transducer (FST) with $Q=\left\{q_{0}, q_{1}\right\}, \Sigma=\{0,1\}, \Gamma=\{a, b$, $\mathrm{c}\}$, initial state $\mathrm{q}_{0}$, and the foll...
1 1 vote
0 0 answers
22
22 views
Shubham Sharma 2 asked Sep 15
22 views
CIL 2026 | System | Question: 4
In a memory system with fixed-sized partitions, each holding one process (as in IBM OS$/360$ MFT).Which statement is correct?Multiprogramming limited; internal fragmentat...