Computer Science Repeating Questions

1.Firmware is
Ans. Software on hardware
2. Routing performed in which layer of OSI model
(Question from computer networks)
Ans. Routing in network layer
3. The operation which is commutative but not associative.
(Question from Digital electronics)
(GATE and PSC Cat No: 72/2014)
Ans. NAND
Explanation : Every logic gate is commutative (AND,OR, EXOR, EXNOR but not associative)
Associatve are NAND ,NOR)
4. SNMP is prootcol used for
Ans. Network Management
Explanation : SNMP (Simple network management protocol)
5. the average time necessary for the correct sector of a disk to arrive at the read write head is
Ans. Rotational Delay
6.What is the post fix form of the following expression
A+(B*C-(D/E∧F)*G)*H
A)ABC*DEF∧/G*-H*+
Explantion: Refer https://www.youtube.com/watch?v=EE2me3EPMzA
7. Which of the following is the minima super key?
A. Candicate Key
B. Super Key
C. Primary Key
D. None
Ans: Option a Candidate key
Reffer:  https://www.geeksforgeeks.org/dbms-keys-candidate-super-primary-alternate-and-foreign/
8. FPI Stands for
And Frames Per Inch
9. Which of the following logic families is well suited for high speed operation
A. TTL
B. MOS
C. ECL
D. CMOS
Ans. Option D  CMOS( have low power and high speed )

10. The tag used to link one page to another page(Programmer KPSC 2015)

Ans. <a>

11. If x and y are real number then max (X,Y)+ min(X,Y) is equal to (Programmer KPSC 2015)

Ans. X+Y

Explanation 

Take 2 numbers (6, 5)

Max(X,Y)=Max(6,5)

Max=6

Min(X,Y)=Min(6,5)

Min=5

∴Max (X,Y)+ Min(X,Y)=6+5