UGC net Computer Application solved multiple questions
Computer system and architecture)
1.A technique in which system resources are shared among multiple users
Ans. Multiplexing
2. Memory bank experiencing too much contention from processor
Ans. Thrash
3. Simplified form of the Boolean expression Y=A'BC'D'+ABC'D'+A'BCD'+ABCD' is
Ans. BD'
4. ~(pVq)=~p^~q is a famous law in logic known as
Ans. De Morgan's law
5. A full adder circuit with x, y and z as input bits produces an output the binary sum represented by
Ans.
6. In 80287 is
Ans. Co- processor
7. The maximum size of main memory of a computer is determined by
Ans. Address bus
8. In computer terminology POST stands for
Ans. Power on self test
9. Not an assembler directive
Ans. XCHG
10. In a CDMA system a code for a certain system should have
Ans. Good auto correlation with other codes and Orthogonality to other codes
11. 8251 is a
Ans. USART
12. The basic types of programmable arrays are made of -----------
Ans. AND gates and OR gates
13. An assembler is
Ans. Machine dependent
14. Von Neumann architecture is
Ans. SSID
15. The first modern computer was called ------
Ans. ENIAC
16. If L is a lattice, then for every a and b in L which among the following is correct?
Ans. av(bvc)=(avb)vc
17. p------>q is logically equivalent to
Ans. ~pvq
18. Which one of the following proposition is a tautology?
Ans. pv(p--->q)
19.In the write operation of DMA, the data is transferred
Ans. From I/O to memory
20. A circuit that is used to store one bit of data is
Ans. Flip Flop
21. An n bit microprocessor has
Ans. n bit instruction register
22. Given a 4 input AND gate, how many inputs must be HIGH in order for the output of the logic gate to go HIGH
Ans. All four inputs
23. Which level of RAID uses mirroring to achieve redundancy?
Ans. 1
24. Which IEEE standard is refers to fast Ethernet?
Ans. 802.3u
25. The new generation Intel processor with the IA-64 architecture is called?
Ans. Itanium
26. Which among the following chips is a programmable peripheral interface?
Ans. 82C55A
27. Which among the following is a little -endian machine?
Ans. DEC Alpha
28. IEEE802.11 standard is known as
Ans. CSMA/CA
29. The designation for an electronics standard for connecting devices to your personal computer is
Ans. IEEE1394
30. Flip flop is a basic structure of the device?
Ans. Memory
31. ~qvp is equilvalent to
Ans. q---->p
32. Totem pole output is characteristic of the logic IC family
Ans. TTL
33. A XOR B is equivalent to
Ans. (A+B)-(B bar +A bar )
34. Which among the following flipflops is a modification to the R-S flip-flop that avoids its intermediate state?
Ans. D flip-flop
35. A register organized to allow moving left to right operations is called a
Ans. Shift register
36. De Morgan's theorem states that NAND gate is equivalent to a bubbled ----------- gate
Ans. OR
37. Standard TTL has a multiple emitter input transistor and a --------output
Ans. Totem-pole
38. The Boolean function x'y'+xy+x'y
Ans. x'+y
39 Which of the following logic families highest noise immunity
Ans. HTL
40. What is the 2's complement of -24 in a 16 bit micro computer
Ans. 1111 1111 1110 1000
