Csci 512 Final Exam Summer 2011

CSCI 512 Final exam Summer 2011 First Name:Last Name:SIN:Grade True or False: 1. T/F – The underlying substrate in the magnetic disc is non-magnetic. ANS: 2. T/F – Bits of data are written and read using a magnetic coil. ANS: 3. T/F – Any external I/O connected to the computer is termed as a virtual I/O. ANS : 4. T/F The common mode of communication is used IRA codes. ANS : 5. T/F – One of the most important functions of the OS is scheduling processes/tasks. ANS : 6.

T/F – In terms of total control, the OS has the most control of the entire system operation. ANS : 7. T/F – The ALU does not take any action if the output of an operation leads to excess bits. ANS: 8. T/F – An eight bit word can represent up to 256 numbers. ANS: T 9. T/F – Operand data can be logical data or addresses. ANS : 10. T/F – Stacks are visible elements of the system that store program information. ANS : Multiple Choice Questions: 11. Redundancy is a built-in feature here A. Magnetic disksB. RAID C. Serial I/O tapesD.

Optical disks ANS: 12. The megnetoresistive sensor (MR) increases what capability in newer rigid disks? A. Operating frequencyB. Area C. Access timesD. None of the above ANS: 13. Interfaces to memory and I/O devices are made through A. Central SwitchB. Buses C. Data linksD. All of the above ANS : 14. What converts data from electrical to other forms of energy in an I/O module? A. ConvertorB. Transformer C. TransducerD. Arbiter ANS : 15. Which of the following is not a function of the OS A. Program execution B. Error correction C.

Data/Instruction access D. All of the above ANS : 16. What part of the OS stores utilities or frequently accessed functions? A. MemoryB. Registers C. KernelD. None of the above ANS : 17. The output of an ALU operation is stored at A. ALU itselfB. Registers C. CountersD. None of the above ANS: 18. A type of integer representation A. Sign-magnitudeB. Twos complement C. BiasedD. All of the above ANS: 19. After reading the Opcode, the source and destination operand data are stored in A. ALU itselfB. Registers C. CountersD. None of the above ANS : 20.

Symbolic representation of instructions use which type of addressing mode? A. Register addressingB. Memory addressing C. Immediate addressingD. All of the above ANS : Fill up the blanks: 21. For a read or a write the ____________ rotates beneath the head. ANS: 22. ____________ are used between tracks to minimize errors and misalignments. ANS: 23. The I/O module contains __________ functions for communication between processor and external devices. ANS : 24. ____________ and _____________ determine the control and status of the device connected.

ANS : 25. The ______________ are used to implement frequently used functions. ANS : 26. ________________ is the opposite of a batch processing system. ANS : 27. ___________ defines the representation of floating point numbers. ANS: 28. The decimal point in binary and decimal number representations are also called as __________. ANS: 29. Instruction are represented as ___________ bits and is called __________. ANS : 30. The decimal point in binary and decimal number representations are also called as __________. ANS :