Some Fundamental Topics Helpful For BCC Internship Exam

1. The ALU of a computer responds to the commands coming from- Control section 2. The act of retrieving existing data from memory is called- Read-out Read from Read 3. All modern computer operate on- Data 4. Instructions and memory address are represented by- Binary codes 5. Which of the following code used in present day computing was developed by IBM Corporation? EBCDIC Code 6. What is the latest write-once optical storage media? CD-ROM disk 7. The most important advantage of a video disk is Potential capacity 8. What is the number of read-write heads in the drive for a 9-trac magnetic tape? 9 9. Before a disk drive can access any sector record, a computer program has to provide the record’s disk address. What information does this address specify? Track number Sector number Surface number 10. As compared to diskettes, the hard disks are- More expensive 11. Floppy disks which are made from flexible plastic material are also called? Diskettes 12. Regarding a VDU, Which statement is more correct? It is a peripheral device 13. What is the name of the computer terminal which gives paper printout? Hard copy terminal 14. Dot-matrix is a type of- Printer 15. The two kinds of main memory are: ROM and RAM 16. A kind of serial dot-matrix printer that forms characters with magnetically-charged ink sprayed dots is called Ink-jet printer 17. Which printer is very commonly used for desktop publishing? Laser printer 18. An output device that uses words or messages recorded on a magnetic medium to produce audio response is Voice response unit 19. Which of the following will happen when data is entered into a memory location? It will erase the previous content 20. A storage area used to store data to a compensate for the difference in speed at which the different units can handle data is b. Buffer 21. Which statement is valid about magnetic tape? It is a plastic ribbon 22. The data recording format in most of the modern magnetic tape is 8-bit EBCDIC 23. Which of the following is associated with error detector? Odd parity bit Even parity bit 24. Tape speed is measured in- Inch per second 25. Magnetic disks are the most popular medium for- Direct access Sequential access 26. Storage capacity of magnetic disk depends on- tracks per inch of surface bits per inch of tracks disk pack in disk surface 27. Reading data is performed in magnetic disk by- Read/write leads 28. Access time is- seek time + latency time 29. Seek time is- time to position the head over proper track 30. Latency time is- Time to spin the needed data under head 31. Floppy disks are available in- Single side single density Single side double density 32. Floppy disks typically in diameter 3”, 5.25”,8”........ 33. Hard disk is coated in both side above- Magnetic metallic oxide 34. Binary circuit elements have- Two stable state 35. Which statement is valid? 1KB = 1024 bytes 36. Which statement is valid about computer program? It is understood by a computer It is understood by programmer It is understood user 37. Software in computer- Enhances the capabilities of the hardware machine 38. Which of the following is not computer language? Medium level language 39. Which language is directly understood by the computer without translation program? Machine language 40. Instruction in computer languages consists of OPCODE OPERAND 41. Machine language is- Machine dependent Difficult to program Error prone

Some Important Term:

COM (Computer Output to Microfilm): Microfilm or Microfiche is an output device that stores the output as miniature photographic images. Pulse Code Modulation: Pulse code modulation (PCM) is a digital scheme for transmitting analogdata. The signals in PCM are binary; that is, there are only two possible states, represented by logic 1 (high) and logic 0 (low). This is true no matter how complex the analog waveform happens to be. Using PCM, it is possible to digitize all forms of analog data, including full-motion video, voices, music, telemetry, and virtual reality (VR). Sequential Processing: Sequential processing is a way of doing jobs where each job is done in serial fashion. Some application are sequential by nature such as playing songs or video. You can't jump randomely to any position and play. For example lets take three tasks - calculate total, percentage and division. You should first calculate total and use it in percentage and use the result to determine division. These three tasks are to be done sequentially. Similarly, processing of grades or payroll processing both have to go through sequential processing. Diagnostic Software: A diagnostic program is a program written for the express purpose of locating problems with the software, hardware, or any combination thereof in a system, or a network of systems. Preferably, diagnostic programs provide solutions to the user to solve issues. [Wikipedia]. MemTurbo, Registry Repair Wizard, Disk Cleaner etc are some examples of diagnostic software.</p> Program Counter: Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction. Program counter is 16 bit register which hold the address of next instruction to be executed. Buffer: Buffer is a storage area used to store data to a compensate for the difference in speed at which the different units can handle data. It will collect until the prespecified amount of data to allow processing it as a unit.