All Notes on BCA

Unit-1
1. Analog system are different from system because:
(a) They use transistors
(b) They handle information in analog form internally
(c) They handle information in digital form
(d) They are slow
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2. Which of the following is the first integrated logic family?
(a) RTL  (b)  DTL   (c)  T T L  (d)  MOS
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3. The worst-case noise margin occur with:
(a) Small fanout  (b)  Full fanout    (c) No fanout   (d)  None of these
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4. Which T T L sub-family has maximum speed?
(a) Standard T T L  (b)  High speed T T L  (c)  Schottky-clamped T T L (d)  Low power T T L
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5. The time required for a gate or inverter to change its state is defined as:
(a) Rise time   (b)  delay time  (c)  propagation  time   (d)  operating speed
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6. Which of the following logic families has the maximum functional capacity?
(a) SSI   (b)  MSI   (c)  LSI   (d)  VLSI
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7. When the maximum clock rate is quoted for a logic family, then it applies to a:
(a) Shift register  (b)  Flip-flop  (c)  Counter   (d)  Single logic gate
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8. FETS are used in linear ZCs to:
(a) Increase device complexity
(b)  Provide large resistances
(c) Increase input resistance 
(d) Both (b)  & (c)
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9. An or gate can be imagined as:
(a) Switches connected  
(b) Switches connected in parallel 
(c) MOS transistors connected in series
(d) None of these
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10.  A multiplexer is also known as:
(a) Coder  (b)  Decoder  (c)  Data selector (d)  Multivibrator
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Unit-2 
11. Which can read data and convert them to a form that a computer can use?
(a) Logic                (b)  Storage    (c)  Control  (d)  Input device
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12. Which of the following terms in the most closely related to main memory?
(a) Nomolatile   (b) Permanent    (c)  Control unit (d)  Temporary
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13. Which of the following terms are used to quickly accept, store and transfer data and instructions that are being used immediately by the CPU?
(a) Registers      (b)  Microprocessor   (c)  ROM chips  (d)  Data buses
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14. Which of the following affects processing power?
(a) Clock speed (b)  Addressing scheme      (c)  Register size (d)  all of the above
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15. The CPU of a computer takes instruction from the memory and executes them. What is this process called?
(a) Load cycle  (b)  Time sequence       (c)  Fetch-execute cycle (d)  clock cycle
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16. Which part of a computer was is used for calculating and comparing?
(a) ALU  (b)  Disk unit         (c) Modem    (d)  All of the above
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17. The  ALU of a computer responds to the commands coming from:
(a) Primary memory (b)  Control section        (c)  External memory (d) Cache memory
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18.  Primary storage is ………………. as compared to secondary storage.
(a) Slow and inexpensive
(b) Fast and inexpensive
(c) Slow and expensive
(d) Fast and expensive
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19. The process of entering data into a storage location:
(a) Adds to the contents of the location
(b) Is known as readout operation
(c) Cause variation in its address number
(d) Is destructive of previous contents
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20. A 32 bit microprocessor has the word length equal to:
(a) 2 bytes  (b)  4 bytes  (c)  8 bytes  (d) 32 bytes
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Unit-3
21.  A built-in number  that identifies a location in storage is known as:
(a) Location  (b) Register  (c) Address  (d) Accumulator
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22. The time required to transmit a message from a terminal to the computer and to receive replay at that terminal is:
(a) Real time   (b) Response time   (c) Access time   (d) All of the above
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23. The basic unit within a computer store capable of holding a single unit of data is:
(a) Register   (b) ALU   (c) Control unit  (d) Store location
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24. The instruction code in machine language or assembled which specifies the basic operation of the CPU is:
(a) Machine code  (b) Instruction code  (c) Op code  (d) All of the above
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25. A secondary storage device with immediate with immediate access to any part of the stored data is:
(a) Direct access device (b) Printer  (c) Keyboard  (d) punched card
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26. A means of storing large amounts of data outside the main memory is:
(a) Accumulator (b) Prime memory (c) Auxiliary store  (d) All of the above
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27. Which bus is used to transmit the data between the memory location and the microprocessor :
(a) Address  (b) Data   (c) Control  (d) All of the above
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28. The time required for the fetching and execution of one simple machine instruction is:
(a) Delay time  (b) CPU cycle  (c) Real time  (d) Seek time
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29. Each model of a computer has a unique:
(a) Assembly language
(b) Machine language
(c) High level language
(d) All of the above
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30. Which of the following are the building boocks of all the circuits in a computer?
(a) Circuit switch (b) Logic gates  (c) Logical operators   (d) Instructions
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Unit-4
31. It is possible to erase information stored in …………… by exposing it to ultraviolet light.
(a) RAM  (b)  ROM  (c)  PROM  (d)  EPROM
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32.  Non-volatility is an important advantage of:
(a) CCD’s  (b)  RAM  (c) Magnetic bubbles (d)  PROM
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33. Which is a fast main memory & slow peripheral memory handled by system software:
(a) Virtual memory (b) Core memory (c)  RAM  (d) Dynamic memory
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34. Which memory system is not used as a mass memory medium?
(a) Semiconductor memory (b) Magnetic tape (c) Magnetic (d) Magnetic drum
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35. A storage device which is used to store data & information external to the main storage is known as :
(a) Buffer  (b)  Backing storage   (c) EPROM (d) Accumulator
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36. For a memory system, the cycle time is:
(a) Same as the access time
(b) Longer  than the access time
(c) Shorter  than the access time  
(d) Submultiples  of the access time  
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37. Which of the following memories must be refresh many times per second?
(a) Static  RAM (b) Dynamic  RAM  (c) EPROM  (d) ROM
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38. The minimum number of MOS transistor required to make a dynamic RAM cell is :
(a) 8   (b)  2    (c)  24   (d)  32
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39. How many RAM chips of size (256 K  X  1 bit) are required to built 1M Byte memory?
(a) 8   (b)  10    (c)  24   (d)  32
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40. A memory that holds micro programs is:
(a) Core memory  (b) ROM   (c) RAM   (d)  Control memory
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Unit-5
41. The data-bus width of a 204 x 8 bits is:
(a) 8   (b)  10    (c)  12   (d)  16
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42. The register which contains the instruction to be executed is called :
(a) Instruction register  
(b) Memory address  register 
(c) Index register
(d) Memory data register
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43. The highest priority in 8085 microprocessor system is :
(a) RST  7.5   (b)  RST  6.5   (c)  INTR  (d)  TRAP
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44. Number of machine cycle required for RET instruction in 8085 microprocessor is :
(a) 1   (b)  2    (c)  3   (d)  5
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45. An instruction used to set the carry flag in a computer can be classified as :
(a) Data transfer (b)  Process control  (c) Logical  (d)  Program control
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46. The function of program counter (PC) holds :
(a) Temporary data 
(b) Address for memory  
(c)  Memory operand 
(d)  Address for instruction
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47. Any instruction should have at least :
(a) 2  operands (b)  1  operands   (c)  3  operands  (d) none of the above
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48. The most relevant addressing mode to write position independent code is:
(a) Direct mode (b) Indirect  mode  (c) Relative mode (d) Indexed mode
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49. In which addressing mode the contents of a register specified in the instruction are first decremented, and then these contents are used as the effective of the operands?
(a) Index addressing (b) Auto increment  (c) Auto decrement  (d) Indirect addressing
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50. The addressing mode used in the instruction PUSH B is :
(a) Direct  (b) Register   (c) Register  indirect (d) Immediate
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SECTION - B
Unit-1

1. Differentiate between Analog and Digital Electronics with example.
OR
2. What do you understand by integrated circuit? Explain LSI and VLSI circuits in detail.



Unit-2

3. What is instruction set? Explain instruction and execution cycle in detail.
OR
4. Explain shift instruction with example.
Unit-3
5. Explain Indirect, Immediate and Relative addressing techniques.
OR
6. Discuss memory buffer register with example.

Unit-4

7. Differentiate between static and dynamic RAM with example.
OR
8. Differentiate between cache and virtual memory with example.

Unit-5

9. Explain auxiliary storage devices in detail.
OR
10. Differentiate between microprocessor and microcontrollers.



THE END