NTA: UGC NET Exam :Computer Science Mock Test on Computer Arithmetic

This Quiz is posted with the sole aim of guiding the aspirants of NTA: UGC-NET Exam to the path of success. To sharpen the edges of your own intelligence and practice, in a structured and concrete manner to ensure you definite Success in your endeavor and will Pave your way for a successful career in Teaching (or) Research Profession . All the very best...... Knock the door of success......

1. 
    Which of the following does not need extra hardware for DRAM refreshing?
   
   
   
   
   1.  Motorola-6800
   
   
   2.  8085
   
   
   3.  X-130
   
   
   4.  Z-80
   
   
   
   
   
   
   
   
   


2. 
   What is the first OS used in microprocessor?
   
   
   
   
   1.  DOS
   
   
   2.  CPIM
   
   
   3.  Multics
   
   
   4.  Zenix
   
   
   
   
   
   
   
   
   


3. 
   A + B can be implemented by _____.
   
   
   
   
   1.  NOR gate
   
   
   2.  NAND gate
   
   
   3.  AND gate
   
   
   4.  Both (A) & (B)
   
   
   
   
   
   
   
   
   


4. 
   Property of locality of reference may fail,if a program has ______. 
   
   
   
   
   1.  many operands
   
   
   2.  many unconditional jumps
   
   
   3.  many conditional jumps
   
   
   4.  All of the above
   
   
   
   
   
   
   
   
   


5. 
   Bipolar devices are desirable in the fabrication of which of the following components _______.
   
   
   
   
   1.  micro program memory
   
   
   2.  cache memory
   
   
   3.  main memory
   
   
   4.  Both (A) & (B)
   
   
   
   
   
   
   
   
   


6. 
   If A + B = C ( + stands for the XOR operator)
   
   
   
   
   1.  A + B = B
   
   
   2.  A + B +C = 0
   
   
   3.  B + C = A
   
   
   4.  All of the above 
   
   
   
   
   
   
   
   
   


7. 
   What is the binary equivalent of the Gray code 11100 ?
   
   
   
   
   1.  10111
   
   
   2.  10110
   
   
   3.  01001
   
   
   4.  01101
   
   
   
   
   
   
   
   
   


8. 
    How many characters per sec (7 bits + parity) can be transmitted over a 2400-bps line in asynchronous mode?
   
   
   
   
   1.  320
   
   
   2.  624
   
   
   3.  445
   
   
   4.  240
   
   
   
   
   
   
   
   
   


9. 
   A number of system uses 20 as the radix. The excess code that is necessary for its equivalent binary coded representation is ______.
   
   
   
   
   1.  4
   
   
   2.  8
   
   
   3.  6
   
   
   4.  7
   
   
   
   
   
   
   
   
   


10. 
    Which of the following units can be used to measure  the speed of the computer?
    
    
    
    
    1.  MIPS
    
    
    2.  FLOPS
    
    
    3.  BAUD
    
    
    4.  Both (A) & (B)
    
    
    
    
    
    
    
    
    

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