Technical Questions asked in SanDisk

  1. The pressure coil of dynamometer type wattmeter is
    1. Highly inductive
    2. Highly resistive
    3. Purely resistive
    4. Purely inductive
    Answer:  Option B.
  2. A memory system has a total of 8 memory chips each with 12 address lines and 4 data lines. The total size of the memory system is:
    1. 6 kbyte
    2. 32 kbyte
    3. 48 k byte
    4. 64 kbyte
    Answer: Option  B.
    Size of each memory chip = 212 = 4096 byte = 4 kbyte
    Size of memory system = 8 x4 = 32 kbyte
  1. The main reason for connecting a pulse transformer at the output stage of a thyristor triggering circuit is to
    1. Amplify the power of the triggering pulse
    2. Provide electrical isolation
    3. Reduce the turn on time of the thyristor
    4. Avoid spurious triggering of the thyristor due to noise
    Answer: Option  B.
    For isolation between control and power circuits, the use of a pulse transformer is common. Normally it has two or three windings and it is small, low power and high frequency transformer and the turn ratio is normally 1:1 or 2:1. Hence, pulse transformer is used to provide electrical isolation.
  2. Which of the following is true about the characteristics of abstract data types?
    i)It exports a type.
    ii)It exports a set of operations
    1. True,False
    2. False, True
    3. True, True
    4. False, False
    Answer: Option  C.
  3. Because it contains a description of its own structure, a database is considered to be ________ .
    1. described
    2. metadata compatible
    3. self-describing
    4. an application program
    Answer:  Option  C.
  4. The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T ?
    1. Equi-join
    2. Natural join
    3. Outer join
    4. Cartesian join
    Answer:  Option  D.

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