Computer Knowledge 4

1. Which is associated with hardware that compensate the difference between CPU speed and peripheral Devices?
A. Mouse.
B. Interface.
C. Keyboard.
D. Monitor.


2. If we convert 100 from binary to decimal, the result will be-
A. 1
B. 2
C. 3
D. 4


3. With the help of which process computer system check that all the devices are functioning properly?
A. Scanning.
B. Formatting.
C. Debugging.
D. Booting.


4. Operating system is a-
A. System Software.
B. Application Software.
C. Hardware.
D. Peripheral Devices.


5. Full form of ROM is-
A. Random Only Memory.
B. Read Only Memory.
C. Random Octacore Memory.
D. Read Overses Memory.


6. System R is an concept of relational database system used in-
A. Chemical labs.
B. real life environment to solve real life problems.
C. Macanical labs to inspect machineries.
D. None of these.



7. What is the rule of Entity Integrity?
A. Primary key can have null value.
B. Primary key can not have null value.
C. Foreign key can not have null value.
D. None of these.



8. Referential Integrity states that-
A. Foreign key must be null value.
B. Forein key can be null value or should be primary key of other relation.
C. Primary key can not have null value.
D. Primary key can have null value.


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