Computer Science :: All Aptitude Test ::

1.The printed output from a computer is called
A. Copy
B. Soft Copy
C. Hard Copy
D. Copy

2.The most widely used input device is the ____
A. Mouse
B. Keyboard
C. Modem
D. Mouse

3. Information that comes from an external source and is fed into computer software is called ____
A. Input
B. Output
C. Throughput
D. Input

4.Devices that allow you to put information into the computer.
A. Input
B. Output
C. Type
D. Input

5.Which of the following are input devices?
A. Keyboard
B. Mouse
C. Card reader
D. Keyboard

6. Programmable peripheral input-output port is other name for
A. serial input-output port
B. parallel input-output port
C. serial input port
D. serial input-output port

7.Port C of 8255 can function independently as
A. input port
B. output port
C. either input or output ports
D. input port

8.All the functions of the ports of 8255 are achieved by programming the bits of an internal register called
A. data bus control
B. read logic control
C. control word register
D. data bus control

9.The data bus buffer is controlled by
A. control word register
B. read/write control logic
C. data bus
D. control word register

10.The input provided by the microprocessor to the read/write control logic is
A. RESET
B. A1
C. WR(ACTIVE LOW)
D. RESET

11.The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is
A. control word register
B. read/write control logic
C. 3-state bidirectional buffe
D. control word register

12.The port that is used for the generation of handshake lines in mode 1 or mode 2 is
A. port A
B. port B
C. port C Lower
D. port A

13.If A1=0, A0=1 then the input read cycle is performed from
A. port A to data bus
B. port B to data bus
C. port C to data bus
D. port A to data bus

14.The function, „data bus tristated‟ is performed when
A. CS(active low) =1
B. CS(active low) =0
C. CS(active low) =0, RD(active low) =1, WR(active low) =1CS(active low) =1 OR CS(active low) =0, RD(active low) =1, WR(active low) =1
D. CS(active low) =1

15.The pin that clears the control word register of 8255 when enabled is
A. CLEAR
B. SET
C. RESET
D. CLEAR

16.The device that enables the microprocessor to read data from the external devices is
A. printer
B. joystick
C. display
D. printer

17.Which of the following is not valid statement
A. Hard is referred to mean something temporary
B. Hard is used to mean something tangible
C. Soft is used to mean something permanent
D. Hard is referred to mean something temporary

18.Digital devices are
A. Digital Clock
B. Automobile speed meter
C. Clock with a dial and two hands
D. Digital Clock

19.Primary memory stores
A. Data alone
B. Programs alone
C. Results alone
D. Data alone

20.After copying the content how many times can you paste?
A. 1
B. 16
C. 32
D. 1

21.WAN stands for
A. Wap Area Network
B. Wide Area Network
C. Wide Array Net
D. Wap Area Network

22.An error in computer data is called
A. Chip
B. Bug
C. CPU
D. Chip

23.The instructions for starting the computer are house on
A. Random access memory
B. CD-Rom
C. Read only memory chip
D. Random access memory

24.1 nibble equals to
A. 1 bits
B. 2 bits
C. 4 bits
D. 1 bits

25.Perforated paper used as input of output media is known as
A. paper tapes
B. magnetic tape
C. punched papers tape
D. paper tapes

26.The secondary storage devices can only store data but they cannot perform
A. Arithmetic Operation
B. Logic operation
C. Fetch operations
D. Arithmetic Operation

27.Which type of memory can read data but can’t write data?
A. Random only memory
B. Random-access memory
C. Read-only memory
D. Random only memory

28.Which type of memory can speed up computer processing?
A. ROM
B. Cache memory
C. Registers
D. ROM

29.Which one is volatile?
A. DROM
B. Secondary memory
C. RAM
D. DROM

30..Which memory is onboard storage?
A. Random-access memory
B. Cache memory
C. Virtual memory
D. Random-access memory


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