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ECAT Computer Science Chapter 2 Digital Computer Fundamentals Online Test MCQs With Answers
Question # 1
Pick out the correct definition of buffer.
Choose an answer
Buffer is a hardware device that stores data outside the CPU
Buffer is that portion of the CPU memory which stores program instructions
Buffer is a temporary storage between the CPU memory and a peripheral device
Buffer is a device to convert input data into a computer readable form
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Question # 2
The central processing Unit (CPU) comprises of.
Choose an answer
memory, VDU , and printer
input device , output device and memory
store , arithmetic and logic unit and control unit
software, hardware and power supply unit
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Question # 3
The heart of a digital computer is.
Choose an answer
control unit
memory unit
logic unit
visual display unit
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Question # 4
The operation of arithmetic logic unit (ALU) is directed by.
Choose an answer
the ALU itself
program
control unit
memory unit
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Question # 5
The following register keeps track of the program during execution.
Choose an answer
Address register
Program counter
Data register
Accumulator
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Question # 6
On a linear bus topology cabling can be extended by using following device
Choose an answer
Network Adapter Card
Barrel Connector
Terminator
Modem Card
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Question # 7
At the beginning of the instruction cycle, the contents of the Instruction Register specify.
Choose an answer
Operand for the instruction being executed
Instruction itself
Operand for the instruction to be executed next
None of above
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Question # 8
How many pairs of computers can simultaneously communicate on Ethernet LAN
Choose an answer
1
3
Multiple
4
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Question # 9
Which of the following is an example of volatile memory.
Choose an answer
ROM
RAM
PROM
Hard disk
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Question # 10
The term word in computer terminology refers to.
Choose an answer
bits formed into groups
coded instructions
memory size
language used
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Question # 11
SNA is an example of
Choose an answer
De Jure Protocol
De Facto Protocol
Network organization
None
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Question # 12
A computer can be defined as an electronic device that can: (choose the most precise definition).
Choose an answer
carry out logical functions
carry out arithmetical operations
accept and process data using a set of stored instructions
present information on a VDU
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Question # 13
IEEE 802.3 is
Choose an answer
Device Name
Protocol
Topology
None
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Question # 14
The most common protocol used in WAN is
Choose an answer
Ethernet
X.25
IEEE
ISO
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Question # 15
Computer operations are synchronized by.
Choose an answer
the CPU clock
megabytes
the binary system
E-time
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Question # 16
Ethernet bus topologies used following Ethernet cabling
Choose an answer
Thin Net
Thick Net
Bold Net
a , b
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