Q: __________ is the raw material used as input and __________ is the processed data obtained as output of data processing.
Solution: Data can be assumed as a raw material which, in turns after processing gives the desired output in the form of instructions. Further, a set of ordered and meaningful instructions is known as a program.
Q: Which of the following is not a characteristic of a computer?
Solution: The Computer system has no I.Q. of its own. It does only what it is programmed to do. It cannot take decisions of its own. A computer is diligent because it can work continuously for hours without getting any errors or without getting grumbled. The accuracy of a computer is consistently high and its level of accuracy depends on its design. A computer can perform any task if, it can be broken down into a series of logical steps. Therefore, a computer is versatile.
Q: The part of a processor which contains hardware necessary to perform all the operations required by a computer:
Solution: A processor is a part of the computer which does all the data manipulation and decision making. A processor comprises of: A data path which contains the hardware necessary to perform all the operations. A controller tells the data path what needs to be done. The registers act as intermediate storage for the data.
Q: What does MAR stand for?
Solution: MAR is a type of register which is responsible for the fetch operation. MAR is connected to the address bus and it specifies the address for the read and write operations.
Q: If the control signals are generated by combinational logic, then they are generated by a type of _______________ controlled unit.
Solution: The main task of a control unit is to generate control signals. There are two main types of control units: A hardwired control unit generates control signals by using combinational logic circuits and the Micro programmed control unit generates control signals by using some softwares.
Q: Which is the simplest method of implementing hardwired control unit?
Solution: There are 3 ways of implementing hardwired control unit: A state table is the simplest method in which a number of circuits are designed based on the cells in the table. A delay element method consists of a flowchart drawn for the circuit. A D-flip flop is used as a delay element. A sequence counter method used k-modulo counter as a replacement for k delay elements.
Q: A set of microinstructions for a single machine instruction is called ___________
Solution: For every micro-operation, a set of microinstructions are written which indicate the control signals to be activated. A set of microinstructions is a micro program. The address of the next microinstruction is given by a Micro-program counter.
Q: Micro-program consists of a set of microinstructions which are strings of 0s and 1s.
Solution: The computer understands only binary language. So, the micro-program should have instructions which are in the form of 0s and 1s. Each output line of the micro-program corresponds to one control signal.
Q: A decoder is required in case of a ______________
Solution: There are two types of microinstructions: Horizontal and Vertical. In a horizontal microinstruction, each bit represents a signal to be activated whereas, in case of vertical microinstruction bits are decoded and, the decoder then produces signals.
Q: The part of a processor which contains hardware necessary to perform all the operations required by a computer:
Solution: A processor is a part of the computer which does all the data manipulation and decision making. A processor comprises of: A data path which contains the hardware necessary to perform all the operations. A controller tells the data path what needs to be done. The registers act as intermediate storage for the data.
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