Computer Fundamental Miscellaneous - Study Mode
[#516] Which of the following registers is loaded with the contents of the memory location pointed by the PC?
Correct Answer
(C) Instruction Register
Explanation
Solution: In computing, an instruction register (IR) is the part of a CPU's control unit that holds the instruction currently being executed or decoded.
[#517] Storage on PC allows you to store files until something erases it, but memory loses its contents whenever its _____ is lost
Correct Answer
(C) power
Explanation
Solution: Storage on PC allows you to store files until something erases it, but memory loses its contents whenever its power is lost. The non-volatile memory saves the data when the power is off.
[#518] One byte can be used to encode any integer between '0' and inclusive
Correct Answer
(D) 255
Explanation
Solution: We can count the number of zeros and ones to see how many bits are used to represent 255 in binary i.e. 11111111. Therefore, we have used 8 bits to represent 255 in binary. 1 byte = 8 bits, 2 8 = 256 ranging from 0 - 255.
[#519] Why is the width of the data bus so important to the processing speed of a computer?
Correct Answer
(C) The wider it is, the greater the computer's processing speed
Explanation
Solution: The width and clock rate of the data bus determine the number of bytes per second that it can carry, which is one of the main factors determining the processing power of a computer. Most current processor designs use a 32-bit bus, meaning that 32 bits of data can be transferred at once. A data bus can transfer a data to and from the main memory of a computer, or into or out of the CPU that acts as the device's "engine".
[#520] How many types of storage loops exist in magnetic bubble memory?
Correct Answer
(D) 2
Explanation
Solution: Major-minor loop architecture offers a dramatic improvement in access time. During a write operation data are introduced into the major loop by pulses of current through the hairpin loop of the generator. 1. Major loop 2. Minor loop