Which of the following storage devices can store maximum amount of data?
Answer: B
Correct answer: Hard Disk
Of the four, the hard disk holds by far the most - hundreds of gigabytes to many terabytes, against 1.44 MB for a floppy and about 700 MB for a CD. It also has the advantage of being rewritable and fast.
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One millisecond is
Answer: C
Correct answer: 1000th of a seconds
Milli- means one thousandth, so a millisecond is \(10^{-3}\) seconds. The scale continues: microsecond \(10^{-6}\), nanosecond \(10^{-9}\), picosecond \(10^{-12}\) - the units in which memory and processor speeds are quoted.
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Which of the following was a special purpose computer?
Answer: A
Correct answer: ABC
The Atanasoff-Berry Computer was built to solve one particular kind of problem - systems of simultaneous linear equations - so it was a special purpose machine, and it was not programmable. ENIAC and EDVAC were general purpose.
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CD-ROM is a
Answer: D
Correct answer: None of above
A CD-ROM is an optical medium: data is read by a laser detecting pits burned into a reflective layer. It is neither semiconductor memory nor magnetic, so none of the three categories offered fits.
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A set of information that defines the status of resources allocated to a process is
Answer: D
Correct answer: Process description
The process description (or process control block) is the operating system’s record of a process: its state, its program counter and registers, its memory allocation, and the files and devices assigned to it. It is what the system saves and restores at a context switch.
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John Napier invented Logarithm in
Answer: A
Correct answer: 1614
John Napier published his description of logarithms in 1614, in Mirifici Logarithmorum Canonis Descriptio. By turning multiplication into addition they transformed practical calculation, and they are the principle the slide rule works on. His rods, the bones, followed in 1617.
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Whereas a computer mouse moves over the table surface, the trackball is
Answer: A
Correct answer: Stationary
A trackball is a mouse turned upside down: the ball is on top and the body stays still on the desk, the user rolling the ball with fingers or thumb. It needs no clear space to move in, which is why it was used on early laptops and is still used in confined spaces.
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Integrated circuits (ICs) are related to which generation of computers?
Answer: C
Correct answer: Third generation
Integrated circuits define the third generation (about 1964-71). The first generation used vacuum tubes, the second discrete transistors, and the fourth the microprocessor - which is itself an integrated circuit, but on the far larger scale of LSI and VLSI.
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What is the responsibility of the logical unit in the CPU of a computer?
Answer: B
Correct answer: To compare numbers
The logic half of the ALU performs comparisons - equal to, greater than, less than - and the results are what conditional branches act on. The arithmetic half does the calculation, and the control unit directs the flow of information.
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Which of the following IC was used in third generation of computers?
Answer: D
Correct answer: Both a and b
Third-generation machines used SSI (small-scale integration, tens of transistors per chip) and then MSI (medium-scale, hundreds). LSI and VLSI, with thousands and then millions, belong to the fourth generation and made the microprocessor possible.
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