People often call ______ as the brain of computer system
Answer: C
Correct answer: Central Processing Unit
The CPU is called the brain because it does the two things a brain is credited with: it computes (in the ALU) and it directs (through the control unit). The control unit and ALU are its parts, not the whole.
Please log in or register to report this question.
A dumb terminal has
Answer: D
Correct answer: a keyboard and screen
A dumb terminal has only the means to send keystrokes and display what it is sent - a keyboard and a screen, and no processing of its own. All the work is done by the host it is connected to. A terminal with a processor and memory of its own is an intelligent terminal.
Please log in or register to report this question.
Mnemonics, a memory aid, are used in which of the following languages?
Answer: B
Correct answer: Assembly language
Assembly language replaces the binary operation codes of machine language with short mnemonics - ADD, MOV, JMP - that a person can remember and read. An assembler translates them back to the binary the processor needs. Machine language has no mnemonics at all, and high-level languages use ordinary words and expressions instead.
Please log in or register to report this question.
On an abacus, the value of each bead in the upper deck (heaven) is
Answer: C
Correct answer: 5
On an abacus the bar divides the beads into two decks. Each bead in the upper deck - heaven - is worth 5, and each in the lower deck, earth, is worth 1. A column with one heaven bead and three earth beads pushed towards the bar therefore reads 8.
Please log in or register to report this question.
Microprocessors as switching devices are for which generation computers
Answer: D
Correct answer: Fourth Generation
The fourth generation is defined by the microprocessor, which put the whole central processing unit on a single chip. The first three generations used vacuum tubes, transistors and integrated circuits respectively.
Please log in or register to report this question.
A compiler is a translating program which
Answer: D
Correct answer: All of above
All three describe a compiler. It translates a high-level language into machine language; it does so for the entire program at once, producing an executable file; and having finished, it takes no part in running it. That last point is what separates a compiler from an interpreter, which translates and executes line by line and must be present throughout.
Please log in or register to report this question.
An integrated circuit is
Answer: D
Correct answer: Fabricated on a tiny silicon chip
An integrated circuit is a complete circuit - transistors, resistors and the connections between them - fabricated together on one small piece of silicon. Making them all at once, by the same photolithographic process, is what makes the IC dramatically cheaper than the equivalent discrete components, not costlier.
Please log in or register to report this question.
High density double sided floppy disks could store _____ of data
Answer: D
Correct answer: 1.44 MB
A high-density double-sided 3.5-inch floppy held 1.44 MB: 80 tracks a side, 18 sectors a track, 512 bytes a sector, over two sides. The earlier double-density disk held 720 KB.
Please log in or register to report this question.
Chief component of first generation computer was
Answer: B
Correct answer: Vacuum Tubes and Valves
The vacuum tube, or valve, was the switching element of the first generation. Transistors and integrated circuits define the second and third generations.
Please log in or register to report this question.
Multi user systems provided cost savings for small business because they use a single processing unit to link several
Answer: C
Correct answer: Dumb terminals
The saving came from sharing: one processor with many cheap dumb terminals attached, each little more than a keyboard and screen. A small business could then give several people access to the machine for far less than the cost of a computer each - the standard arrangement before personal computers became affordable.
Please log in or register to report this question.
