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CSC Test 1 Review Questions with Solutions
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Exam of 13 pages for the course Enphase at Enphase (CSC Test 1 Review)
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CSC Test 1 ReviewTRUE or FALSE? In order to be classified as a "computer," a device must have a
keyboard and display screen? - answer False
TRUE or FALSE? A bus is a collection of wires that carry information as electrical
signals between the hardware components of a computer. - answer True
TRUE or FALSE? A bit is a unit of data that corresponds to one of two potential values
(commonly written as 0 and 1). - answerTrue
TRUE or FALSE? A kilobyte of storage is 2^10 = 1,024 bytes, where a byte is a
collection of 8 bits. - answerTrue
TRUE or FALSE? A hard drive is classified as volatile memory, because it requires a
constant power supply in order to retain its information. - answerFalse. Only RAM and
Cache are.
TRUE or FALSE? Keyboards and mice are examples of computer input devices. -
answerTrue
TRUE or FALSE? A directory is a collection of files that are organized together and
labeled with a common name. - answerTrue
TRUE or FALSE? The World Wide Web was developed in the early 1970s, shortly after
the creation of the Internet. - answerFalse
TRUE or FALSE? A Web browser is an example of applications software. - answerTrue
Describe the difference between hardware and software and identify two examples of
each. - answerHardware -- refers to the physical components of the computer
example: the monitor, keyboard, hard drive, etc.
Software -- refers to the programs that execute (i.e.,run) on the computer
example: carrying out tasks such as word processing or accessing the Web, Windows,
Mac OS
Describe the three essential components of a computer that make up the Von Neumann
architecture. How do these components work together to produce a machine that can
be programmed to complete different tasks? (COME BACK TO THIS QUESTION) -
answerInput/Output devices
, allow the user to communicate with the computer by entering commands and then
viewing the results.
Memory
stores information for the computer to process, as well as programs, or instructions
specifying the steps necessary to complete specific tasks.
Central Processing Unit (CPU)
is the component that carries out programmatic steps in order to process data.
Modern computers integrate several different types of memory, such as cache, RAM,
hard drive, and flash drive. Why are different types of memory used, as opposed to the
exclusive use of a particular technology? What would be the drawbacks, for example, of
using only cache memory, or only hard drive? - answerDifferent types of memory are
used because they have different characteristics which have different benefits.
RAM and Cache are expensive and volatile. However, they are very fast and are good
to use when you need to pull up things quickly.
Hard drive is slow compared to RAM and Cache, however, it is inexpensive and not
volatile, so it can be used by people with various backgrounds. It is good to store things
that you don't really need to pull up
Computer memory is usually grouped in bytes, which consist of 8 bits each. How many
different values can be represented using a byte? How many different values can be
represented using two bytes? - answerOne byte (8 bits) can represent 256 different
values. Two bytes (16 bits) can represent 65,536 different values.
The Intel Core i9 is an example of a processor, or CPU, as are the Intel i5 and AMD
Ryzen 7. List the two main tasks that the CPU performs in controlling the computer's
workings and provide a short explanation of each. - answerThe CPU is responsible for
two key tasks:
(1) fetching program instructions from memory, and (2) executing those instructions.
In what units are CPU speeds measured, and what does this measurement unit refer
to? If one computer has a 2GHz Celeron processor and another has a 2GHz AMD
Athlon processor, does that imply they will be able to execute the same program in the
same amount of time? Explain. - answerCPU speed is generally measured in gigahertz
(GHz), which indicates how many billions of basic instructions a CPU can execute in a
second.
For example, a 2 GHz CPU can execute approximately 2 billion instructions in a
second.
Since different families of CPUs will provide different basic operations, performance
comparisons based on CPU speed are not always accurate.
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