CPS quiz 1

Question 1

Computer’s major components

Answer 1

CPU, memory, storage device, communication
device, input device, output device

Question 2

CPU speed

Answer 2

hertz (Hz), megahertz (MHz), gigahertz (GHz)

Question 3

Communication device

Answer 3

transmitting signals over wire or wirelessly

Question 4

Systems software

Answer 4

Operating System (OS) such as Windows or Mac OS X

Question 5

Machine language

Answer 5

computers can execute instructions written in machine language,
however hard to program

Question 6

Assembly language

Answer 6

developed to make programming easier but are still harder to code

Question 7

Assembler

Answer 7

translates assembly language to machine language

Question 8

High-level language

Answer 8

English-like and easy to learn and program

Question 9

Compiler

Answer 9

translates high-level language to machine language

Question 10

Java

Answer 10

High-level language
Developed by Sun Microsystems

Question 11

Application Program Interface (API)

Answer 11

the library which contains all predefined
resources which can be used by developers

Question 12

Java Development Toolkit (JDK)

Answer 12

consists of separate programs for compiling, testing and
running programs

Question 13

Java Runtime Environment (JRE)

Answer 13

program for running Java programs

Question 14

Integrated Development Environments (IDE)

Answer 14

software to make it easier to write, test and
run programs

Question 15

Java Class

Answer 15

public class ClassName {
}

Question 16

Main Method

Answer 16

public static void main(String[] args) {
}

Question 17

Print Statement

Answer 17

System.out.print. and System.out.println

Question 18

source code

Answer 18

is the java class

Question 19

JVM

Answer 19

Java virtual machine

Question 20

syntax errors

Answer 20

results from writing code incorrectly and is detected by the compiler. Ex: missing semicolon at the end of a statement

Question 21

Runtime Errors

Answer 21

error which happens when the program is running which causes the program to abort.
 Ex: the program asks the user to enter a number but the user enters a word instead

Question 22

Logic Errors

Answer 22

the program runs but the programmer coded incorrect instructions which produces
incorrect results
 Ex: forgetting to include a space inside the double quotes in a print statement and the
output is all squished together.

Question 23

variables

Answer 23

storage location in the computer’s memory where a value may be stored. Values can be
changed in the program

Question 24

Constant

Answer 24

a constant is used to store a value in a program which does not change

Question 25

data type

Answer 25

is the kind of data stored in a variable (ex. integers (byte, short, int, long); real numbers (float, double))

Question 26

Numeric Operators

Answer 26

+, –, *, /, %

Question 27

Increment and Decrement Operators

Answer 27

++var, var++, --var, var—

Question 28

Augmented Assignment Operators

Answer 28

+=, -=, *=, /=, %=

Question 29

two types of import statements

Answer 29

Specific import o Wildcard import

Question 30

three types of conversions

Answer 30

assignment conversion - Ex: double y = 5; // y is 5.0 Arithmetic promotion - Ex: System.out.print(5 / 2.0); // prints 2.0 Casting - Ex: int dollars = (int)13.75 // dollars is 13

Question 31

scanner class

Answer 31

gets user input, java.util.Scanner

Question 32

math class

Answer 32

Constants  Math.PI o Exponent methods  Math.pow(a, b)

Question 33

a program and its data must be moved into its____ before it can be executed by the CPU

Answer 33

memory

Question 34

one gigabyte

Answer 34

is 1 billion bytes

Question 35

Which of the following are storage devices? Please select all

Answer 35

portable disk hard disk flash stick CD-ROM

Question 36

is a device to connect a computer to a local area network (LAN).

Answer 36

NIC

Question 37

Due to security reasons, Java ___________ cannot run from a Web browser in the new version of Java.

Answer 37

applets

Question 38

______ is not an object-oriented programming language.

Answer 38

C

Question 39

________ is architecture-neutral.

Answer 39

Java

Question 40

Every statement in a program must end with a semicolon.

Answer 40

True

Question 41

The JDK command to just compile a class (not run) in the file Test.java is

Answer 41

javac Test.java

Question 42

Which JDK command is correct to run a Java application in ByteCode.class?

Answer 42

java ByteCode

Question 43

Java compiler translates Java source code into _________.

Answer 43

Java bytecode

Question 44

A block is enclosed inside __________.

Answer 44

braces