Midterm1

Question 1

A sequence of instruction that specifies how to preform computation

Answer 1

Program

Question 2

The science of algorithms including discovery and analysis

Answer 2

Computer Science

Question 3

Sequence of steps that solves a problem

Answer 3

Algorithm

Question 4

Programming errors.

Answer 4

Bugs

Question 5

Examples of high level languages?

Answer 5

Java Phython C C++ Ruby & JavaScript

Question 6

Examples of low level languages

Answer 6

Machine Language

Question 7

Why is it better to write programs in high level languages?

Answer 7

They are easier to program and read and they are also portable (run on different types of computers)

Question 8

Reads high level languages. It does what the program says. Processes the programs a little at a time alternating reading lines and preforming computation.

Answer 8

The Interpreter

Question 9

Reads entire program and translates it before running.

Answer 9

The Compiler

Question 10

High level program translated to object code or executable

Answer 10

Source code

Question 11

The process of finding and removing errors

Answer 11

Debugging

Question 12

A special kind of object code used for Java programs. Similar to low level language but portable like high level language.

Answer 12

Byte Code

Question 13

Part of a program that specifies one step of an algorithm. Line of code that preforms a basic operation.

Answer 13

Statement

Question 14

A named sequence of statements

Answer 14

Method

Question 15

A collection of related methods

Answer 15

Class

Question 16

A part of a program that contains information about the program but has no effect when the program runs

Answer 16

Comment

Question 17

A sequence of characters; the primary data type for text.

Answer 17

String

Question 18

A statement that causes output to be displayed on the screen

Answer 18

Print Statement

Question 19

A special character signifying the end of a line of text. Also known as line ending or line break

Answer 19

Newline

Question 20

A sequence of code that represents a special character when used inside a string.

Answer 20

Escape Sequence

Question 21

Escape sequence for a new line

Answer 21

\n

Question 22

Escape sequence for double quote

Answer 22

"

Question 23

Escape sequence for tab

Answer 23

\t

Question 24

Escape sequence for backslash

Answer 24

\

Question 25

Process of compiling and running a Java program

Answer 25

source code -> compiler -> compiler -> byte code -> interpreter -> output

Question 26

Command Line for compiling a program named Hello

Answer 26

javac Hello.java

Question 27

Command Line for Running a program named Hello

Answer 27

java Hello

Question 28

``` Which is incorrect and why? int x =1.1; double y=1; double y=1/3; double 1.0/3.0; ```

Answer 28

1. //compile error 2. //legal ut bad style 3. //common mistake. It divides 2 integers so get 0.0 then it converts to a double 4. //correct

Question 29

What data type should you use for absolute precision?

Answer 29

Integers. When adding doubles the rounding errors will accumulate.

Question 30

Output for System.out.print("Hello" + 1 + 2);

Answer 30

Hello12

Question 31

System.out.print(1+2+"Hello");

Answer 31

3Hello

Question 32

Precedence of numeric variables

Answer 32

( ), (+,-)positive or negative signs, * / multiplicative, + - additive, = assignments

Question 33

Byte

Answer 33

1 byte -128 to 127

Question 34

short

Answer 34

2 byte -32,768 to 32,767

Question 35

int

Answer 35

4 bytes -2^31 to 2^31 -1

Question 36

long

Answer 36

8 bytes -2^63 to 2^63 -1

Question 37

Examples of Compile time Errors

Answer 37

When syntax rules are violated, parsing errors, braces and parenthesis don't match, semicolon missing, tells where error occurred sometimes not helpful

Question 38

Examples of Runtime Errors

Answer 38

"exceptions" when program is running

Question 39

Logic Error

Answer 39

compiles and runs but doesn't do right thing. You have to work backwards to find the problem. Usually hard to fix.

Question 40

Name storage location for values type is declared when variable created.

Answer 40

variable

Question 41

number, string, or other data that can be stored in a variable. Every value belongs to a type(for example, int or String)

Answer 41

value

Question 42

Statement that creates new variable and specifies its type

Answer 42

Declaration

Question 43

Set of values. Type determines which values it can have

Answer 43

Type

Question 44

Reserved word for compiler for analyze programs. Can't be used as variable names. Examples: public class and void

Answer 44

Keyword

Question 45

A group of classes related to each other

Answer 45

package

Question 46

Location of value in computer memory (hexadecimal integer)

Answer 46

address

Question 47

Collection of packages and classes that are available for use in other programs

Answer 47

library

Question 48

Allows programs to use classes defined in other packages

Answer 48

import statement

Question 49

Basic element of a program (word, space, symbol or number)

Answer 49

Token

Question 50

Value that appears as source code. Ex. "Hello" is a String ____ and 74 is an integer _____

Answer 50

literal

Question 51

Number that appears without explanation as part of an expression

Answer 51

magic number

Question 52

Variable, declared final, value cannot be changed

Answer 52

Constant

Question 53

String passed through printf to specify format of output

Answer 53

format string

Question 54

Special code beginning with % sign specific data type and format of corresponding value

Answer 54

format specifier

Question 55

Operator converts one data type to another

Answer 55

type cast

Question 56

Operator that gives a remainder in integer division

Answer 56

modulus

Question 57

Value you provide when invoke method. Value must have same type as corresponding parameter

Answer 57

Argument

Question 58

Cause method to execute. "calling" a method

Answer 58

Invoke

Question 59

Info method require before can run. Are variables contain values and types

Answer 59

Parameter

Question 60

Order in which Java executes method and statements. Not always starts at top

Answer 60

Flow of execution