CSE 1321 Test 2 Study Guide
Program design consists of
A step a programmer should do before they start coding a program in a specific language
Array Index
A value that indicates the position in the array of a particular value. The last element in a zero-indexed array would be the length of the array, minus 1.
2D Array
An array of an arrays, characterized by rows and columns, arranged in a grid format, but still stored in contiguous, or side-by-side memory, accessed using two index values.
What is the value of the variable divisor in the following equation? int divisor = 3/6;
Answer = 0
BEGIN MAIN CREATE inputValue = 0, smallestValue = 0 DO PRINT "Please enter a positive integer (0 to quit): " READ inputValue IF (smallestValue == 0 AND inputValue > 0) smallestValue = inputValue ELSE IF (inputValue > 0) IF (inputValue < smallestValue) smallestValue = inputValue END IF ELSE IF (inputValue < 0) PRINT "Invalid entry, must be positive integers" END IF WHILE (inputValue != 0) END DO WHILE IF (smallestValue != 0) PRINT "Smallest value entered was: " + smallestValue ELSE PRINT "Have a good day." END IF END MAIN What is the Sentinel value for the loop? Question options: ~ q ~ Q ~ -1 ~ 0
Answer: 0
Evaluate: 3-6%5*2
Answer: 1
How many times will this PRINT statement execute with the following code? BEGIN MAIN FOR (CREATE int i=7; i<10; i++) PRINT"Hello there." END FOR END MAIN Question options: ~7 ~4 ~3 ~10
Answer: 3 (it will be less than 10 three times, 7,8,9)
Evaluate as an integer: 5*7+3%2-4
Answer: 32
Evaluate (18%5)-(6-4)+1
Answer: 8
Given variables x and y with assigned values, complete the code so that it prints the smallest value properly. Assume x and y are not equal. { System.out.println(x + " is the smallest value!"); } else{ System.out.println(y + " is the smallest value!"); }
Answer: if (x < y )
What do loops that have no terminating condition do?
Appear to lock up
Which group of operators is always evaluated first in an expression?
Arithmetic
FOREACH loops cannot be used for which of the the following tasks?
Assignment
Shortcut Operators
Assignment statements that are shortcuts to perform variable changes.
If x=3, y=1, and z=5 then he following Boolean expression evaluates to true: (x>0) && (y=0) || (z<5)
False
In an IF...ELSE IF...ELSE IF structure each statement whose expression evaluate to true will run their block of code
False
Only WHILE Loops can be nested:
False
(T/F) In the equation 2+8/4*2, the multiplication operation is evaluated first
False (left to right first)
(T/F) Keywords can be used as variables identifiers/names?
False (they are used to define the syntax and structure of the Python language)
Which variable could hold the literal numeric value 3.141 without losing any information
Float x
++
Increment by 1 operator
What would be the best datatype to represent product? A variable that stores information about the number of items currently in stock in a grocery stores.
Int
IDE stands for
Integrated Development Environment
When a variable is declared within a method and its scope is within the method it is known as a(n)
Local Variable
Which group of operator is always evaluated last in an expression?
Logical
The time complexity for the bubble sort algorithm
O(n^2)
The time complexity for the selection sort algorithm
O(n^2)
||
OR operator
The symbols >, <, <=, >=, != and == are all _________ operators.
Relational
Which group of operators is always evaluated second in an expression?
Relational
This special input value is used to allow a user to end a loop
Sentinel
The parameters in the method call (actual parameters) and the method header (formal parameters) must be the same in
Sequence, data type, quantity
A______ contains 0 or more characters enclosed with double quotes
String Literal
Types of Complex Data
String, Classes, Arrays, Objects
(T/F) 2D arrays are declared in row, column order, meaning first value is number of rows, second value is number of columns
True
(T/F) 2D arrays are still homogeneous
True
(T/F) A flowchart is a type of diagram that represents an algorithm workflow or process
True
(T/F) A relational operator used when comparing primitive data type is !=
True
(T/F) A switch statement is similar to an IF statement in they both are used to alter the flow of a program
True
(T/F) A variable of datatype Char, can hold a single letter, number, or symbol
True
(T/F) An Array must be sorted for a Binary Search to work correctly
True
(T/F) An IF statement does not need to have an else clause
True
(T/F) An array can only hold variables of the same data type
True
(T/F) Assuming we have initialized an integer array of size 5, the following is a valid line of code: array[4] = 12;
True
(T/F) Debugging is the process of finding and correcting errors in your program's code
True
(T/F) Formal parameters in method headers require including the data type for each parameter in source code.
True
(T/F) If the variable is Tested is a Boolean, then the statement below is a valid control expression: IF(isTested)
True
(T/F) In an IF...Else IF...Else IF statement, the first conditional expression that evaluates to true is the only block o code that will run
True
(T/F) In general, the advantage of using a binary search over a linear search increases when searching larger sorted arrays
True
(T/F) In programming ! is considered a unary, logical operator
True
(T/F) In the equation 2+8/4*2,the division operation / is evaluated first
True
(T/F) Literals are values that are entered directly into code
True
(T/F) Logical operators are evaluated after comparison/relational operators
True
(T/F) Once an array is created it cannot be resized during program execution
True
(T/F) Software testing involves the execution o a software component or system component to evaluate one of more properties of interest
True
(T/F) Strings are immutable which means once a String object is created its contents cannot be changed.
True
(T/F) The MAIN method tells the program where to begin running code as it is the entry of starting point for the program
True
(T/F) The body of a method can be empty.
True
(T/F) The following line of code is valid and will compile: float variable = 1.23f;
True
(T/F) new is the reserved word used to create an object.
True
If the expression xyz % 3 == 0 is true and xyz is a positive integer, then the value stored in the variable xyz is evenly divisible by 3.
True
(T/F) An array index cannot be of the double, float, or string data type
True (Array index are always integer data type)
break
stops the loop
An object's method is called by
using the object's name, followed by a period and the method name.
Consider the expression: value >= 30, Which of the following is equivalent to this expression?
value > 30 OR value == 30
Literals
values that are entered into the code
Constants
values that cannot change while the program is running
Logical OR
requires two operands
Common escape sequences
Escape sequence \r = crriage return \n newline \t tab \' single quote \" double quote \\ backslash
_____loop runs a pre-determined (known) number of iterations
FOR
(T/F) A Linear Search is always more efficient than a Binary Search
False
(T/F) A default case required as part of a switch statement
False
(T/F) All method (function) headers must include parameters.
False
(T/F) All methods must have a return statement.
False
(T/F) An IF statement must always have an ELSE statement after it:
False
(T/F) Assuming we have initialized on integer array of size 5, the following is a valid line of code: array[5]=12;
False
(T/F) Brute force is a good approach to programming.
False
(T/F) DO-WHILE loops are determinate loops
False
(T/F) FOR loops are indeterminate loops
False
(T/F) In programming ! is considered a binary, logical operator
False
(T/F) In programming && is considered an arithmetic operator:
False
(T/F) In the equation 2+8/4*2, the addition operation is evaluated first
False
(T/F) Input is sending message to the console/user
False
(T/F) Logical operators are evaluated before comparison/relation operators
False
(T/F) Methods can return only primitive data types.
False
(T/F) Only FOR loops can be nested:
False
(T/F) Output is process of reading information from user, usually via keyboard or mouse
False
(T/F) Pseudocode form of writing should be used only when the logic of program is complex
False
(T/F) Strings are a primitive data type which support the '+' operation.
False
(T/F) The following is an example of a valid program in Pseudocode: END MAIN
False
(T/F)Assuming we have initialized an integer array of size 5, the following is a valid line of code: array =12;
False
Continue
"skips" the current iteration
logical operators
&& [and] || [or] ! [not]
Arithmetic Operators
+, -, *, / , %
What is the value of the variable remainder in the following equation? long remainder = 3%6;
3
8 simple data types:
4 subsets of integers (byte, int, short, long) 2 subsets of floating point numbers (double & float) Character Boolean
Comparison Operators
<, >, <=, >=, ==, !=
1D Array
A linear collection of data items in a program, all of the same type, such as an array of integers or an array of strings, stored in contiguous memory, and easily accessed using a process called indexing.
&&
AND
A string is a primitive data types
False
Use all capital letters for____ and separate worse with an underscore
Constants
--
Decrement by 1 operator
What is the name of the case that executes if not other cases match for a SWITCH statement structure?
Default case
Which of the following programming terms is enforced by declaring class attributes as private?
Encapsulation
Printing an___________ prints a special character in an output string
Escape Sequence
A________ must be declared by specifying the variable's name and the type of information that it will hold
Variable
The____ and ____-_____ loops run un-determined (Unknown) number of iterations
WHILE and DO-WHILE
Spaces, blank lines, and tabs are called
White Spaces
Sentinel value
a value that when evaluated by the loop expression causes the loop to terminate
The parameters in the method call (actual parameters) and the method header (formal parameters) must be the same in
sequence, data type, & quantity
Object Oriented Programming is categorized by use of
classes and objects
complex data types
combinations of or extensions to primitive data types supported by PROGRAMMING LANGUAGES, OS and DBMS?
Correct format for a 2D array
create myArray [5,10] OR create myArray [5][10]
Pseucode
is an informal high-level description of the operating principle of computer program or algoritm
A distinguishing feature of methods that have the reserved word void in the method header is that they have
no return statement
!=
not equal to operator
Logical NOT
only works on one operand
Loops are
repetition statements that allow us to execute a statement (or block of statements) multiple times
Logical AND
requires two operands
