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WGU D278 Scripting And
Programming Foundations Exam
Study Guide Questions And
Correct Answers
Which operator should be used to determine if a number is evenly divisible by 5? A + B - C * D % % A car drove 200 miles using 10 gallons of fuel. Which operation should be used to compute the miles per gallon, which is 20? A Addition B Subtraction C Multiplication D Division Division A variable should hold a person's height in meters. Which data type should the variable be? A Integer B Float C String D Boolean Float A variable should hold the names of all past U.S. presidents.
Which data type should the variable be? A Integer array B Float array C String array D Boolean array String Array A program uses the number of seconds in a minute in various calculations. How should the item that holds the number of seconds in a minute be declared? A Constant float usertime B Variable float usertime C Constant integer secondsperminute D Variable integer secondsperminute Constant Integer secondsperminute A program determines if a user's age is high enough to run for U.S. president. The minimum age requirement is 35. How should the item that holds the minimum age be declared? A Constant integer minage B Variable integer minage C Constant integer 35 D Variable integer 35 Constant integer minage Given integer x = 3 and integer y = 5. What is the value of the expression ( x / 2.0) + y? A 5. B 6. C 6. 7 7.
B ( x >= 18) and ( x <= 24) C ( x < 18) or ( x > 24) D ( x < 18) and ( x > 24) B Which data type is used for items that are measured in length? A Integer B Float C String D Boolean B Which data type should be used to keep track of how many planes are in a hangar? A Integer B Float C String D Boolean A A function should convert hours and minutes to seconds, such as converting 1 hour and 10 minutes to 4,200 seconds. What should be the input to the function? A Hours only B Minutes only C Hours and minutes D Hours, minutes, and seconds C A function returns a number x cubed. For example, if x is 3, the function returns 3 3 3, or 27. What should be the input to the function? A x
B x, x C x, x, x D 27 A A function calculates the weight difference (Diff) given two sample weights (S and S2). What should be the output from the function? A S1 only B S2 only C S1 and S D Diff D Function P(integer x) returns integer y y = 2 * x What does P(5) evaluate to? A 2 B 5 C 10 D 25 C Function F() Put "Hey" to output What entire output appears after three successive calls to F()? A Hey B hhhey C heyheyhey D Hey Hey Hey C
to see if it the input provided does not match the correct answer, and continue prompting the user until the answer entered matches the correct answer. Which control structure supports Joe's needs? A For loop B While loop C Do-while loop D If-else branch C What is put to output by the following pseudocode? X = 3 do Put x to output Put " " to output x = x - 1 while x > 0 A 3 2 1 0 B 3 2 1 0 - 1 C 2 1 0 D 3 2 1 D A programmer has developed the following code: count = 0 while count is less than 5: print 'Hello' What is the result of implementing this code? A 'Hello' will print four times. B 'Hello' will print five times.
C The program will throw an error. D 'Hello' will print indefinitely. D What is the loop expression in the following pseudocode? I = 0 while i < 20 Put i to output i = i + 1 A i B i<20 /> C i = 0 D i = i + 1 B What is the loop variable initialization in the following pseudocode? Y = 0 s = 100. while y < 10 s = s + (s * 5.0) y = y + 1 A y = 0 B y = y + 1 C s = 100. D s = s + ( s * 5.0) A Order the steps needed to output the minimum of x and y from first (1) to last (4).
B Whether x and y are negative C Whether x is 1 D Whether x is 0 A What does the following algorithm accomplish? X = Get next input if x == - 1 Put "Goodbye" to output A Outputs - 1 when user types any input B Outputs "x" when user types - 1 C Outputs - 1 when x is positive D Outputs Goodbye when user types - 1 D What does an output of 1 indicate for the following algorithm running on a five- element list of integers? I = 0 x = 0 while i < 5 if list[i] < 0 x = 1 i = i + 1 Put x to output A All integers are positive. B All integers are negative. C At least one integer is negative. D At least one integer is positive. C
When should a programmer develop an algorithm to solve a problem? A Before knowing the problem B Before writing a program to solve the problem C While writing a program to solve the problem D After writing a program to solve the problem B Which text represents an algorithm? A Cats and dogs have tails. B Insert key, turn key, open door. C The forecast for tomorrow is rain. D A box has balls, bats, and hats. B Which text represents an algorithm? A Shake bulb; if it rattles, replace it. B Water is wet; fire is not wet. C Staring at the sun hurts the eyes. D The max speed is 60 mph. A An algorithm should output "OK" if a list's numbers are all non-zero, else the output is "Not OK." Which test is a valid test of the algorithm? A Input 0, 0, 0. Ensure output is "OK." B Input 5, 4, 0. Ensure output is "OK." C Input - 3, - 2, 5. Ensure output is "Not OK." D Input 99, 0, 5. Ensure output is "Not OK." D
relationships B Flow of logic and process interaction within a system C Physical resources or logical architecture of a system D Internal structure of a class and collaboration between classes or instances A Review the following use case diagram: What does a use case diagram do? A Diagrams a single use case B Connects several use cases to class diagrams C Provides an overview of several use cases D Lists use case goals C Which phase of a waterfall approach would create a sequence diagram that specifies the required order of events between completed program components? A Analysis B Design C Implementation D Testing D Which phase of an agile approach would define a hypothesis to find a problem in a program? A Analysis B Design C Implementation D Testing D
Which phase of an agile approach would create an executable program? A Analysis B Design C Implementation D Testing C Which phase of an agile approach would create a list of components needed to build an online auction site? A Analysis B Design C Implementation D Testing B Which phase of a waterfall approach defines a program's goals? A Analysis B Design C Implementation D Testing A After a programmer is done writing a program, another person runs the program hundreds of times, each time with different input, checking that each run yields correct output. Which phase of a waterfall approach is the person carrying out? A Analysis B Design
feedback? A Analysis B Design C Implementation D Testing A A programmer shows a program's first version to a customer. Based on feedback, the programmer begins writing a second version of the program. In which phase of an agile approach does the writing of a second version of the program occur? A Analysis B Design C Implementation D Testing C A programmer shows a program's first version to a customer. Based on feedback, the programmer creates a second version, and then has a colleague run the second version on numerous inputs to ensure outputs are correct. Which phase of an agile approach is that colleague carrying out? A Analysis B Design C Implementation D Testing D A programmer is currently programming the fourth version of a program. Each version has additional features to satisfy more customers.
In which phase of an agile approach does the programming of the fourth version occur? A Analysis B Design C Implementation D Testing C What does a programmer do first to use an existing programming library? A Write the library's functions B Modify the library's functions C Include the library D Discard the library C What relationship is common among a programming library's functions? A Functions all relate to the same purpose. B Each function competes with the other function. C Each function fixes bugs in the other functions. D Every function performs the identical computation. A What is an advantage of using a programming library? A The code has not been tested. B The code has already been tested. C The code can be used across programming languages. D The code has already been compiled. B
C Markup D Statically typed D A language uses tags around text to indicate how that text should be formatted. Which characteristic describes a language having such tags? A Objects B Compiler C Script D Markup D What is a characteristic of a compiled language? A Runs one statement at a time by another program B Is slower than an interpreted language C Converts to machine language before running D Runs on any machine having an interpreter C What is a characteristic of an interpreted language? A Runs faster than compiled languages B Outputs an interpreter to run the program C Runs easily on different kinds of machines D Needs to be converted to machine code first C What is an advantage of interpreted programs? A They generally run faster than compiled programs. B They can be modified at run time.
C They use memory more efficiently. D They create a separate file. B Which characteristic specifically describes a markup language? A Tags surround text to describe desired formatting. B A program's execution marks output with numbers and strings. C A compiler marks statements with 0's and 1's. D An interpreter executes statements one at a time. A Which characteristic specifically describes interpreted languages? A They are written using pseudocode. B They consist of a set of functions and objects. C They can be run one statement at a time. D They are converted to 0's and 1's. C Which characteristic specifically describes interpreted languages? A They are drawn out using graphical diagrams. B They can run on any machine having the right interpreter. C They are compiled to machine code before being executed. D They substantially support decomposing a program into objects. B
