D278 EXAMINATION QUESTIONS AND ANSWERS
What does a programmer do first to use an existing programming library? - Include the
library
What relationship is common among a programming library's functions? - Functions all
relate to the same purpose.
What is an advantage of using a programming library? - The code has already been
tested.
Which language is dynamically typed? - Python
Which language is not built on object-oriented design principles? - C
A language substantially supports a programmer creating items like person, teacher, and
students. Each item has internal data and some operations. Which characteristic describes that
language? - object-oriented
A programmer wants a compiler to report an error if an integer variable is assigned with a
string. Which kind of language should the programmer use? - Statically typed
A language uses tags around text to indicate how that text should be formatted. Which
characteristic describes a language having such tags? - markup
What is a characteristic of a compiled language? - Converts to machine language before
running
What is a characteristic of an interpreted language? - Runs easily on different kinds of
machines
What is an advantage of interpreted programs? - They can be modified at run time.
Which characteristic specifically describes a markup language? - Tags surround text to
describe desired formatting.
Which characteristic specifically describes interpreted languages? - They can be run one
statement at a time.
Which characteristic specifically describes interpreted languages? - They can run on any
machine having the right interpreter.
, A car drove 200 miles using 10 gallons of fuel.
Which operation should be used to compute the miles per gallon, which is 20? - division
Which operator should be used to determine if a number is easily divisible by 5? - %
A variable should hold a person's height in meters.
Which data type should the variable be? - Float
A variable should hold the names of all past U.S. presidents.
Which data type should the variable be? - 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? - 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? - Constant integer
minAge
Given integer x=3 and integer y=5. What is the value of the expression (x/2.0)+y? - 6.5
Given float x=10.2 and float y=1.0. What is the value of the expression x/y? - 10.2
What kind of operator is the == in the expression I==20? - Equality
What is the purpose of parentheses () in a programming expression? - To group
expressions
Given float x= 3.0.
Which expression evaluated to 2.0?
X/3*2+2
What does a programmer do first to use an existing programming library? - Include the
library
What relationship is common among a programming library's functions? - Functions all
relate to the same purpose.
What is an advantage of using a programming library? - The code has already been
tested.
Which language is dynamically typed? - Python
Which language is not built on object-oriented design principles? - C
A language substantially supports a programmer creating items like person, teacher, and
students. Each item has internal data and some operations. Which characteristic describes that
language? - object-oriented
A programmer wants a compiler to report an error if an integer variable is assigned with a
string. Which kind of language should the programmer use? - Statically typed
A language uses tags around text to indicate how that text should be formatted. Which
characteristic describes a language having such tags? - markup
What is a characteristic of a compiled language? - Converts to machine language before
running
What is a characteristic of an interpreted language? - Runs easily on different kinds of
machines
What is an advantage of interpreted programs? - They can be modified at run time.
Which characteristic specifically describes a markup language? - Tags surround text to
describe desired formatting.
Which characteristic specifically describes interpreted languages? - They can be run one
statement at a time.
Which characteristic specifically describes interpreted languages? - They can run on any
machine having the right interpreter.
, A car drove 200 miles using 10 gallons of fuel.
Which operation should be used to compute the miles per gallon, which is 20? - division
Which operator should be used to determine if a number is easily divisible by 5? - %
A variable should hold a person's height in meters.
Which data type should the variable be? - Float
A variable should hold the names of all past U.S. presidents.
Which data type should the variable be? - 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? - 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? - Constant integer
minAge
Given integer x=3 and integer y=5. What is the value of the expression (x/2.0)+y? - 6.5
Given float x=10.2 and float y=1.0. What is the value of the expression x/y? - 10.2
What kind of operator is the == in the expression I==20? - Equality
What is the purpose of parentheses () in a programming expression? - To group
expressions
Given float x= 3.0.
Which expression evaluated to 2.0?
X/3*2+2
