python exam 1 – Flashcards
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Where does a computer store a program and the data that the program is working with while the program is running?
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Main memory
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What is the encoding technique used to store positive and negative integers in the computer's memory?
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Two's-complement
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How many different values can a single byte take?
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256
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Which is a secondary storage device that has no moving parts, and is faster than a traditional disk drive?
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Solid state drive
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The CPU is able to quickly access data stored in any location in secondary storage.
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False
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The python language uses a compiler.
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False
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The instruction set for a microprocessor is unique and is typically understood only by microprocessors of the same brand.
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True
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How many different values can a single byte take?
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256
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What term refers to all the physical devices that a computer is comprised of?
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hardware
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Main memory is more commonly known as:
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RAM
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Convert the following binary value to decimal: 1011011
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91
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Which of the following is not an algorithm design technique?
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Machine code
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What is an argument?
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Data passed to a function
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Which of the following is not a data type in Python?
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loop
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Which of the following is a valid assignment?
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a6 = 7 + 5
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Which data type is returned by the input() function?
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str
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Which type of error produces an incorrect result but does not prevent the program from running?
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logic
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Which is the informal language that programmers use to create models of programs that have no syntax rules and are not meant to be compiled or executed?
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Pseudocode
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After the execution of the pictured statement, what is the data type of the variable total? total = 5/2
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float
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What is the name of the built-in function that is used to read a value that has been typed by the user on the keyboard?
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input()
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True/False: In Python, mathematical expressions are evaluated from left to right, regardless of which operators are used.
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False
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What does the pictured statement output? print(2.3+4.7)
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7.0
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A _ is a name that represents a value stored in the computer's memory
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variable
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When the + operator is used on two strings, what happens?
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The two strings are concatenated
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The _ structure of a program is the logical design that controls the order in which the statements are executed.
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control
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Multiple boolean expressions can be combined by using a _ operator.
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logical
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Which logical operator(s) perform short-circuit evaluation? Select all that apply
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or, and
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True/False: The Python language is not sensitive to indentation
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False
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When using the [blank] operator, one or both subexpressions must be true for the compound expression to be true.
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or
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Which of the following is the correct if clause to determine whether y is in the range 10 through 50?
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if y ; 10 and y ; 50:
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True/False: The 'not' operator is a binary operator
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False
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What is the result of the following expression, if x=5, y=3, and z=8? xx
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false
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In Python, which symbol is used as the not-equal-to operator?
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!=
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In flowchart, what is the symbol used for decision structure?
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diamond
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A [blank] operator compares two values and determines whether a specific condition exists between them.
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relational
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A Boolean variable is commonly referred to as a [blank] indicating whether a condition exists.
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flag
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What is the structure that causes a statement (or a set of statements) to execute multiple times?
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Repetition structure
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Which is the correct format for the while clause in Python?
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while condition :
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Which is not an example of an augmented assignment operator?
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;=
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What is printed during the final iteration of this loop? for num in range(4): print(num)
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3
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What are the values generated by range(2, 9, 2)?
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2 4 6 8
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In Python, a comma-separated sequence of values that are enclosed in a set of square brackets is called a:
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list
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A while loop is known as a(n) [blank] loop because it tests the condition before performing an iteration.
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pretest
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T/F: Both of the following for clauses would generate the same number of loop iterations: for num in range(4): for num in range(1, 5):
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True
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The [blank] function is a built-in function that generates a sequence of integer values
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range()
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When will the following loop terminate? while k != 999:
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When k refers to a value equal to 999
