Computer Science 217 – Introduction to Python

The database of questions will be available online for future students up to 10 years (published August 2012) or till the database crash or when Python 3 language rules are significantly updated.

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Computer Science (CPSC 217-UCAL) Midterm Exam

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Question 1

What is the base-8 equivalent of the base-10 number 25? (ID-CSM-22)

A	115
B	126
C	22
D	31

Question 2

What is the earliest form of computer? (ID-CSM-05)

A	Stick divisor
B	Punched card
C	Abacus
D	Calculator

Question 3

In the following program, a user entered the following in order; 5, 2, 9. The result will be... (ID-CSM-14)
x = input()
y = input()
z = input()
r = x + y + z
print ("The calculated value is ", r)

A	7
B	16
C	90
D	529
E	9
F	14

Question 3 Explanation: 

Integer is undefined.

Question 4

What is the base-2(binary) equivalent of the base-10 number 2012? (ID-CSM-20)

A	11111011100
B	111110111001
C	1111101110
D	1111101
E	111110

Question 5

What is the value of 185 in base-10 in base-16 (hexadecimal)? (ID-CSM-42)

A	B96
B	CB6
C	C46
D	11D6
E	B46

Question 5 Explanation: 

Question 6

What is the best level of test coverage that can be used to check for bugs in the program? (ID-CSM-02)

A	condition coverage
B	graph coverage
C	statement coverage
D	path coverage

Question 6 Explanation: 

However, none of these will prove that the program has no bugs at all. It is nearly impossible to check for all the bugs in a program.

Question 7

What do you use for conversion of human-readable source code into machine language? (ID-CSM-43)

A	Compiler
B	Transcriber
C	Translator
D	Bridge
E	Interpreter

Question 8

There is an error/bug on the following code. However, assuming the error has been fixed, what is the outcome if the user enters, a = 1 , b = 5 , c = 6 ? (ID-CSM-38)
Click on image in enlarge.

A	(-1+0j) and (-2+0j)
B	(-2+0j) and (-1+0j)
C	(-2+0j) and (-2+0j)
D	(-3+0j) and (-2+0j)

Question 9

Early electronic computers, such as ENIAC, were constructed using... (ID-CSM-08)

A	Bridges
B	Transistors
C	Relays
D	Pipes
E	Vacuum Tubes

Question 10

According to the traditional methodology in computing, the following item is connected to the North Bridge of the motherboard. (ID-CSM-19)

A	hard drive
B	printer
C	RAM
D	PCI cards

Question 11

One of the earliest electronic computers was known as... (ID-CSM-07)

A	Abacus
B	Aibo
C	Eniac
D	Jam
E	Babbage

Question 12

In a modern computer, the main memory (RAM) is normally connected directly to what part of the motherboard? (ID-CSM-09)

A	PCI (Peripheral Component Interconnect) Bus
B	USB (Universal Serial Bus)
C	South Bridge
D	ALU (Arithmetic Logic Unit)
E	North Bridge

Question 13

How would you enter values with exponents in Python? For example, 4². (ID-CSM-30)

A	4'2
B	4**2
C	4#2
D	4%2
E	4^2

Question 14

__A__ handles fast components such as the CPU, graphics and main memory and __B__ handles slower components such as the hard drive and USB devices. (ID-CSM-15)

A	A. South bridge B. North bridge
B	A. North bridge B. South bridge
C	A. North bridge B. PCI bridge
D	A. Processor bridge B. Logic bridge

Question 15

A(n) __________ is a set of instructions that a computer follows to perform a task. (ID-CSM-32)

A	programming language
B	interpreter
C	compiler
D	program
E	syntax codes

Question 16

What is exactly wrong with the following code? (ID-CSM-37)
Click on image in enlarge.

A	Input functions cannot have print statements within them.
B	First print statement has a syntax error.
C	There is a logical error at the calculation string.
D	Last print statement has a semantic error.

Question 16 Explanation: 

print ('To solve, ax**2 + bx + c = 0, please enter the following values.") Should be changed to: print ('To solve, ax**2 + bx + c = 0, please enter the following values.') Note the ".

Question 17

What is the base-2(binary) equivalent of the base-10 number 20? (ID-CSM-21)

A	1010
B	10101
C	10100
D	10111

Question 18

What does the ** operator denote in Python? (ID-CSM-40)

A	Exponentiation
B	Break
C	Division
D	Multiplication
E	Integration

Question 19

Moore's law state that... (ID-CSM-06)

A	the number of transistors on integrated circuits tripped approximately every year.
B	the number of transistors on integrated circuits doubles approximately every three years.
C	the number of transistors on integrated circuits doubles approximately every year.
D	the number of transistors on integrated circuits doubles approximately every two years.
E	the number of transistors on integrated circuits tripped approximately every two years.

Question 20

The statement print("%.3f" % x) will result in... (ID-CSM-26)

A	a number with several digits to the left of the decimal point and more than four digits to the right of the decimal point.
B	a number with several digits to the left of the decimal point and exactly three digits to the right of the decimal point.
C	a number with several digits to the left of the decimal point and more than three digits to the right of the decimal point.
D	a number with several digits to the right of the decimal point and exactly three digits to the left of the decimal point.
E	a number with several digits to the right of the decimal point and more than four digits to the left of the decimal point.

Question 21

What term is used to describe an unnamed or poorly documented numeric value in Python? (ID-CSM-44)

A	Arbitrary number
B	Magic number
C	Constant number
D	Alpha numeric number
E	String number

Question 22

Determining the value of 10011100. (ID-CSM-31)

A	55
B	156
C	128
D	31
E	4

Question 22 Explanation: 

Example:

Question 23

In Call of Duty 4: Modern Warfare, the player's historical record of achievements is most likely stored in a... (ID-CSM-28)

A	...bit.
B	...a digit.
C	...byte.
D	...a word.
E	...double word.

Question 24

When will a statement within an if will be executed? (ID-CSM-18)

A	At the end of the if statement.
B	If and only if the initial condition evaluated to be true.
C	In the order in which the statement is written into the code.
D	If and only if there are no other conditions prior to the statement within the if.

Question 25

UTF-8 is also known as Transformation Format—8-bit is developed in 1992 with backwards support for ASCII to represent every character in the Unicode character set. (ID-CSM-24)

A	False, because it was developed in 1995
B	True
C	False, because Transformation Format—8-bit is FT-8 not UTF-8

Question 26

The number 15 in base 6 can be written in base 10 as... (ID-CSM-04)

A	1510
B	1210
C	1110
D	1410
E	610

Question 27

Which of the following was used first to aid with mathematical computations? (ID-CSM-27)

A	North Bridge
B	Transistor
C	ENIAC
D	Babbage Difference Engine
E	Vacuum Tube

Question 28

What is the major difference between a for loop and a while loop? (ID-CSM-33)

A	While loop can be executed in multiple iterations as long as a conditional statement is true.
B	There are no differences between them. It is just a preference of the programmer.
C	While loop can be executed in multiple iterations for each item within a sequence while the control variable changes at each iteration. Hint: This is the behavior of a for loop.
D	For loops cannot be nested within a while loop, but while loop can be nested within a for loop.

Question 29

Which of the following has the highest precedence? (ID-CSM-12)

A	nor
B	not
C	and
D	<=
E	or
F	+
G	=

Question 30

Consider the base 10 number 100. In base 6, it would be represented as what? (ID-CSM-03)

A	4446
B	2426
C	1006
D	4426
E	2446

Question 31

What is wrong with the following Python code? (ID-CSM-25)
import sys
sys.stderr.write("Please enter the 5-digit password: ")
5_digit_pass = int(float(input()))

A	sys.stderr.write should read as sys.stder.write
B	int(float(input())) has too many brakets
C	5_digit_pass not a valid name for a variable
D	The white space between "password: " and ")" will cause an error

Question 31 Explanation: 

5_digit_pass not a valid name for a variable because it starts with a number.

Question 32

What is the binary value for the decimal 121? (ID-CSM-36)

A	1001001
B	1010001
C	1111001
D	1011011
E	1110101

Question 33

___ is an area of study that deals with biological and behavioral sciences. (ID-CSM-11)

A	Computer Vision
B	Database Management
C	Information Security Systems
D	Human Computer Interaction
E	Artificial Intelligence

Question 34

What is the base-10 equivalent of the base-4 number 3013? (ID-CSM-23)

A	199
B	190
C	182
D	196

Question 35

In Python, which of the following is true regarding the the range (x,y)? (ID-CSM-34)

A	x is exclusive and y is inclusive.
B	Both x and y are exclusive.
C	Range inclusiveness must be defined prior to creating a range function.
D	Both x and y are inclusive.
E	x is inclusive and y is exclusive.

Question 36

The basic definition of a computer is a tool that take data and processes and present results. (ID-CSM-17)

A	True
B	False

Question 37

A typical software program development cycle include several stages. Which of the following is not a fundamental stage in the cycle? (ID-CSM-29)

A	Designing the program.
B	Correcting logic errors.
C	Correcting syntax errors.
D	Writing the code.
E	Addition of new features.

Question 38

Who created the difference engine? (ID-CSM-16)

A	Gordon Moore
B	Leonard Adleman
C	Jame Patterson
D	Charles Babbage
E	Abacus Thompson

Question 39

Which of the following is an illegal (no allowed) variable name in Python? (ID-CSM-39)

A	sqrt
B	_1_2_3_
C	jam!
D	CaSeUp
E	python3

Question 40

When syntax errors are reported? (ID-CSM-01)

A	after the programs has run all of its statements and come to an end.
B	while the program is running, after some statements have been executed.
C	while you are creating your source code.
D	while the program is loading, before any statements are executed.

Question 41

Consider a program that coverts kilograms to pounds. A user enters 55 kg and the program reports 110 lb. In reality, 55 kg = 121 lb and the program's answer is incorrect. Based on this information, what type of error most likely present in this program? (ID-CSM-45)

A	Runtime error
B	Numeric error
C	Syntax error
D	Logic error
E	Value error

Question 42

Which of the following has the lowest precedence? (ID-CSM-41)

A	not
B	=
C	**
D	>
E	+

Question 43

The following code in Python will provide an output of... (ID-CSM-10)

z = 1 - 2 ** 3 * 4 + 5

A	9
B	-26
C	8
D	0
E	1

Question 44

In computer science, when a loop appears inside of another, it is known as what? (ID-CSM-13)

A	Attached loop
B	Included loop
C	String loop
D	Integrated loop
E	Nested loop

Question 45

Consider the following statement. A loop created in Python 3 never terminates. (ID-CSM-35)

A	This is most likely caused by running Python 2 in a Python 3 environment.
B	This is not an error since all loops supposed to run forever until a commend is given to terminate.
C	There is most likely an error in the Python 3 module.
D	There is most likely an error within the loop code.

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Credits: Based on the excellent class notes provided by, Dr. Ben Stephenson during Fall 2012.
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If you get a question wrong, you can still click on the other answers. You have multiple opportunities to select the correct answer. This will open up hints and explanations (if available), which will provide additional information.

What is Python 3?

Python is a high level programming language developed in 1991 mostly influenced by Java language. If you would like to take up Java, Python may be a good gateway to Java object oriented programming. It is a relatively easy language to learn with lots of built in useful functions and libraries. Since the initial deployment, it has been evolved to the current standard (2012) known as Python 3.

You do not need a compiler to run a Python based program, but it is recommended to download the modules for testing. There are several universities and colleges use Python 3 as their primary introductory language for Computer Science students.