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

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

A	2426
B	2446
C	1006
D	4446
E	4426

Question 2

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

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

Question 3

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

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

Question 4

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	5_digit_pass not a valid name for a variable
C	The white space between "password: " and ")" will cause an error
D	int(float(input())) has too many brakets

Question 4 Explanation: 

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

Question 5

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

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

Question 6

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

A	55
B	156
C	128
D	4
E	31

Question 6 Explanation: 

Example:

Question 7

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

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

Question 8

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

Question 9

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

A	False
B	True

Question 10

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 exactly three digits to the right of the decimal point.
B	a number with several digits to the left of the decimal point and more than three digits to the right of the decimal point.
C	a number with several digits to the right of the decimal point and exactly three digits to the left of the decimal point.
D	a number with several digits to the left of the decimal point and more than four digits to the right 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 11

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

A	Vacuum Tubes
B	Pipes
C	Transistors
D	Bridges
E	Relays

Question 12

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

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

Question 13

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

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

Question 14

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

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

Question 15

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

Question 16

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

Question 17

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

Question 18

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

Question 19

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

A	22
B	115
C	126
D	31

Question 20

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

A	Jam
B	Babbage
C	Abacus
D	Aibo
E	Eniac

Question 21

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	path coverage
C	graph coverage
D	statement coverage

Question 21 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 22

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	9
B	90
C	7
D	14
E	16
F	529

Question 22 Explanation: 

Integer is undefined.

Question 23

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

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

Question 24

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

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

Question 25

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

A	111110111001
B	1111101110
C	11111011100
D	1111101
E	111110

Question 26

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

A	1010001
B	1011011
C	1111001
D	1001001
E	1110101

Question 27

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

A	1410
B	1210
C	1110
D	1510
E	610

Question 28

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

A	**
B	+
C	not
D	=
E	>

Question 29

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

A	Calculator
B	Abacus
C	Punched card
D	Stick divisor

Question 30

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 31

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

A	python3
B	CaSeUp
C	jam!
D	sqrt
E	_1_2_3_

Question 32

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	RAM
C	PCI cards
D	printer

Question 33

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

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

Question 34

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

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

Question 35

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

Question 36

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

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

Question 36 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 37

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

A	196
B	190
C	182
D	199

Question 38

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

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

Question 39

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

A	C46
B	B46
C	CB6
D	11D6
E	B96

Question 39 Explanation: 

Question 40

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

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

Question 41

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

A	Multiplication
B	Integration
C	Break
D	Exponentiation
E	Division

Question 42

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

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

Question 43

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

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

A	9
B	8
C	1
D	0
E	-26

Question 44

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

A	Transcriber
B	Translator
C	Interpreter
D	Bridge
E	Compiler

Question 45

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

A	1010
B	10101
C	10100
D	10111

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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.