CS 151 - Key Skills - Quiz

Note that this is an example of what can be used as a quiz over CS 151 material for courses that have CS 151 (or CS 201 or 202) as a prerequisite. For example, those taking CS 201 are assumed to have gained/retained the skills/knowledge to do well on this quiz.

Note that this sample quiz is not exhaustive. See CS 151 - Key Skills for a full list of the key skills.

Linux and Terminal

Fill in the blank, what is the shortcut or key used in the linux terminal for each of the following.

• Press this key to execute a command:
• Keys that let you run a previously typed command again:
• Key to press to auto-complete a filename or command:
• Shortcut for current directory (one character):
• Shortcut for directory one level up from current:
• Shortcut for your home directory (one character):
• Shortcut for the top of the entire file system (one character):
• Characters to put around a filename that has spaces:
• Wildcard character:

File in the blank, what is the linux command to do each of the following.

• Get how long since last system reboot:
• Get information about disk free space:
• Get which user is currently logged in on the terminal:
• Get what computer are you currently running commands on:
• Get which directory are you inside of:
• Clear the terminal screen:
• See which other users are currently logged in:
• Help about a command (manual):
• Change directory:
• Make a new directory:
• List directory contents:
• Flag/option to use with previous command to list details of files:
• Copy file(s):
• Remove files:
• Remove directory:
• Move or rename a file or directory:
• A terminal text editor:
• Change your password:
• Print out first few lines of a file:
• Change file permissions:
• Display current system memory usage:
• See current time and date:

Give the complete linux terminal command to complete each of the following tasks.

• Create a new directory HELLO in your home directory:
• Copy the contents of jkinne's GREAT directory into your home directory:
• Change directory to your home directory:
• Check to see who is logged in:
• List the contest of the directory ~cs151/ including the sizes of the files:

Python Keywords and Functions

What is the python keyword or function for each of the following.

• exit the current loop:
• in a loop, go to next iteration of the loop:
• determine whether two objects are the same object (not just value):
• load a module (two keywords):
• declare a function:
• loop with only condition:
• conditional statements (three keywords):
• loop with that iterates through a list:
• keyword to send a value back from a function:
• boolean operator, True only if both sides are True:
• boolean operator, True if either side is True:
• boolean operator, negates:
• boolean values (two keywords):
• remove from a list by position:
• handle an exception, basic use (2 keywords):
• raise/indicate an exception (2 keywords):
• test if something is inside of a list/string/tuple/dictionary:
• special value for a variable that has no value:
• empty statement that does not do anything:
• function to write to the screen:
• functions to convert to integer, floating point number, or string (3 functions):
• function to generate a sequence of numbers:
• function to get the length of a string, list, or tuple:

What is the name of the following programming concept.

• text data type
• data type for True and False
• data type that stores numbers with fractional parts (e.g., 3.14 or 2.2)
• data type that stores only integers

Python Operators and Expressions

What are the Python3 operator for each of the following.

• multiplication, subtraction, addition:
• integer division:
• floating point division:
• remainder:
• exponentiation:
• testing membership in a string, tuple, or list:

Evaluate the following Python3 expressions.

• 4 - 2 * 1
• 1 + 2 ** 3
• 7 // 2
• 'hello'[0:2]
• range(0, 4)
• '3' + '2'
• int('3') + int('2')
• '3' * 2
• 'Hello'.upper()
• len('hi there')

Basic Python Programs

Write a complete and correct Python3 program to do the following.

• Print the integers from 1 to 10 along with those numbers squared.
• Take two integers as input from the user and print a rectangle of *'s with those dimensions.
• Ask the user for the answer. If they type "42", print "but what is the question.". If they don't type "42" ask again, and keep asking until they type "42".
• Print the powers of 2 up to 1024 (which is 2**10).

Play Computer

Write down all variables in each of the following programs and keep track of their values as well as what is printed on the screen.

def fun(n):
  if n <= 0: return
  print(n)
  fun(n/2)
fun(42)

for i in range(0, 5):
  for j in range(i, 5):
    print('x'*j)

L = 'what is the meaning of this?'.split()
for x in L:
  print(x, 'a' in x)

Math

Complete each of the following math rules.

• 2^a+b = 2^a * 2^b
• y^a+b = y^a * y^b
• log_bx = y, means b^y = x, for any b > 1
• log_b(xy) = y log_b x, for any b > 1
• Arithmetic Sum: (1 + 2 + ... + n) = n * (n+1) / 2
• not (A and B) is equivalent to:

CS Terms

What is the definition of each of the following.

• bit:
• byte:
• KB:
• K Hz:
• RAM:
• SSD:
• CPU:

Base System

Do the following conversions between bases.

• Convert 15 from decimal to binary:
• Convert 1010 from binary to decimal:
• Convert 1010 from binary to hexadecimal:

What is the largest number possible for each of the following.

• Decimal number with 3 digits:
• Binary number with 3 bits (it's binary and decimal value):
• Hexadecimal number with 1 digit (it's hex and decimal values):