Measure your programming foundations.

1 Concepts

What is an algorithm?

A A physical computer part B A step-by-step procedure for solving a problem C A programming error D A stored password

2 Data

What is a variable used for?

A Storing a value that a program can use B Repeating every instruction forever C Drawing only graphics D Connecting a computer to power

3 Data

Which pair contains Boolean values?

A 0 and 1.5 B yes and maybe C true and false D open and close

4 Control flow

Which construct is designed to repeat instructions?

A A loop B A comment C A string D A variable name

5 Functions

Why are functions useful?

A They make every value global B They group reusable behavior behind a name C They remove the need for data D They guarantee a program has no bugs

6 Data

In most programming languages, what is the index of the first item in a list?

A -1 B 0 C 1 D It is always 10

7 Code reading

PYTHON

x = 4
x = x + 3
print(x)

What does this code print?

A 3 B 4 C 7 D 43

8 Control flow

When does the body of a basic if statement run?

A When its condition is true B Exactly ten times C Only when the program starts D Whenever a variable is a string

9 Debugging

What is the best first step when a program produces an unexpected result?

A Rewrite the entire program immediately B Trace the relevant inputs and values near the failure C Delete all error messages D Add random delays

10 Data structures

Which structure is designed to associate keys with values?

A A map or dictionary B A plain comment C A Boolean operator D A loop counter

11 Functions

What does a return statement usually do?

A Restarts the computer B Sends a value back from a function and ends that call C Repeats the function forever D Turns every value into text

12 Code reading

PYTHON

for n in range(3):
    print(n)

Which values are printed?

A 1, 2, 3 B 0, 1, 2 C 0, 1, 2, 3 D 3 only

13 Algorithms

What must be true before standard binary search can be used correctly?

A The data must be sorted B Every value must be a string C The list must contain exactly ten items D The program must use recursion

14 Algorithms

Why does a recursive function need a base case?

A To decide when recursion stops B To make every call use more memory C To rename all variables D To convert recursion into a database

15 Code reading

PYTHON

count = 0
for a in range(2):
    for b in range(3):
        count = count + 1
print(count)

What does this code print?

A 2 B 3 C 5 D 6