Abstraction
Abstraction is the core components of a program and focusing on the ________ concept(s).
A. general
B. side
C. less important
what is A. General
The binary system is often described as "Base-2." What are the only two symbols used in this system to represent all data?
A) 1 and 2
B) 0 and 1
C) A and B
D) + and -
what is 0 and 1
A. While
B. FOR EACH
C. Continuous
B. FOR EACH
Which of the following will the code print:
a ← 10
b ← 15
c ← a
a ← 20
c ← b
DISPLAY(a)
DISPLAY(c)
A) 10 10
B) 10 15
C) 20 10
D) 20 15
What is D) 20 15
What part of flipping on a light switch would abstraction hide?
A. The light turning on
B. The wiring, circuits, and voltage behind the switch
C. Being able to see your surrounding
what is B. The wiring, circuits, and voltage behind the switch
What is the decimal (Base-10) equivalent of the binary number 1011?
A) 3
B) 9
C) 11
D) 13
what is 11
How many time do FOR EACH loops run?
A. Until the user inputs stop
B. Once
C. For each item in the entire list
what is C. For each item in the entire list
rate - 20
hours - 50
totalpay - 0
overtimepay - 0
If hours > 50:
Display("You earned overtime pay")
else
Display("Regular pay = $5, hours * rate")
A) you earned overtime pay.
B. Regular Pay = $50 * 20
C. 400
D. Regular pay = $400
what is "you earned overtime pay."
Which of the following list of hardware go from least to most abstract.
A. Truth table, logic gate diagram, circuit diagram
B. Truth table, circuit diagram, logic gate diagram
C. Circuit diagram, Truth table, logic gate diagram
D. logic gate diagram, Truth table, circuit diagram
what is C. Circuit diagram, Truth table, logic gate diagram
A computer system uses 5 bits to represent unique ID numbers for students. If the school grows and needs to assign unique IDs to 40 students, what is the minimum number of bits now required?
A) 5 bits
B) 6 bits
C) 7 bits
D) 8 bits
what is 6 bits
If-else statements compute a block of code based off each element in a list.
A. True
B. False
what is B. False
What will the variable num equal after the following code executes?
num ← 0
REPEAT 3 TIMES
{
num ← num + 5
}
num ← num * 2
A) 10
B) 15
C) 25
D) 30
what is D) 30
how do parameters provide abstraction.
A. They hide false input values
B. They allow software reuse for different values
C. They return values from procedures to the calling program
what is B. They allow software reuse for different values
A certain program uses a 4-bit unsigned integer system (maximum value of 15). What occurs if the program attempts to add the decimal values 12 and 7?
A) A round-off error occurs because the result is a fraction.
B) An overflow error occurs because the sum exceeds the 4-bit limit.
C) The computer automatically adds a 5th bit to store the result of 19.
D) The program converts the numbers to hexadecimal to avoid an error.
what is An overflow error occurs because the sum exceeds the 4-bit limit.
For a block of code under an ELSE statement to compute, what criteria must be met?
A. True
B. Repetetive
C. False
What is C. False
What will be the value of count after the following code runs?
count ← 0
numbers ← [1, 3, 5, 2, 4]
FOR EACH n IN numbers
{
IF (n > 2)
{
count ← count + 1
}
ELSE
{
count ← count - 1
}
}
DISPLAY(count)
A) 1
B) 2
C) 3
D) 5
what is A) 1
Which of the following is a example of coding related abstraction?
A. Typing comments into your code
B. The CPU
C. Machine learning
D. Pressing a button
What is D. Pressing a button
A network administrator is assigning IP addresses and needs to convert the decimal number 214 into an 8-bit binary byte. What is the correct binary representation of 214?
A) 11010110
B) 11101010
C) 10110110
D) 11011011
what is 1010110
What will the code print.
week - False
weekend - True
If weekday == true:
print("it is still the week.")
else:
print("It is the weekend!")
What is "it is the weekend!"
What will be displayed after the following code runs?
a ← 20
b ← 1
WHILE (a > b)
{
IF (a MOD 3 = 0)
{
a ← a - 5
}
ELSE
{
a ← a - 3
}
b ← b + 2
}
DISPLAY(a)
A) 8
B) 9
C) 11
D) 12
What is 9