GCSE revision questions (self created)

GCSE revision questions (self created)

9th - 12th Grade

83 Qs

quiz-placeholder

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GCSE revision questions (self created)

GCSE revision questions (self created)

Assessment

Quiz

Computers

9th - 12th Grade

Practice Problem

Medium

Created by

Matt Stockdale

Used 1+ times

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83 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many different values can be represented with 7 bits?

127
128
64
255

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a DISADVANTAGE of binary search?

Is more inefficient than linear search
Is more efficient than linear search
Requires the data to be sorted
Requires the data to NOT be sorted

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes Merge Sort?

Annoying and complicated
Divide-and-conquer
Inefficient

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What would this sequence look like after two full passes of the bubble sort algorithm: 70, 99, 3, 7, 96, 4

3, 7, 4, 70, 96, 99

70, 3, 99, 7, 96, 4

70, 3, 7, 96, 99, 4

3, 7, 70, 4, 96, 99

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is true about the AND operator in programming languages?

It evaluates to true if either operand is true.
It evaluates to true only if both operands are true.
It evaluates to false if either operand is false.
It evaluates to false only if both operands are false.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which sorting algorithm is this?

1. Start at the beginning of the list.

2. Compare the values in positions 1 and 2 of the list - if they are not in ascending order then swap them.

3. Compare the values in positions 2 and 3 of the list and swap if necessary.

4. Continue to the end of the list.

5. If there have been any swaps, go back to step 1.

6. If there have not been any swaps, the list is sorted.

merge

linear

bubble

binary

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What sorting algorithm is this?

1. Select the median item in the list (if there are an even number of elements, round down, i.e select the element left of centre).

2. If the median item is equal to the search item, then stop searching and return item is found.

3. If the median item is higher than the search item then repeat steps 1 and 2 with the sub-list to the left.

4. If the median item is lower than the search item then repeat steps 1 and 2 with the sub-list to the right.

5. Repeat steps 3 and 4 unless the sub-list is empty.

6. If the sub-list is empty, stop searching and return item not found.

merge

linear

bubble

binary

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