A-Level Computer Science

Question 1

Search Engines are systems that locate resources on the internet. These resources could be ...?

Accepted Answer

Documents, Web Pages, Audio Files

Question 2

A searching algorithm that requires an ordered list

Accepted Answer

Binary Search

Question 3

Which one of these is NOT true about compression?

Accepted Answer

There are three stages of compression.

Question 4

In Dictionary Encoding many of the words are repeated.

Accepted Answer

True

Question 5

Processed have a fixed time. If incomplete, they join the back of the queue.

Accepted Answer

Round Robin

Question 6

Which statement is NOT about Serialisation?

Accepted Answer

Updates can sometimes be lost.

Question 7

Ensures that a concurrent execution of transactions leads to the same results.

Accepted Answer

Isolation

Question 8

What does ACID stand for?

Accepted Answer

Atomicity, Consistency, Isolation, Durability

Question 9

Which one of these is NOT an advantage of Normalisation?

Accepted Answer

It produces larger tables which can hold more data.

Question 10

Secret information to lock or unlock the data is known as ... ?

Accepted Answer

Key

Question 11

Which one of the data types gives us a TRUE or FALSE answer

Accepted Answer

Boolean

Question 12

Ensuring private attributes can only be amended through public methods is known as..

Accepted Answer

Encapsulation

Question 13

Which of these IS a problem with allowing multiple users to update a database?

Accepted Answer

Updates may get lost.

Question 14

Which one of these is NOT a type of Relationship?

Accepted Answer

Some-to-many

Question 15

All data is wiped when there is no power supplied.

Accepted Answer

Volatile Memory

Question 16

Which one of these is NOT true about Asymmetric Encryption?

Accepted Answer

Also known as a Private Key Encryption.

Question 17

Ensures that no transaction can violate any of the defined validation rules.

Accepted Answer

Consistency

Question 18

Which one of these is NOT true about Digital Certificates?

Accepted Answer

It has a copy of their private key.

Question 19

Which one of these is NOT true about Lossy Compression?

Accepted Answer

Images and Videos can get better resolution.

Question 20

What does SQL stand for?

Accepted Answer

Structured Query Language

Question 21

IDE stands for...

Accepted Answer

Integrated Development Environment

Question 22

The value given is added to the value stored in the index register to give the memory location.

Accepted Answer

Indexed addressing

Question 23

When a procedure or function calls itself

Accepted Answer

Recursion

Question 24

Encrypted data is known as plaintext.

Accepted Answer

False

Question 25

Which one of these data types can store decimal values?

Accepted Answer

String, Float

Question 26

The ability for objects of different classes to be treated in the same way.

Accepted Answer

Polymorphism

Question 27

In SQL, the * symbol means what?

Accepted Answer

It will display all the fields in the record.

Question 28

Which algorithm uses Heuristics?

Accepted Answer

A* Search

Question 29

Which of these is NOT true about Caesar Cipher?

Accepted Answer

Uses numbers to change the order of letters, randomly.

Question 30

Why is JavaScript Interpreted rather than compiled?

Accepted Answer

Because we don't know what architecture the users have

Question 31

The notation for linear complexity is..

Accepted Answer

O(n)

Question 32

When the address given is not an address but the value is known as...

Accepted Answer

Immediate addressing

Question 33

Register that decodes the instructions

Accepted Answer

CU

Question 34

Requires that a transaction must be processed in its entirety or not at all.

Accepted Answer

Atomicity

Question 35

The address of a variable is passed to a subprogram

Accepted Answer

Passing by reference

Question 36

Which one of these is NOT true about Flat File Databases?

Accepted Answer

Consists of multiple files.

Question 37

Which one of these is NOT true about Foreign Keys?

Accepted Answer

Two Foreign Keys act as a Secondary Key.

Question 38

The SELECT statement is used to extract a collection of ... from a given table.

Accepted Answer

Fields

Question 39

Which one of these is NOT true about Symmetric Encryption?

Accepted Answer

It is hard to intercept.

Question 40

The World Wide Web is the same as the Internet

Accepted Answer

False.

Question 41

Which one of these is NOT true about Lossless Compression?

Accepted Answer

Has a big impact on the file size.

Question 42

Ensures that once a transaction has been committed, it will remain so.

Accepted Answer

Durability

Question 43

Which one of these is NOT true about Normalisation?

Accepted Answer

Structure should disable a user to make complex queries.

Question 44

Unlike encryption, with hashing there is no way of getting back to the original state.

Accepted Answer

True

Question 45

Cheques paid in at a bank are scanned using a what?

Accepted Answer

MICR

Question 46

What stage of Normalisation is this in?

Accepted Answer

First

Question 47

Representing problems and data to be better understood when translated into a visual model is..

Accepted Answer

Visualisation

Question 48

An instance of a class is known as..

Accepted Answer

Object

Question 49

Breaking a problem down into sub-problems is known as?

Accepted Answer

Decomposition

Question 50

Turning reality into a model that can be processed is known as what?

Accepted Answer

Abstraction

A-Level Computer Science

Questions 50

A-Level Computer Science

Questions 50