Given the following 8-bit binary number: 10000 110 stored in normalised floating point form where the first 5-bits are the mantissa and the last 3-bits are the exponent, what is the exponent telling us to do?

Shift the floating binary point 2 places to the left

Shift the floating binary point 6 places to the right

Shift the floating binary point 2 places to the right

Shift the floating binary point 6 places to the left

Why do we normalise floating point binary numbers?

So that we store numbers to the greatest degree of accuracy possible

So that we can perform binary arithmetic

There is no other way to store floating point binary numbers

So that we can store positive numbers in the negative form

What is the purpose of bitwise masks?

Allows you to isolate and extract, toggle and set bit values in a sequence

Allows you to perform addition and subtraction on negative numbers

Allows you to shift a binary number in order to perform division

Allows you to shift a binary number in order to perform multiplication

What is an integer data type?

A number that may have a fractional component

A set of alphanumeric characters

A value that is true or false, -1/1 or 0

What is a string data type?

A set of alphanumeric characters

A number that may have a fractional component

A value that is true or false, -1/1 or 0

What steps should you use to illustrate how the calculation 62 - 97 is performed in binary?

Convert 97 into -97 and then perform the addition (62 + -97)

Use Sign and magnitude representation to perform the calculation

Simply convert the numbers to binary and perform (62 - 97)

Convert 62 into -62 and then perform the addition (-62 + 97)

What is the character data type?

A single alphanumeric character

An single item of punctuation e.g. ?

What is meant by the term, 'character set'?

A defined list of characters recognised by the computer hardware and software

The data type used to assign memory for a variable

All the characters used in a language

The American Standard Code for Information Interchange

What does bitwise XOR do to a sequence of bits?

Toggles the bits from 0 to 1 or 1 to 0

ASCII is an example of:

A conversion technique for hexadecimal to denary

Why is sign and magnitude rarely used?

Arithmetic with numbers in sign and magnitude format is more difficult

Because it requires an extra bit in the accumulator register

It is an old representation of negative numbers and it has been superseded

Because it requires a RISC architecture

Why do we often choose to represent base-2 binary numbers in base-16 hexadecimal?

It provides for a more compact and human-readable format of a number than binary

Computers store memory addresses as hexadecimal values

Machine code run on the processor is written in hexadecimal

Computers can't perform calculations in binary

What are floating point data types?

Any data type that can store a decimal / fractional part of a number

Any data type that can store positive numbers

Any data type that can store negative numbers

Any data type that can store both positive and negative numbers

MH 1.4.1 Data Types

Authored by Matt Hunt

Computers

2nd Grade

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In floating point representation what is the purpose of the mantissa?

Stores the actual value

Stores the position of the binary point

Tells you if the number is using two's complement or sign and magnitude

Tells you know if the number is negative or positive

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How would you store the base-10 denary number -55 using two's complement in 8-bits?

0011 0111

1100 1001

1010 0100

0101 0111

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the hexadecimal number 20 in binary?

0010 0000

0000 0010

0001 0000

0001 0100

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the number 6 in binary?

0000 0110

0000 1010

0011 1111

0000 0111

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In this line of code: FOR counter = 1 to 10, what data type should counter be declared as?

String

Boolean

Real

Integer

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the binary number 0011 0100 in hexadecimal?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of binary left shifting 0100 0010 one digit?

1000 0100

0010 0001

0100 0001

0010 0010

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MH 1.4.1 Data Types

In floating point representation what is the purpose of the mantissa?

How would you store the base-10 denary number -55 using two's complement in 8-bits?

What is the hexadecimal number 20 in binary?

What is the number 6 in binary?

In this line of code: FOR counter = 1 to 10, what data type should counter be declared as?

What is the binary number 0011 0100 in hexadecimal?

What is the result of binary left shifting 0100 0010 one digit?

What is the result of using the XOR mask 1111 0000 with the binary value 1001 1101?

What does bitwise AND do to a sequence of bits?

What is the result of using an AND mask 0101 1111 with the binary value 0110 0001?

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