Fixed-width integers (uint8_t, uint16_t, uint32_t) in Embedded C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an 8-bit unsigned integer variable named value.

Embedded C

uint[1]_t value = 100;

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A8

B16

C32

D64

Attempts:

3 left

💡 Hint

Common Mistakes

Using a larger integer type than needed.

Confusing signed and unsigned types.

The uint8_t type is an 8-bit unsigned integer, perfect for small values.

2fill in blank

medium

Complete the code to declare a 16-bit unsigned integer named counter.

Embedded C

uint[1]_t counter = 5000;

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A8

B32

C16

D64

Attempts:

3 left

💡 Hint

Common Mistakes

Using uint8_t which is too small for 5000.

Using signed integer types by mistake.

The uint16_t type is a 16-bit unsigned integer, suitable for values up to 65535.

3fill in blank

hard

Fix the error in the code by choosing the correct fixed-width integer type for largeNumber.

Embedded C

uint[1]_t largeNumber = 3000000000;

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A32

B16

C8

D64

Attempts:

3 left

💡 Hint

Common Mistakes

Using uint16_t which cannot hold 3000000000.

Using signed types that might cause overflow.

The value 3000000000 requires at least 32 bits to be stored without overflow, so uint64_t is correct.

4fill in blank

hard

Fill both blanks to declare a 32-bit unsigned integer maxValue and assign it the maximum value.

Embedded C

uint[1]_t maxValue = [2];

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A32

B65535

C4294967295

D16

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning 65535 to a 32-bit integer instead of the max 32-bit value.

Using 16 instead of 32 for the type size.

uint32_t is a 32-bit unsigned integer, and its maximum value is 4294967295.

5fill in blank

hard

Fill all three blanks to declare a 16-bit unsigned integer threshold, assign it 1000, and check if it is less than 2000.

Embedded C

uint[1]_t threshold = [2];
if (threshold [3] 2000) {
    // do something
}

Drag options to blanks, or click blank then click option'

A8

B1000

C<

D16

Attempts:

3 left

💡 Hint

Common Mistakes

Using 8-bit type which might be too small.

Using wrong comparison operators like > or ==.

uint16_t is used for 16-bit unsigned integers, 1000 is assigned, and the less than operator < checks the condition.