Which statement best describes a signed magnitude representation?, A. The rightmost bit indicates the sign (1 for positive, 0 for negative), B. The leftmost bit (MSB) indicates the sign, and the rest represent the magnitude, C. All bits represent the magnitude only, D. Negative numbers are obtained by adding 1 to their inverted bits, What is the main drawback of using signed magnitude representation?, A. It requires extra hardware to store the MSB, B. It cannot represent zero, C. It creates two representations for zero (+0 and –0), D. It uses all bits for magnitude, In 1’s complement form, how is a negative number obtained?, A. By inverting all bits of its positive equivalent, B. By adding 1 to the positive number, C. By subtracting the positive number from all 1s, D. By flipping the MSB only, Which of the following correctly represents an unsigned 4-bit integer for decimal 10?, A. 1010₂, B. 0101₂, C. 1111₂, D. 1001₂, In Two’s Complement, how is –5 represented in 8-bit form?, A. 00000101, B. 10000101, C. 11111010, D. 11111011, What is the range of a 4-bit two’s complement signed integer?, A. –7 to +8, B. –8 to +7, C. –15 to +15, D. 0 to 15, For an n-bit unsigned integer, what is the maximum value?, A. 2ⁿ, B. 2ⁿ – 1, C. 2ⁿ⁻¹ – 1, D. 2ⁿ⁻¹, Which is the correct sequence to obtain a negative number in two’s complement?, A. Write positive in n bits → invert all bits → add 1, B. Write positive in n bits → add 1 → invert all bits, C. Invert MSB only → add 1, D. Write positive in n bits → subtract 1, What does ASCII stand for?, A. Advanced Standard Code for Internet Information, B. American Standard Code for Information Interchange, C. Automated System for Character Information Integration, D. American Script Code for Internal Interface, How many characters can be represented in ASCII?, A. 64, B. 128, C. 256, D. 512, What is the main advantage of Unicode over ASCII?, A. It uses fewer bits for representation, B. It supports multiple languages and global scripts, C. It stores characters as decimal codes only, D. It can only encode English alphabets, How many bits are used to represent each character in standard ASCII?, A. 6 bits, B. 7 bits, C. 8 bits, D. 16 bits, What does each tiny square in a digital image represent?, A. A color bit, B. A pixel, C. A byte, D. A header, What does bit depth (or color depth) determine in an image?, A. The resolution of the image, B. The number of colors or shades each pixel can display, C. The file compression rate, D. The file type of the image, In a 2-bit image, how many colors can be represented?, A. 2, B. 4, C. 8, D. 16, In a 24-bit RGB color model, each color channel (Red, Green, Blue) is represented by:, A. 2 bits, B. 4 bits, C. 8 bits, D. 16 bits, What is the role of the Image File Header?, A. It stores the image pixels only, B. It compresses the image data, C. It contains metadata needed to interpret the image, D. It displays the image on screen, Which of the following is not typically included in an image file header?, A. Resolution, B. File type, C. Pixel color values, D. Compression type, What is meant by “Resolution” in an image header?, A. The total number of bits per pixel, B. The total number of pixels along width × height, C. The brightness of the image, D. The number of bytes per pixel, 8. Which of the following best defines the term pixel?, A. The smallest unit of an image that stores a color value, B. A binary file used to store images, C. The header data of an image file, D. A collection of image formats, Why does a 24-bit image allow over 16 million colors?, A. Because it combines 8 bits from each of the three RGB channels, B. Because it uses 24 pixels per color, C. Because it uses one byte per pixel, D. Because each channel has only 16 shades, What is the connection between the image file header and the pixel data?, A. The header stores the visual image directly, B. The header instructs the computer how to interpret and reconstruct the pixel data, C. The header compresses the RGB data to smaller bits, D. The header merges all color channels into one.

A1.2.2 Data Representation in computers using binary systems

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