GATE CS question library

All digital circuits can be realized using only

In an $11$-bit computer instruction format, the size of address field is $4$-bits. The computer uses expanding OP code technique and has $5$ two-address instructions and $32$ one-address instructions. The number of zero-address instructions it can support is ________

Consider a $3$-bit error detection and $1$-bit error correction hamming code for $4$-bit data. The extra parity bits required would be _____ and the $3$-bit error detection is possible because the code has a minimum distance of _______.

Which of the following predicate calculus statements is/are valid?