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DRDO CSE 2022 Paper 2 | Question: 11
A context-free grammar is in Chomsky Normal Form if every rule is of the form \[ \begin{array}{l} A \longrightarrow B C \\ A \longrightarrow a \end{array} \] where $a$ is a terminal, $A, B$ and $C$ are variables except $B$ and $C$ cannot be ... } S \longrightarrow A S B \mid a B \\ A \longrightarrow B \mid S \\ B \longrightarrow b \mid \varepsilon \end{array} \]
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DRDO CSE 2022 Paper 2 | Question: 25
Assume when encrypting $3$-bit plaintext with a block cipher with key $\text{K},$ ... with key $\mathrm{K}$ in counter mode (with initial counter value $=0):$ $\text{C}=100110000$ What was the plaintext?
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DRDO CSE 2022 Paper 2 | Question: 27
A transposition cipher (but not a rail-fence cipher) was used to produce the following ciphertext: $\text{X 2! H M E S S S E 2 Y T A 2 I I A}$ The key used was: $5 \; 2 \; 6 \; 3 \; 4 \; 1.$ What was the plaintext used (in English)?
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DRDO CSE 2022 Paper 1 | Question: 14
Derangements are permutations $\pi$ of the set $\{1,2, \ldots, n\}$ such that $\pi(i) \neq i.$ Compute the number of derangements on the set $1,2, \ldots, n$.
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DRDO CSE 2022 Paper 1 | Question: 24
Given a truth table of the full adder for three inputs. Draw a full adder circuit with a decoder and two $\text{OR}$ ...
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