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--- tanszek:oktatas:techcomm [2024/12/17 13:48] – [Practices] knehez
+++ tanszek:oktatas:techcomm [2024/12/17 13:57] (current) – [Examination Questions] knehez
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 ==== Examination Questions ====
+. The three types of sciences: inductive, deductive, and reductive. An overview of the scientific method.
+. The hierarchical levels of information, the concepts of sets and systems, the multi-level model of informational properties, and the concept of a signal and its basic types.
+. The quantitative properties of information, the concept of relative frequency, probabilities in finite event systems, Shannon's information-measuring function, the statistical properties of message sets, and the entropy and redundancy of a message set.
+. The syntactic properties of information. The concept of a code. Properties of different code types. Encoding messages, the Shannon-Fano procedure.
+. The concept of parity bit, Hamming distance, correcting a 1-bit error in 16-bit data.
+. Other error detection and correction methods: the concept of a checksum. Elias block protection.
+. Checksum. The protection algorithm of bank card numbers.
+. Simple compression methods: RLE coding, LZW coding.
+. Character codes: ASCII codes, Unicode, UTF-8 encoding and decoding.
+. Demonstration of Base64 encoding and decoding.
+. Demonstration of JPEG and MPEG compression, including their key properties.
+. The syntax of languages: demonstration of Backus-Naur (BN) form, syntax graphs, JSON schema. The essence of XML and DTD.
+. Implementation of key exchange over an eavesdropped channel.
+. The essence of RSA encryption.
+. Hash codes and their properties, password storage.
+. Digital signatures with and without hash codes.