QUES: On 30 September 1915, troops of the Serbian Army observed three enemy aircraft approaching Kragujevac. Soldiers shot at them with shotguns and machine-guns but failed to prevent them from dropping 45 bombs over the city, hitting military installations, the railway station and many other, mostly civilian, targets in the city. During the bombing raid, private Radoje Ljutovac fired his cannon at the enemy aircraft and successfully shot one down. It crashed in the city and both pilots died from their injuries. The cannon Ljutovac used was not designed as an anti-aircraft gun, it was a slightly modified Turkish cannon captured during the First Balkan War in 1912. This was the first occasion in military history that a military aircraft was shot down with ground-to-air fire.

Which private shot down one aircraft with a cannon?
What is the answer?
ANS: Radoje Ljutovac
QUES: The Supervisory Board meets twice a month to discuss, plan and carry out the ECB’s supervisory tasks. It proposes draft decisions to the Governing Council under the non-objection procedure. It is composed of Chair (appointed for a non-renewable term of five years), Vice-Chair (chosen from among the members of the ECB's Executive Board) four ECB representatives and representatives of national supervisors. If the national supervisory authority designated by a Member State is not a national central bank (NCB), the representative of the competent authority can be accompanied by a representative from their NCB. In such cases, the representatives are together considered as one member for the purposes of the voting procedure.

How long is the term for the Chairman of the Supervisory Board?
What is the answer?
ANS: appointed for a non-renewable term of five years
QUES: The Lempel–Ziv (LZ) compression methods are among the most popular algorithms for lossless storage. DEFLATE is a variation on LZ optimized for decompression speed and compression ratio, but compression can be slow. DEFLATE is used in PKZIP, Gzip and PNG. LZW (Lempel–Ziv–Welch) is used in GIF images. Also noteworthy is the LZR (Lempel-Ziv–Renau) algorithm, which serves as the basis for the Zip method.[citation needed] LZ methods use a table-based compression model where table entries are substituted for repeated strings of data. For most LZ methods, this table is generated dynamically from earlier data in the input. The table itself is often Huffman encoded (e.g. SHRI, LZX). Current LZ-based coding schemes that perform well are Brotli and LZX. LZX is used in Microsoft's CAB format.

What is used in PKZIP, LZR, and Huffman?
What is the answer?
ANS:
unanswerable