
Quiz Data Mining K-Means
Authored by Tomy Nanda
Computers
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Apa tujuan utama dari algoritma K-Means dalam data mining?
Memprediksi nilai target secara akurat
Mengelompokkan data berdasarkan kemiripan
Menghapus data yang tidak relevan
Melakukan asosiasi antar item
2.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Langkah pertama dalam algoritma K-Means adalah:
Menghitung jarak antar data
Menentukan centroid awal
Mengelompokkan data secara acak
Menghapus outlier
3.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Parameter ‘K’ dalam algoritma K-Means menunjukkan:
Jumlah iterasi
Jumlah atribut data
Jumlah cluster yang diinginkan
Nilai jarak minimum
4.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Kriteria konvergensi dalam algoritma K-Means biasanya terjadi ketika:
Semua centroid berubah drastis
Jumlah cluster meningkat
Data tidak bisa diklasifikasi lagi
Centroid tidak berubah atau perubahan sangat kecil
5.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Metode yang paling umum digunakan untuk menghitung jarak antar data dalam K-Means adalah:
Jaccard distance
Manhattan distance
Cosine similarity
Euclidean distance
6.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Masalah utama dari algoritma K-Means adalah:
Terlalu lambat dalam memproses data
Tidak bisa menangani data numerik
Sensitif terhadap pemilihan centroid awal
Tidak dapat digunakan untuk data besar
7.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Setelah pengelompokan awal, K-Means melakukan penyesuaian centroid berdasarkan:
Data acak baru
Posisi cluster terdekat
Rata-rata data dalam setiap cluster
Titik terjauh dari setiap data
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