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IELTS English Grammar
Articles, conditionals, tenses, passive voice, modal verbs and more — tested at Easy, Medium and Difficult levels.
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IELTS English Vocabulary
Academic words, collocations, idioms, phrasal verbs and topic-specific vocabulary — 52 topics across 3 difficulty levels.
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Cassandra Administration
Anti-entropy repair, cluster architecture, backup & recovery, compaction strategies and upgrade paths.
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Kubernetes CKA & CKAD
Pods, deployments, networking, security, storage, scheduling and cluster maintenance for CKA/CKAD exams.
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Oracle DBA
Performance tuning, RMAN backup, RAC, Data Guard, ASM, multitenant, GoldenGate and patching strategies.
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PostgreSQL DBA
Vacuuming, replication, indexing, MVCC, partitioning, query optimization and high availability setups.
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GRE Vocabulary
3,224 Barron’s high-frequency words with definitions and memory hints across all 26 letters.
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